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Electronics Circuit Protection Product Selection Guide A guide to selecting Littelfuse circuit protection components for electronic applications.

Littelfuse Circuit Protection Technologies 2–3 Overcurrent Protection T echnologies Fuses 4–5 Fuseholders 6 Positive Temperature Coefficient Devices (PTCs) 7 Overvoltage Suppression Protection Varistors (MOVs, MLVs) 8 Gas Discharge Tubes (GDTs) 9 PulseGuard® ESD Supressors 9 TVS Diodes 10–1 1 TVS Diode Array SPA® Diodes 12 PLED Light-Emitting Diode (LED) Protectors 13 SIDACtor® Protection Thyristors 14–15 Switching Thyristors 16–17 Common Circuit Threats and Protection Solutions 18–19 Application Solutions by Circuit Type and Related Threat 20–23 About this guide This guide provides a summary of key circuit protection consideration factors, descriptions of the technologies Littelfuse offers, and product selection tables. It is designed to help you quickly find a protection solution appropriate to your application. Specifications descriptions and illustrative material in this literature are as accurate as known at the time of publication, but are subject to changes without notice. Visit littelfuse.com for more information. ©2013 Littelfuse, Inc.

littelfuse.com WhY Choose CiRCuit PRoteCtioN Circuit protection devices interrupt overcurrent events and divert overvoltage transients. They increase safety and enable end products to survive harsh electrical conditions. Most electrical and electronic equipment require circuit protection devices. In many cases they must be installed to comply with safety and performance standards before the end products can be sold or used. Beyond this, strategically-selected protection devices will:

• Improve end-product uptime, sustainability and reliability
• Assure low warranty return, repair and replacement costs
• Minimize fire and shock risks and larger damage potential
• Minimize operating dangers and potential liabilities WhY Choose LitteLFuse Littelfuse is the global leader in circuit protection solutions. We are the only company to offer all of the pertinent circuit protection technologies, with products that can be used in virtually everything that uses electrical energy. Complementing our wide portfolio of circuit protection products is a global network of design and technical support expertise. We offer decades of design experience to help you address application challenges and achieve regulatory compliance. Your Single Source Littelfuse offers an extensive circuit protection product line. We design forward-thinking, application-specific solutions to provide assurance that your most demanding requirements will be met. Our goal is to provide the most complete range of options so that you will not have to make compromises. Testing Support Littelfuse can help assure that your products will withstand most common threats repeatedly and will fail safely under extreme circumstances. We can serve as an independent source to provide assistance as you design by offering lab testing capabilities for customer applications. This testing includes industry specific required power fault and ESD/EFT/lightning surge conditions. Application Knowledge For over 85 years, Littelfuse has maintained a focus on circuit protection, and we will continue to adapt as technologies evolve. Engineers and circuit designers around the world have come to rely on Littelfuse products and application knowledge to support their designs. Global Support Littelfuse products, application knowledge and technical support are available around the globe. We offer a network of regional customer support offices and hundreds of independent authorized distributor contacts to assist you. Visit www.littelfuse.com/contact-us to find local support near you. Standards Compliance Expertise Most Littelfuse products comply with a wide range of applicable industry and government guidelines, as well as our own rigorous quality and reliability criteria. We continually look forward and adapt to changing requirements, so that our products will comply with industry specific, national and international standards such as CCC, CSA, IEC, IEEE, ISO, ITU, Meti, RoHs, Telcordia, TIA and many more. FoR FuRtheR guidANCe Littelfuse product representatives will work with you to find circuit protection technologies that will meet your requirements. To address your requirements or questions in detail, please contact a representative near you (Littelfuse.com/contact-us). For reference diagrams, technical articles, and other application guidance materials to assist in your design processes, please visit Littelfuse.com/designsupport For detailed selection of Littelfuse circuit protection technologies and their common applications, please visit Littelfuse.com/products For a library of detailed application guides, please visit Littelfuse.com/technical-resources/application-designs To download the most current edition of this brochure and our product catalogs, please visit Littelfuse.com/catalogs

Overcurrent Protection Technologies: Fuses Completely stop current flow, which helps to identify faults; Wide range of options Ultimate protection for sensitive/ expensive/critical components Low thru Very High Not applicable Series impedance measured in nH Very Extensive Range of Options PTCs Resettable; No device replacement after most common overcurrent events Where overcurrent events may occur often, and continuous uptime desired Low thru High Not applicable Series resistance measured in ohms Surface Mount, Radial Leaded, Axial Strap Overvoltage Suppression Technologies: Multi-Layer Varistors (MLVs) Compact and capable of handling significant surges for their size ESD and EFT suppression in smaller and portable electronics Low thru Medium Moderate High Miniature Surface Mount Metal-Oxide Varistor (MOVs) Capable of withstanding very high energy transients; Wide range of options Appliance, industrial and very high energy suppression applications Medium thru Very High Moderate High Radial Leaded, Industrial Terminal GDTs Switches that turn to on state and shunt overvoltage to ground using a contained inert gas as an insulator Protection of telecom equipment from lightning surges Medium thru High Fast Low Surface Mount, Axial Leaded, 2/3 Lead Radial PulseGuard® ESD Suppressors Extremely low capacitance; Fast response time; Compact size ESD suppression; Ultra fast reaction; Low signal distortion Low Moderate Low Miniature Surface Mount PLED LED Protectors Shunt function bypasses open LEDs; ESD and reverse power protection High brightness outdoor LED lighting applications Low Very Fast Medium Miniature Surface Mount TVS Diode Array SPA® Diodes Low capacitance / low clamping voltage; Compact size ESD suppression; Low distortion; Ideal for I/O interfaces and digital & analog signal lines Low thru Medium Very Fast Low Extensive range of surface mount options TVS Diodes Fast response to fast transients; Wide range of options Semiconductor protection; telecom I/O interfaces, electronics, industrial equipment Medium thru High Fast High Axial Leaded, Radial Leaded, Surface Mount SIDACtor® Protection Thyristors Specifically designed to serve stringent telecom/ networking standards Telecom / Datacom and networking applications Medium thru High Very Fast Low Extensive range of surface mount and thru-hole options Switching Technologies: Power Thyristors Solid state switches that switch to low “on” state and control the flow of current Home appliances, power tools, outdoor equipment Not applicable Not applicable Not applicable Extensive range of surface mount and thru-hole options

littelfuse.com 1. Fuses and Holders — Fuses– Full range including surface mount, axial, glass or ceramic, thin-film or Nano style, fast-acting or Slo-Blo ® fuse. Clips– Used in applications that require a fuse to be easily mounted to a PCB, but real-estate is scarce. Clips are also ideal for high-current applications, allowing for better heat management of the fuse. They are the most economical solution. Blocks– An alternative solution to Clips but with easier placement on the PC board during manufacturing. In some instances, Blocks may provide insulation to the side ears of the clips. In addition to being through-hole, Blocks can also be screwed or riveted in place. Holders– The ideal solutions for those applications that require the cartridge fuse to be protected, providing a shock- safe environment. Panel- mount holders allow for easy replacement of the fuse from outside of the appliance, perfect for applications that require replacing the fuse without opening the appliance enclosure. (Pages 4-6) . 2. Positive T emperature Coefficient Devices (PTCs) — Provide resettable overcurrent protection for a wide range of applications (Page 7). 3. Varistors — Multiple forms, from Metal Oxide Varistors (MOVs) and Thermally Protected MOV (TMOV ® varistors) that suppress lightning transient voltages to Multi-Layer Varistors (MLVs) designed for applications requiring protection from various ESD/EFT transients in computers and handheld devices as well as industrial and automotive applications (Page 8). 4. Gas Discharge T ubes (GDTs) — Available in small footprint leaded and surface mount configurations, Littelfuse GDTs respond fast to transient overvoltage events, reducing the risk of equipment damage (Page 9) 5. PulseGuard® ESD Suppressors — Available in various surface mount form factors to protect high-speed digital lines without causing signal distortion (Page 9). 6. TVS Diodes — Suppress overvoltage transients such as Electrical Fast Transients (EFT), inductive load switching and lightning in a wide variety of applications in the computer, industrial, telecom and automotive markets (Pages 10 –11). 7 . TVS Diode Array – SPA ® Diodes —Designed specifically to protect analog and digital signal lines from electrostatic discharge (ESD) and other overvoltage transients such as EFT and Lightning (Page 12). 8. PLED Bypass Protectors — Specialty silicon devices that enable LED lighting strings to continue to function if any single LED fails as an open circuit, and also offer ESD and reverse power protection (Page 13). 9. SIDACtor ® Protection Thyristors — Complete line of protection thyristor products specifically designed to suppress overvoltage transients in a broad range of telecom and datacom applications (Pages 14–15). 10. Switching Thyristors — Solid-state switches used to control the flow of electrical current in applications, capable of withstanding rated blocking/ off-state voltage until triggered to the on-state (Pages 16–17). 5 8

Overcurrent Protection Technologies Product Specifications and Selection Guide Fuse PRoduCts Fuses provide protection by completely stopping the flow of energy to sensitive circuits. If current exceeds the fuse’s operating range, the metal wire or strip melts safely within an enclosure. Littelfuse offers the most extensive range of fuses available, and for easy replacement of cartridge fuses Littelfuse offers a wide selection of fuseholders including panel mount, in-line, and surface and thru-hole circuit board mount devices. See page 6 for fuseholder selection. (1) Detailed information about most product series listed here can be found on our web site. (2) Size for these surface mount items refers to common industry length and width dimensions of the device surface area. Example: 0402 = .04” x .02” (3) In some cases for these categories the ratings, agency approvals and specifications vary by part number and are presented here as ranges representing the whole series. Please refer to product data on www.littelfuse.com and in our data sheets for detailed information by part number. * Please refer to data sheet for detailed specifications. Series Name1 View Datasheet Order Samples Size2 Time Lag Fast Acting Very Fast Acting Device Range 3 (Operating Current Options in Amps) Max. Voltage Rating 3 (Volts) Interrupting Rating at Max. Voltage Rating 3 (Amps) Operating Temperature Range Agency Approvals 3 Halogen Free RoHS Compliant Lead Free UL UR CSA PSE UMF Surface Mount: Ceramic Chip 437 • • 1206 • 0.25 - 8 125 / 63 / 32 50 -55°C to +150°C

• • • • 438 • • 0603 • 0.25 - 6 32 / 24 50 • • • • 469 • • 1206 • 1 - 8 24 / 32 24 - 63 • • • • • 501 • • 1206 • 10, 12, 15, 20 32 150 • • • • Thin Film 466 • • 1206 • 0.125 - 5 125 / 63 / 32 50 -55°C to +90°C
• • • • 468 • • 1206 • 0.5 - 3 63 / 32 35 - 50 • • • • • 467 • • 0603 • 0.25 - 5 32 35 - 50 • • • • • 494 • • 0603 • 0.25 - 5 32 35 - 50 • • • • • Nano2® Fuse 448 • • 2410 • 0.062 - 15 125 / 65 35 - 50 -55°C to +125°C 449 • • 2410 • 0.375 - 5 125 50 • • • • • 451 / 453 • 2410 • 0.062 - 15 125 / 65 35 - 50 • • • • • • 452 / 454 • 2410 • 0.375 - 12 125 / 72 50 • • • • • 456 • • 4012 • 20, 25, 30, 40 125 100 • • • 458 • • 1206 • 1.0 - 10 75 / 63 50 • • • 443 • • 4012 • 0.5 - 5 250 50 • • • 464 • • 4818 • 0.5 - 6.3 250 100 • • • • 465 • • 4818 • 1 - 6.3 250 100 • • • • 462 • • 4118 • 0.500 - 5 350 100 -40°C to +80°C • • • 485 • • 4818 • 0.500 - 3.15 600 100 -55°C to +125°C • • • Telelink® Fuse 461 • • 4012 0.5 - 2.0 600 60 -55°C to +125°C • • • • 461E 4012 1.25 600 60 • • • OMNI-BLOK® Fuseholder 154T * • 0.375 - 5 125 50 • • • Fuse and Clip Assemblies 157 * • 0.062 - 10 125 35 - 50 -55°C to +125°C
• • • 157T * • 0.375 - 5 125 50 • • • 160 * • 0.5 - 5 250 50 • • • PICO® SMF Fuse 459 • • * • 0.062 - 5 125 50 - 300 -55°C to +125°C • • Flat Pak 202 • • * • 0.062 - 5 250 50 -55°C to +125°C • • EBF

littelfuse.com Series Name1 View Datasheet Order Samples Time Lag Medium Acting Fast Acting Very Fast Acting Device Range 3 (Operating Current Options in Amps) Max. Voltage Rating 3 (Volts) Interrupting Rating at Max Voltage Rating 3 (Amps) Operating Temperature Range Agency Approvals 3 RoHS Compliant Lead Free Americas Europe Asia UL UR CSA QPL UMF CE VDE TUV BSI Semko PSE K CCC CQC Radial Leaded / Socket: Micro™ Fuse / TR3 Fuse 269 • • 0.002 - 5 125 10,000 -55°C to +125°C • • • • 274 • • 0.002 - 5 125 10,000 -55°C to +85°C • • TR5® Fuse 370 • • • 0.4 - 6.3 250 35 - 50 -40°C to +85°C TE5 369 • • • 1 - 6.3 300 50 -40°C to +85°C Axial Leaded / Cartridge: PICO® Fuse / PICO® II Fuse Axial 251 • • • 0.062 - 15 125 300DC / 50AC -55°C to +125°C 253 • • • 0.062 - 15 125 300DC / 50AC • • • • • 275 • • • 20 - 30 32 300DC / 50AC • • • 3.6x10 mm 874 • • • 0.1 - 10 250 50 -55°C to +125°C

• • • • 4.5x14.5 mm (2AG) 208 • • • 0.125 - 10 350 100 -55°C to +125°C 220 • • Special Fuse 0.3 - 7 250 / 300 / 350 35 - 100 • • • • • • • 5x20 mm 217 • • • 0.032 - 15 250 35 - 150 -55°C to +125°C 232 • • • 1 - 10 250 / 125 300 / 10,000 • • • • • 285 • • • 0.125 - 20 250 400 - 1500 • • • • 477 • • • 0.5 - 16 400DC / 500AC 100 - 1500 • • • • • • • 977 • • • 0.5 - 16 450DC / 500AC 200 / 100 • • • • • 6.3x32 mm (3AG/3AB) 312/318 • •• • 0.062 - 35 250 / 32 35 - 300 -55°C to +125°C 322 • • • 12 - 30 65 200 - 1000 • • • • 505 • • • 10 - 30 450 / 500 20,000 - 50,000 • • • • • 506 • • • 15 - 20 600DC 10,000 • • • • • 508 • • 1000VAC / DC High Voltage Fuse

FusehoLdeR seLeCtioN guide Circuit Connection Method Wire Wire Connector Terminals TH= Thru-Hole SM= Surface Mount CT= Wire Connector Terminal QC= Quick Connect Fuseholder Type In- Line Fuseholders Panel Mount Fuse Enclosures Circuit Board Mount Fuse Enclosures Fuse Blocks Fuse Clips Fuse Type Fuse Series 4.5x14.5 mm (2AG) 150274 150300 150307 150308 3452 series Int. Shocksafe CT 254 011 - 008 TH 111501 345 series Int. Shocksafe ( old ) TH 254 101, 254 121 SM 111505

245001 Solder QC TH 254 131 TH 111506

245002 Nema QC QC 254 201 - 208 TH 111510

286377 Fip Top TH 111512

345 Shocksafe TH 345121 Shocksafe TH 354252 TH 100 / 111 Series

3455 Int. Shocksafe TH 4450718 / 595 / 596 TH 445073 TH 04450001 / 00300210

286677 Flip Top TH 598 / 652 TH 520 002, 520 101 TH 5200001

800 / 801 / 802 / 821 Series TH 810 / 811 / 813 / 814 QC 520 003, 520 005 TH 52000001009

823 Series Snap-in TH 830 / 831 / 834 CT 520 004 TH 52100001009

824 / 824 - 20 / 850 / 851 / 860 series TH 852 / 853 / 862 TH 646 / 649 / 656 TH 51900001009

870 Series Medical Grade TH PTF045 / PTF050 CT 647 TH 51800001009

820/ 820-20 Series Mini Shocksafe SM 658 TH 523 Series

601 CT PTF010 / PTF020 TH 445 Series

445 TH NY61AP

PTF030 / PTF035 / PTF040 TH PTF015 / PTF065 TH OCT136 PTF055 / PTF070 TH PTF075 / PTF077 TH FC51 TH PTF078 FH02A FB55 / FB58 6.3x32 mm (3AB/3AG) 312 313 314 322 326 332 373 505 506 508 605

155 Series

3453 Series Int. Shocksafe TH 345101 Shocksafe CT 354 Series CT 101001 / 101002 345 Series Int. Shocksafe (old) TH 810 Series QC 35406 CT 101003 / 102064

342 Series Traditionalf TH 811 Series QC 35408 CT 121001 / 121002

342006 Watertight TH 813 Series QC 35409 CT 121003 / 121004

TH 814 Series CT 356 Series TH 102071

344 Series Snap / Panel Mount TH 862 Series CT 359 Series TH 102076 / 102078

348 Series Snap Mount QC OMN002 TH 102079 / 102080

340 Series RF Shielded / Watertight QC OMN004 TH 122083 / 122087

346877 Flip Top QC OMN006 TH 122088 / 122093

342021 (FHN26W) Water Tight QC FB65 / FB66 TH 122090 / 100058 342024 (FHN26G2) Drip Proof TH 51800001009 342025 (FHN20G) Drip Proof CT 101010

800 Series Shocksafe TH 102074

801 / 802 / 803-01 Series TH 10207101009 030201

860 Series 0CT136

TR5® Fuse

570 Series TH 571 0000 000

Micro™ Fuse / TR3 282001 Front mt. Neoprene TH 281005 Vertical Silver 282007 Front mt. Conductive TH 281007 Horizontal Silver 282002 Rear mt. Neoprene TH 281008 Vertical Tin 282008 Rear mt. Conductive TH 281010 Horizontal Tin 280004 32V indicating Overcurrent Protection Technologies (continued)

littelfuse.com PtC PRoduCts PTCs (positive temperature coefficient) increase resistance as temperature increases. They are designed to prevent unsafe levels of current while allowing constant safe current levels, and their resistance will “reset” automatically when the current and temperature returns to a safe level. PTCs are typically used in applications where automatic reset is desired. Series Name1 View Datasheet Order Samples Size2 Hold Current (IHOLD) Max Voltage (VMAX) Max Fault current (IMAX) Operating Temperature Range Agency Approvals Halogen Free RoHS Lead Free cUR UR TUV Surface Mount: LoRho PTC (Low Resistance) • • 0402 0.1 - 0.5A 0603 0.5 - 2.0A 0805 0.75 - 3.0A -40°C to 85°C 1206 0.75 - 4.5A 1812 1.9 - 3.7A 2920 7.0A 0603L

• • 0603 0805L
• • 0805 (2012) 0.10 - 1.10 A 6 - 15 V 100 / 40 A • • • • • • 1206L
• • 1206 1210L
• • 1210 1812L
• • 1812 2016L
• • 2016 2920L
• • 2920 250S
• • see data sheet 0.13 A 60 V 3 A • • • • Radial Leaded: USBR
• • see data sheet 0.75 - 2.50 A 6 / 16 V 40 A -40°C to 85°C 16R 30R 60R 72R 250R 600R Battery Strap: SL (Low Resistance)
• • see data sheet 1.9 - 3.7 A 6 V 50 A -40°C to 85°C • • • • • • (1) Detailed information about most product series listed here can be found on our web site. (2) Size for these surface mount items refers to common industry length and width dimensions of the device surface area. Example: 0402 = .04” x .02”

Shorthand for “Variable Resistors,” Varistors possess characteristics that divert transient currents away from sensitive components. Littelfuse offers two types: Miniature surface mount Multi-Layer Varistors (MLVs) for small electronics applications and Metal Oxide Varistors (MOV) for higher energy applications. Overvoltage Suppression Protection Series Name1 View Datasheet Order Samples Technology Type Operating AC Voltage Range Operating DC Voltage Range Peak Current Range2 (A) Peak Energy Range (J) Operating Temperature Range Lines Protected Mount/ Form Factor Disc Size Agency Approvals RoHS Lead Free Halogen Free UR CSA VDE CECC QPL Surface Mount ML V / MOV: MHS • • Multi-Layer Zinc Oxide (MLV) 9 - 42 30 - 135 300 -55 to +125°C Surface Mount Not Applicable MLE • • 18 18 22 - 28 • ML • • 2.7 - 107 5.5 - 120 4 - 500 0.02 - 2.5 • AUML • • 18 • MLN • • 18 5.5 - 18 30 0.05 - 0.10 4 • CH • • Zinc Oxide (MOV) 14 - 275 18 - 369 100 - 250 1.0 - 8.0

• • SM7 • • 115 - 510 369 - 675 1200 23 - 40 -55 to +85°C
• • • • SM20 • • 20 - 320 26 6500 165 • • • • Radial Leaded MOV: UltraMOV™ Varistor • • Zinc Oxide 130 - 625 170 - 825 1750 -10000 12.5 - 720 -55 to +85°C 1 Radial Leaded 7, 10, 14 UltraMOV™ 25S Varistor • • 115 - 750 150 - 970 22000 230 - 890 25mm • • • • • • • C-III • • 130 - 660 3500 - 9000 40 - 530 10, 14, 20mm • • • • • • LA • • 130 - 1000 175 - 1200 1200 - 6500 11 - 360 7, 10, 14 ZA • • 4 - 460 5.5 - 615 50 - 6500 0.1 - 52 5, 7, 10, 14, Industrial High Energy T erminal MOV: BA/BB • • Zinc Oxide 130 - 2800 175 - 3500 50000 70000 450 - 10000 -55 to +85°C 1 Screw / Clip Terminals 60mm • • DA/DB
• •
• 130 - 750 175 - 970 40000 270 - 1050 40mm • • • HA
• • 130 - 750 175 - 970 25000 40000 200 - 1050 Industrial Packaged Radial Leads HB34, HG34, HF34
• 130 - 750 175 - 970 40000 270 - 1050 34mm • • • • • DHB34 • • 250 - 2800 330 - 3500 20000 70000 330 - 10000 34mm • • • • • CA
• • 250 - 2800 330 - 3500 20000 70000 330 - 10000 Bare Disc 60mm • Specialty Application MOV: MA • • Zinc Oxide 9 - 264 13 - 365 40 - 100 0.06 - 1.7 -55 to +85°C Axial Leaded Not Applicable • • • RA • • 4 - 275 5.5 - 369 100 - 6500 0.4 - 160 -55 to +125°C Inline Radial Leads Not Applicable • • • • High Reliability • 130 - 510 4 - 675 100 - 6500 0.4 - 190 -55 to +85°C (Varies) (Varies) • Thermally Protected MOV: TCMOV® 34S Varistor • Zinc Oxide 115 - 550 150 - 700 50000 280 - 960 -45 to +75°C Industrial Packaged Radial Leads 34mm • • SMOV™ 25S Varistor • • 115 - 750 150 - 970 20000 170 - 670 -45 to +75°C Industrial Packaged Radial Leads 25mm • • SMOV™ 34S Varistor • • 115 - 750 150 - 970 40000 280 - 1200 -45 to +75°C Industrial Packaged Radial Leads 34mm • • TMOV® 25S Varistor • • 115 - 750 150 - 970 20000 170 - 670 -55 to +85°C Radial Leaded 25mm • • • • TMOV® 34S Varistor • • 115 - 750 150 - 970 40000 235 - 1050 -55 to +85°C Industrial Packaged Radial Leads 34mm • • • • TMOV® Varistor / iTMOV® Varistor • •
• 115 - 750 150 - 970 6000 - 10000 35 - 480 -55 to +85°C Radial Leaded 14, 20mm • • • • • (1) Detailed information about most product series listed here can be found on our web. (2) Not an applicable parameter for Crowbar devices

littelfuse.com gdt PRoduCts GDTs (gas discharge tube) dissipate voltage transients through a contained plasma gas. They have high insulation resistance plus low capacitance and leakage to ensure minimal effect on normal operation of equipment. Littelfuse devices offer a small footprint and are available in leaded and surface mount configurations, with high surge handling capability. Their fast response to transient over-voltage events, and ability to dissipate large amounts of energy, translates into reduced risk of equipment damage. The amount of energy they can dissipate makes them a good choice for lightning surge protection, particularly for telecom equipment located in outdoor structures. Series Name1 View Datasheet Order Samples DC Breakover Voltage Range (Nom VBO) Max AC Surge Rating Peak Pulse Current (8/20µs) Max Capacitance Operating Temperature Range # Terminals Mounting Options RoHS Compliant Lead Free Mini Tube Surface Axial Lead Radial Lead Cartridge Clip High Voltage GDTs: AC • • 285 - 600 NA 5000A 1.5pF -40°C to +90°C 2 • • CG3 • • 1000 - 7500 5000A 1.5pF 2 • • Low to Medium Surge GDTs: CG5 • • 90 - 600 5A 5000A 1.5pF -40°C to +90°C 2 • • • • SL0902A • • 90 - 600 5A 5000A 1.5pF 2 • • • • SL1002A • • 75 - 600 5A 5000A 1.2pF 2 • • • • SL1003A • • 90 - 500 10A* 10,000A 1.2pF 3 • • • • • SL1011A • • 75 - 600 5A 5000A 1.5pF 2 • • • • Medium to High Surge GDTs: SG (1812 Size) • • 75 - 420 500 - 750 1.0pF -40°C to +90°C

• • • SL1122A • • 90 - 260 10A* 10000A* 100-270pF 3 • • SL1021A • • 90 - 600 10A* 10000A* 1.5pF 3 • • • • SL1024A • • 90 - 600 10A* 10000A* 1.5pF 3 • • • • PMT8 • • 90 - 400 10A* 20000A* 1.5pF 3 • • • • SL1011B • • 75 - 350 10A 10000A 1.5pF 2 • • • • SL1411A • • 75 - 600 10A 10000A 1.5pF 2 • • • • PMT3 • • 90 - 500 20A* 20000A* 1.5pF 3 • • • CG/CG2 • • 75 - 1000 20A 20000A 1.5pF 2 • • • • Very High Surge GDTs: SL1021B • • 90 - 600 10A* 20000A* 1.5pF -40°C to +90°C 3 • • • • SL1024B • • 90 - 600 10A* 20000A* 1.5pF 3 • • • • SL1026 • • 275 - 700 10A* 20000A* 2 • • • (1) Detailed information about most product series listed here can be found on our web site. * Total current through center (ground) terminal PuLseguARd® esd suPPRessoRs Series Name View Datasheet Order Samples Surface Mount Through-Hole Technology Type Working Voltage Array Package (No. of Lines) Single Line Package Typical Device Capacitance Leakage Current Rated Immunity to IEC 61000-4- 2 level 4 Also Rated for EFT or Lightning Bidirectional (transients of either polarity) Performs Low Pass Filtering PulseGuard® ESD Suppressors: PGB1
• • • Voltage Variable Material 0–24VDC SOT23 (2) 0402, 0603 0.04–0.12pF <1nA • • PGB2 • • • Voltage Variable Material 0–12VDC NA 0402, 0201 0.07pF <1nA • •

Overvoltage Suppression Protection (continued) tVs diodes TVS Diodes are used to protect semiconductor components from high-voltage transients. Their p-n junctions have a larger cross-sectional area than those of a normal diode, allowing them to conduct large currents to ground without sustaining damage. Littelfuse supplies TVS Diodes with peak power ratings from 200W to 30kW, and reverse standoff voltages from 5V to 512V. Series Name Photo View Datasheet Order Samples Package Type Reverse Standoff Voltage (VR) Peak Pulse Power Range† (PPP) Peak Pulse Current (IPP 8/20μs) Operating Temperature Halogen-Free RoHS Compliant UR Recognized Surface Mount-Standard Application (200–5000W): SMF • • SOD-123 5.0 - 54 200W -85° to +302° F (-65° to +150° C)

• • * SMAJ • • DO-214AC 5.0 - 440 400W • • • P4SMA • • DO-214AC 5.8 - 495 400W • • • SMA6J • • DO-214AC 5.0 - 12 600W • • • SMA6L • • DO-221AC 5.0 - 85 600W • • * SACB • • DO-214AA 5.0 - 50 500W • • • SMBJ • DO-214AA 5.0 - 440 600W • • • P6SMB • • DO-214AA 5.8 - 495 600W • • • 1KSMB • • DO-214AA 5.8 - 136 1000W • • • SMCJ • • DO-214AB 5.0 - 440 1500W • • • 1.5SMC • DO-214AB 5.8 - 495 1500W • • • SMDJ • DO-214AB 5.0 - 170 3000W • • • 5.0SMDJ • • DO-214AB 12 - 170 5000W • • • Axial Leaded-Standard Application (400–5000W): P4KE • • DO-41 5.8 - 495 400W -85° to +302° F (-65° to +150° C)
• • • SA • • DO-15 5.0 - 180 500W • • • SAC • • DO-15 5.0 - 50 500W • • • P6KE • • DO-15 5.8 - 512 600W • • • 1.5KE • • DO-201 5.8 - 512 1500W • • • LCE • • DO-201 6.5 - 90 1500W • • • 3KP • • P600 5.0 - 220 3000W • • • 5KP • • P600 5.0 - 250 5000W • • • Axial Leaded-High Power: 15KPA • • P600 17 - 280 15000W -85° to +302° F (-65° to +150° C)
• • • 20KPA • • P600 20 - 300 20000W • • • 30KPA • • P600 28 - 288 30000W • • • AK1 • • Radial Lead 76 1000A -67° to +347° F (-55° to +150° C)
• • • AK3 • • Radial Lead 15 - 430 3000A • • • AK6 • • Radial Lead 30 - 430 6000A • • • AK10 • • Radial Lead 30 - 430 10000A • • • AK15 • • Radial Lead 58 - 76 15000A -67° to +257° F Remark: "*" UR approval is pending.

littelfuse.com explore the latest Led lighting industry standards, product information, circuit diagrams and links to application notes and videos using this NeW e-book. scan this code to view our Led Lighting design guide. Led LightiNg desigN A guide for protecting ethernet circuits and equipment from electrostatic discharge (esd), lightning, power faults and other electrical transient threats. scan this code to view our ethernet design guide. etheRNet PRoteCtioN A guide for protecting electronic circuits and interfaces from electrostatic discharge (esd) using tVs diode Arrays. scan this code to view our esd Protection design guide. esd PRoteCtioN Learn about the key selection criteria and tradeoffs among protection technologies for usb 3.0 devices. Recently updated! scan this code to view our usb 3.0 Circuit Protection Application Note. usb 3.0 CiRCuit PRoteCtioN tVs diodes (continued) Series Name Photo View Datasheet Order Samples Package Type Reverse Standoff Voltage (VR) Peak Pulse Power Range† (PPP) Peak Pulse Current (IPP 8/20μs) Operating Temperature Halogen-Free RoHS Compliant UR Recognized AEC-Q101 Compliant Automotive Application: TPSMA6L • • DO-221AC 10 - 60 600W -85° to +302° F Remark: "*" UR approval is pending.

Overvoltage Suppression Protection (continued) tVs diode ARRAY – sPA® diodes TVS Diode Arrays are designed to protect analog and digital signal lines from electrostatic discharge (ESD), Electrical Fast Transients (EFT), and lightning-induced surge currents. Offering low dynamic resistance for improved clamping performance, TVS Diode Arrays are offered in a wide range of industry standard discrete and multi-channel SMD packages. Features of this portfolio include capacitance as low as 0.4 pF and enhanced ESD capability up to ±30kV (contact discharge). Series Name Photo View Datasheet Order Samples Package Type Working Voltage Capacitance Number of Channels ESD Rating (Contact Discharge, IEC61000-4-2) Clamping Voltage (tP=8/20µs) Maximum Surge Rating (tP=8/20µs) Lead Free/ Green RoHS Compliant General Purpose ESD Protection (SCR Diode Array): SP720 • • PDIP SOIC 2-30V 3pF 14 4kV 2V @ 1A 3A • • SP721 • • 2-30V 3pF 6 4kV 2V @ 1A 3A • • SP723 • • 2-30V 5pF 6 8kV 2V @ 2A 7A • • SP724 • • SOT23 2-20V 3pF 4 8kV 2V @ 1A 3A • • SP725 • • SOIC 2-30V 5pF 4 8kV 2V @ 2A 14A • • General Purpose ESD Protection (TVS Discretes and Arrays): SP05 • • SC70 SOT23 SOT143 MSOP 5.5V 30pF 2 / 3 / 4 / 5 / 6 30kV N/A N/A • • SP1001 • • SC70 SOT553 SOT563 SOT963 5.5V 8pF 2 / 4 / 5 15kV 8.0V @ 1A 2A • • SP1002

• • SC70 6.0V 5pF 1 / 2 8kV 9.2V @ 1A 2A • • SP1003 • • 0402 (SOD723) 0402 (SOD882) 5.0V 30pF 1 30kV 12.0V @ 7A 7A • • SP1004
• • SOT953 6.0V 5pF 4 8kV 10V @ 1A 1A • • SP1005 • • 0201 (Flipchip) 0402 (SOD882) 6.0V 30pF 1 30kV 9.3V @ 1A 10A • • SP1006 • • 0201 (µDFN-2) 6.0V 25pF 1 30kV 8.3V @ 1A 5A • • SP1007 • • 0201 (Flipchip) 0402 (SOD882) 6.0V 3.5pF 1 8kV 11.2V @ 1A 2A • • SP1008 0201 (Flipchip) 6.0V 6pF 1 15kV 10.7V @ 1A 2.5A • • SP1011 • • µDFN-6 6.0V 7pF 4 15kV 8.7V @ 1A 2A • • Low Capacitance ESD Protection: SP3001 • • SC70 6.0V 0.65pF 4 8kV 9.5V @ 1A 2.5A • • SP3002 • • SC70 SOT23 µDFN-6 6.0V 0.85pF 4 12kV 9.5V @ 1A 4.5A • • SP0504S SOT23 SP3003 • • µDFN-6 SC70 SOT5x3 MSOP10 6.0V 0.65pF 2 / 4 / 8 8kV 10.0V @ 1A 2.5A • • SP3004 • • SOT563 6.0V 0.85pF 4 12kV 10.0V @ 1A 4A • • SP3010 • • µDFN-10 6.0V 0.45pF 4 8kV 10.8V @ 1A 3A • • SP3011 • • µDFN-14 6.0V 0.40pF 6 8kV 11.0V @ 1A 3A • • SP3012 • • µDFN-10 µDFN-14 5.0V 0.50pF 4 / 6 12kV 6.6V @ 1A 4A • • SP3021 0402 (SOD882) 5.0V 0.50pF 1 8kV 13.1V @ 1A 2A • • SP3030 0402 (SOD882) 5.0V 0.50pF 1 20kV 9.2V @ 1A 3A • • SP3031 0402 (SOD882) 5.0V 0.80pF 1 10kV 6.9V @ 1A 5A • • SP0524P µDFN-10 5.0V 0.50pF 4 12kV 6.6V @ 1A 4A • • Lightning Surge Protection: SRV05-4 SOT23 6.0V 2.4pF 4 20kV 11.5V @ 5A 10A • • SP03-3.3 • • SOIC 3.3V 16pF 2 30kV 15V @ 100A 150A • • SP03-6 • • SOIC 6.0V 16pF 2 30kV 20V @ 100A 150A • • LC03-3.3 SOIC 3.3V 9.0pF 2 30kV 17V @ 100A 150A • • SP2502L SOIC 3.3V 5.0pF 2 30kV 20V @ 75A 75A • • SLVU2.8 SOT23 2.8V 2.0pF 1 30kV 13.9V @ 24A 40A • • SLVU2.8-4 • • SOIC 2.8V 2.0pF 4 30kV 13.9V @ 24A 40A • • SR70 • • SOT143 70V 2.0pF 2 30kV 12V @ 30A 40A • • SP4060 • • MSOP 2.5V 4.4pF 8 30kV 8.0V @ 10A 20A • • SP2504N µDFN-10 2.5V 3.5pF 4 30kV 6.3V @ 5A 20A • • SP3304N µDFN-10 3.3V 3.5pF 4 30kV 7V @ 5A 20A • •

littelfuse.com PLed Light-emittiNg diode (Led) PRoteCtoRs Littelfuse PLED devices provide added reliability to LED lighting strings. Designed to minimize the impact of losing an entire LED string due to a single LED failure, PLED devices provide a switching function that will bypass LEDs that go open circuit, and allow current to flow to the remaining LEDs in the string. PLED devices also offer LED protection against electrostatic discharge (ESD) and accidental reverse power connection (PLED5 devices only). Designed to serve the needs of high brightness outdoor LED lighting applications (advertising and traffic signs, roadway/pathway/runway lighting, aircraft and emergency lighting, etc), PLED devices help assure reliability and lower maintenance costs. Part Number Photo View Datasheet Order Samples Powermite QFN 3x3 DO-214 VBR breakdown IH IS IT@VT VT and IT Critical rate of rise dV/dt Volts mAmps mAmps Amps Volts Volts Min Max Max Max Max Max PLED6M • • • 5.5 7.5 12 70 0.35 1.2 N/A PLED6Q12 • • • 6 16 5 100 1.0 1.2 250V/µs PLED6S • • • PLED9Q12 • • • 9 18 PLED9S • • • PLED13Q12 • • • 13 26 PLED13S • • • PLED18Q12 • • • 18 33 PLED18S • • • Part Number Photo View Datasheet Order Samples QFN 2x2 SOT 89 VAK Input Voltage VTO Turn-On Voltage IS Switching Current VOS On-State Voltage VOSR Reverse On-State Voltage IS On-State Current IOSR Reverse On-State Current VESD ESD WIthstand Voltage (IEC61000-4-2) Volts Volts mAmps Volts Volts mAmps mAmps kV Max Min Typ Max Max Min Max Max Max Contact Air PLED5Q12 • • • 40 4.65 4.9 5.15 20 1.3@ IAK=350mA 1.4@ IAK=350mA 500 500 ±8 ±15 PLED5HT • • • 38 1.8@ IAK=700mA 1.8@ IAK=700mA 700 700 ±8 ±15

Overvoltage Suppression Protection (continued) sidACtor® PRoteCtioN thYRistoRs SIDACtor® Protection Thyristors are designed to suppress overvoltage transients in telecom and datacom equipment, and are able to divert currents as high as 5000A to ground within nanoseconds of reaching their breakover voltage. Littelfuse offers a wide range of configurations including DO-214AA, DO214AC, COMPAK (3-Pin DO-214), SOT23-5, QFN, MS-012 and modified MS-013 surface mount, TO-92, TO-218, DO-15, modified TO-220, and TO-220 through-hole package options designed to handle medium to high energy transients. Series Name Photo View Datasheet Order Samples Package Type Type Standoff (working) Voltage (VDRM) Switching Voltage (VS) Peak Pulse Rating: RoHS Compliant UR Recognized 2/10µs 10/1000µs 8/20µs Broadband Optimized Protection: MC Series

• DO-214AA A 6 - 25 25 - 40 150A 45A 150A
• • C 6 - 320 25 - 400 500A 100A 400A
• TO-92 C 6 - 320 25 - 400 500A 100A 400A
• Modified TO-220 A Pin 1-2, 3-2: 6-275 Pin 1-3: 12-550 Pin 1-2, 3-2: 25-350 Pin 1-3: 50-700 150A 45A 150A C 500A 100A 500A Balanced MC Series
• Modified TO-220 C Pin 1-2, 3-2, 1-3: 130-420 Pin 1-2, 3-2, 1-3: 180-600 500A 100A 400A • • Q2L Series 3x3 QFN A 6 - 320 25 - 400 150A 45A 150A
• •B 250A 80A 250A 3.3x3.3 QFN C 500A 100A 400A MC Multiport Series
• MS-013 C 6 - 320 25 - 400 500A 100A 400A • • TwinChip™ Protectors DO-214AA A 220 - 640 300 - 800 150A 45A 150A
• • B 250A 80A 250A
• DO-15 A 220 - 320 300 - 400 50A B 80A SDP Series 3x3 QFN F 8 - 24 15 - 35 50A • •
• SOT23 - 5 B 58 - 320 77 - 400 250A 80A 250A • • SDP Biased Series • 5x6 QFN C 6 - 320 25 - 400 500A 100A 400A • • SEP Biased Series • 5x6 QFN C 6 - 75 25 - 98 500A 100A 400A • • P0080T023G5 • SOT 23 - 5 G 8 15 45A 18A 50A • • Subscriber Line Interface Circuit (SLIC) Protection: Fixed Voltage Series
• • DO-214AA A 58 - 160 77 - 200 150A 45A 150A
• • C 500A 100A 400A Fixed Voltage Twin SLIC Series
• • Modified DO-214AA A 58 - 160 77 - 200 150A 45A 150A • • Fixed Voltage Q2L Series
• • QFN 3.3x3.3 C 58 - 160 77 - 200 500A 100A 400A • • Fixed Voltage Single Port Series
• • MS-012 F 58 - 95 77 - 130 120A 30A 100A • • Fixed Voltage Enhanced Single Series • • MS-012 F 58 - 160 77 - 200 120A 30A 100A • • Fixed Voltage Multiport Series
• • MS-013 A 58 - 160 77 - 200 150A 45A 150A
• • C 500A 100A 400A Battrax® Protectors Positive/Negative
• • Modified DO-214AA A These devices track their reference voltages. Please refer to data sheets in SIDACtor® Protection Thyristor catalog or www.littelfuse.com for detailed information. 150A 45A 150A
• • C 500A 100A 400A Battrax® Protectors Single Port Negative
• • MS-013 C 500A 100A 400A • • Battrax® Protectors Single Port Positive/Negative
• • MS-013 C 500A 100A 400A • • Battrax® Protectors Dual Port Negative
• • MS-013 C 500A 100A 400A • •

littelfuse.com Series Name Photo View Datasheet Order Samples Package Type Type Standoff (working) Voltage (VDRM) Switching Voltage (VS) Peak Pulse Rating: RoHS Compliant UR Recognized 2/10µs 10/1000µs 8/20µs Line Circuit Access Switch (LCAS) Protection: Asymmetrical Multiport Series

• • MS-013 A These products have asymmetric trigger voltages. See data sheet. 150A 45A 150A
• • C 500A 100A 400A Custom LCAS Discrete Series
• • DO-214AA A 100 - 230 130 - 290 150A 45A 150A
• •B 250A 80A 250A C 500A 100A 400A Baseband Protection (Voice-DS1): SIDACtor® Protection Thyristors
• • DO-214AA A 6 - 320 25 - 400 150A 45A 150A
• •B 250A 80A 250A C 500A 100A 400A DO-214AC (SMA) A 6 - 320 25 - 400 150A 50A 150A • •
• • TO-92 A 6 - 320 25 - 400 150A 45A 150A
• •B 250A 80A 250A C 500A 100A 400A
• • DO-15 A 90 - 320 130 - 400 45A
• •B 80A
• • Modified TO-220 A Pins 1-2,3-2: 25-275 Pins 1-3: 50-550 Pins 1-2,3-2: 40-350 Pins 1-3: 80-700 150A 45A 150A
• •B 250A 80A 250A C 400A 100A 400A SIDACtor® Protection Thyristors Multiport Series
• • MS-013 6-320 Pins 1-3,4-6: 12-640 25-400 Pins 1-3,4-6: 50-800 150A 45A 150A • • C 500A 100A 400A • • SIDACtor® Protection Thyristors Balanced Series
• MS-013 C 130 - 420 180 - 600 500A 100A 400A • •
• Modified TO-220 A Pins 1-2, 3-2: 130-420 Pins 1-3: 130-420 Pins 1-2, 3-2: 180-600 Pins 1-3: 180-600 150A 45A 150A
• •B 250A 80A 250A C 400A 100A 400A SIDACtor® Protection Thyristors Balanced Multiport Series
• • MS-013 A 130 - 420 180 - 600 150A 45A 150A
• • B 250A 80A 250A C 500A 100A 400A Asym. A6 Pins 1-2,2-3,4-5,5-6: 170-400 Pins 4-6,1-3: 50-270 250-550 Pins 4-6,1-3: 80-340 150A 45A 150A Asym. B6 250A 80A 250A Asym. C6 500A 100A 400A T10A Series
• • DO-15 A 50 - 245 84 - 370 50A 100A • • T10B Series
• • DO-201 B 80 - 275 120 - 360 100A 250A • • High Exposure Surge Protection: Primary Protection Series
• • Modified TO-220 C Pins 1-2,3-2: 25-275 Pins 1-3: 50-550 Pins 1-2,3-2: 40-350 Pins 1-3: 80-700 500A 100A 400A • • Primary Protection Balanced Series
• • Modified TO-220 C Pins 1-2, 3-2: 130-420 Pins 1-3: 130-420 Pins 1-2, 3-2: 180-600 Pins 1-3: 180-600 500A 100A 400A • • 5kA Series
• • TO-218 E 140 - 180 180 - 260 5000A • • High Surge Current Series DO-214AA D 6 - 320 25 - 400 1000A 200A 800A • • sidACtor® PRoteCtioN thYRistoRs (continued)

Switching Thyristors are solid state switches that are normally open circuits (very high impedance), capable of withstanding rated blocking/off-state voltage until triggered to on state. Used for circuit control applications, Littelfuse offers Triac, QUADRAC® Semiconductors, SCRs, Rectifiers plus Alternistor Triacs for best commutating and noise immunity. Offered in various and other configurations for a wide range of currents blocking/off-state voltages, packages, and triggering. Other:Through-Hole Packages: DO-15 TO-92-2L TO-92-3L TO-251 TO-220 TO-218 TO-218X TO3 Fastpak Surface Mount Packages: SOT-89 SOT-223 Compak DO-214AA TO-252 TO-263 IT(RMS) VDRM/VRRM IGT (Q1) Series Through-Hole Surface Mount Sensitive View Datasheet Order Samples Standard View Datasheet Order Samples Alternistor View Datasheet Order Samples TO-92 TO-251 TO-220 Isl TO-220 Non-Isl TO-218 Isl TO-218X Isl TO-3 Compak SOT-223 TO-252 TO-263 T riac: 0.8A 400-600V 3-25mA LxX8Ex LxXx • • QxX8Ex QxXx • • • • 1.0A 3-25mA Lx01Ex,LxNx • • Qx01Ex,QxNx • • • • 1.0A 400-800V 3-10mA L01 • • • • 400-1000V 6A 5-50mA Lxx06xx • • Qxx06xx • • Qxx06xHx • • • • • • • 8A 5-50mA Lxx08xx • • Qxx08xx • • Qxx08xHx • • • • • • • 10A 25-50mA Qxx10xx • • Qxx10xHx • • • • • 12A 10-50mA Qxx12xHx • • • • • 15A & 16A 10-80mA Qxx15xx • • Qxx16xHx • • • • • 25A 600V 50mA HQ6025xH5 • • • • • • 30A & 35A 400-800V 50mA Qxx35xx • • Qxx35xHx • • • • • • 40A 400-1000V 50-100mA Qxx40xx • • • • QUADRAC® Semiconductors: 400-600V 4-15A QxxxxLT QxxxxLTH •

littelfuse.com IT(RMS) VDRM/VRRM IGT (Q1) Series Through-Hole Surface Mount Sensitive View Datasheet Order Samples Standard View Datasheet Order Samples TO-92 TO-251 TO-220 Isl TO-220 Non-Isl TO-218AC Isl TO-218AC Non-Isl TO-218X Isl TO-218X Non-Isl Compak SOT-89 SOT-223 TO-252 TO-263 SCR: 0.8A 400-600V 12 - 500µA EC103xx SxSx • • • • 0.8A 400-800V 5 - 200µA SxX8xSx • • • • • 400-600V 10mA Sx01E SxN1 • • • • 1.5A 200µA TCR22-x • • • 1.5A 200µA Sx02xS • • • • 4A 50- 500µA Sxx04xSx • • • • 400-1000V 0.2-15mA Sxx06xSx • • Sxx06x • • • • • • 8A 0.2-15mA Sxx08xSx • • Sxx08x • • • • • • 10A 0.2-15mA Sxx10xSx • • Sxx10x • • • • • • 12A 20mA Sxx12x • • • • • 15A & 16A 30mA Sxx15x 20A & 25A 30-35mA Sxx20x Sxx25x 35A 40mA Sxx35x • • • • 40A 40mA Sxx40x • • • • 65A 50mA Sxx65x • • • • 70A 50mA Sxx70x • • • Series Through Hole Surface Mount Switching VBO IH ITSM static dv/dt di/dt TJ Standard View Datasheet Order Samples High Energy View Datasheet Order Samples Multipulse View Datasheet Order Samples SIDAC: Kxxxzy • • DO-15,TO-92 DO-214AA 79-330V 150mA 20A 1500V/µs 150A/µs -40 to +125 °C Kxxx0yH • • DO-15,TO-92 DO-214AA 190-280V 150mA 20A 150A/µs -40 to +125 °C K2xx0GHU • • DO-15 190-260V 60mA 220A/µs -40 to +125 °C Kxxx1G • • DO-15 200-380V 120mA 150A/µs -40 to +125 °C Series View Datasheet Order Samples Through Hole IF(RMS) RMS forward current IF(AV) Average forward current IFSM Peak non-repetitive surge current I t I t Value for fusing Tstg Storage temperature range TJ Rectifiers: Dxx15L Dxx20L Dxx25L

• TO-220 Isl. 15 - 25A 9.5 to15.9A single half cycle; f = 50Hz; TJ (initial) = 25°C 188 - 300A single half cycle; f = 60Hz; TJ (initial) = 25°C 225 - 350A 210 - 508 A s -40 to +150 °C -40 to +125 °C sWitChiNg thYRistoRs (continued)

What is the threat or circuit action that may damage sensitive electronics? Typical

Applications

protection from this damage? Principal Protection Criteria What are the characteristics required of the circuit protection technology? Littelfuse Protection Technologies Which circuit protection technologies best serve these types of situations? Overcurrent / Ground Faults Systems that are grounded and/or in near proximity to AC power lines Proper interrupting rating, current carrying capability and voltage rating Fuses and/or PTCs Lightning Any electronic or electrical equipment with connections to the outside environment Fast response, proper switching threshold, surge current rating SIDACtor® Protection Thyristors, Varistors (MOVs), TVS Diodes, Gas Discharge Tubes (GDTs) Electrostatic Discharge (ESD) Any electronic equipment with a human interface Fast response, high peak voltage rating PulseGuard® ESD Suppressors, TVS Diode Array – SPA® Diodes, Multi-Layer Varistors (MLVs) PLED Bypass Protectors Electrical Fast Transients (EFT) Any system that has inductive loads Fast rise time and recovery for repetitive pulses TVS Diodes, Varistors (MLVs and MOVs), TVS Diode Array – SPA® Diodes Inductive Load Switching and Commutative Spikes Large motors, pumps, compressors, relays and AC distribution High energy rating Varistors (MOVs and MLVs), GDTs, TVS Diodes Data and Communication Line Voltage Transients Ethernet, xDSL, data bus, telecom, etc. Fast response, low load capacitance TVS Diode Array – SPA® Diodes, SIDACtor® Protection Thyristors Current Switching / Diversion Wide range of electrical and electronic circuits Proper blocking voltage and current carrying capacity Switching Thyristors, PLED Bypass Protectors Common Circuit Threats and Protection Solutions

littelfuse.com oVeRCuRReNt eVeNts Excessive current events can lead to catastrophic failures in electronic circuits. These failures can result in safety hazards such as fire, shock, or explosion. Common types of overcurrent threats include: overload Overloads occur when more current is allowed to flow through a circuit path than it was designed to carry. This excess current can generate and accumulate heat and result in complete circuit destruction and possible fire, electrocution or explosion. Sources of overload can include:

• Construction hazards cutting across power mains
• Equipment failure in the power grid
• Environmental hazards on the power grid
• Short spikes of energy within the circuit as a result of turning equipment on or off short Circuit Short circuits occur when one conducting path comes in contact with another conducting path or with ground, such as may occur due to a loose wire, insulation breakdown, or contact with water. These conditions can increase the likelihood of arcs, shock, or fire hazards. The principal forms of protection against overcurrent conditions include fuses and resettable positive temperature coefficient (PTC) thermistors. Their function is to limit current to acceptable levels and prevent catastrophic events, and during acceptable conditions act dormant with a minimal amount of resistance to the circuit. Fuses will completely stop the flow of current when opened, which may be desired with sensitive, expensive or critical applications. PTCs offer the ability to re-set for withstanding most minor, common and recurring overcurrent events. They will allow safe levels of current to pass continuously, and during major overcurrent events, increase in resistance as they heat, to restrict the flow of current. When the overcurrent event ends, the device resets to its normal operating state. VoLtAge tRANsieNt eVeNts Voltage transients are short duration surges or spikes. Unsuppressed, they may damage circuits and components, and result in complete system failure. Below are descriptions of common types of voltage transients, and technologies to reduce their effects: electrostatic discharge (esd) Damage from ESD is generally caused by the transfer of static electrical charge from a body to an electronic circuit. It may result in faulty circuit operation, latent defects, and even catastrophic failure of sensitive components. ESD suppressors must have very fast response times and handle high peak voltages and currents for short durations. Littelfuse offers a range of PulseGuard ® ESD suppressors, Multi-Layer Varistors (MLVs) and TVS Diode Array – SPA® Diodes that are designed to suppress these types of events. inductive Load switching Switching of inductive loads, such as those that occur with transformers, generators, motors, and relays, can create transients up to hundreds of volts and amps, and can last as long as 400 milliseconds, affecting both AC and DC circuits. For these applications, commonly used suppressor devices include Metal Oxide Varistors (MOVs), Gas Discharge Tubes (GDTs), and Transient Voltage Suppression (TVS) Diodes. Lightning induced transient Most transients induced by nearby lightning strikes result in an electromagnetic disturbance on electrical and communication lines connected to electronic equipment. Devices that protect against these transients must have a fast response time and must be able to dissipate a large amount of energy. Littelfuse Metal Oxide Varistor (MOV), TVS Diodes and GDT products are typically used to protect against these events. Look to Littelfuse SIDACtor ® Protection Thyristors and TVS Diode Array – SPA® Diode products for Telecom/Datacom requirements (see page 22). Automotive Load dump Load dump refers to what happens to the supply voltage in a vehicle when a load is removed. If a load is removed rapidly (such as when the battery is disconnected while the engine is running), the voltage may spike before stabilizing and damage electronic components. In a typical 12V circuit, load dump can rise as high as 120V and take 400 ms to decay—more than enough to cause serious damage. Littelfuse offers a wide range of TVS Diode and Multi-Layer Varistor (MLV) products designed to protect against these types of events.

CoNsumeR eLeCtRoNiC PRoduCt APPLiCAtioNs Computers—Server, Notebook, Ultrabook, Desktop Handheld Portables —Smart Phone, Tablet, eReader, PND/GPS, MP3/PMP, Digital Camera/Camcorder Consumer A/V Equipment —LCD/LED TV, set top box, DVD player Peripherals—Scanner, Printer, Monitor, Disk Drive Circuit Type Function or Threat Standards Littelfuse Product Series Medium/Low-Speed Data Interfaces: usb 1.1, ethernet, Rs-232, Rs-485, Keypads, Audio, Analog Video ESD, EMI, EFT IEC61000-4-2 IEC61000-4-4 TVS Diode Array SPA® Diodes sP05x, sP10xx, sP40xx, LC03, sP72x, sP03-xx, sLVu2.8, sLVu2.8-4 Varistor (MLV) mLA, mLe, mLN, mhs SIDACtor® Protection Thyristors PxxxxsA/sb/sC, PxxxxQ12/Q22 TVS Diodes smF, smAJ, smA6L, smbJ, smCJ, smdJ Overcurrent PTCs 0603L, 0805L, 1206L, 1210L, 1812L, 2920L High-Speed Data Interfaces: USB 2.0/3.0, HDMI, eSATA, DisplayPort, DVI, IEEE 1394, RF Antenna ESD, EMI, EFT IEC61000-4-2, IEC61000-4-4 PulseGuard® ESD Supressor Pgb1, Pgb2 - 0201, 0402, 0603 TVS Diode Array SPA® Diodes sP30xx, sP40xx, sP0524P , sP0504s Overcurrent LoRho PTCs sL smt series 0402L, 0603L, 0805L, 1206L, 1210L, 1812L Power Inputs: 120/240 VAC Lightning IEC61000-4-5 TVS Diode smF, smAJ, smA6L, smbJ, smCJ, smdJ, P4Ke, P6Ke, 1.5Ke Varistor (MOV) LA, ultramoV™, C-iii, tmoV® varistors Overcurrent Fuse smd: Nano2®, Fuse, PiCo® smd fuses Leaded: 2Ag, 3Ab/3Ag, 5x20, 3.6x10, tR5 ®/te5 fuses Power Inputs: blade dC input, Low voltage dC, Li-ion battery Lightning / ESD IEC61000-4-2, IEC61000-4-5 TVS Diode smF, smAJ, smA6L, smbJ, smCJ, smdJ, P4Ke, P6Ke, 1.5Ke Varistor (MLV) mL, mLe Varistor (MOV) ZA Overcurrent Fuse smd - thin Film, Ceramic, Chip, Nano2®, (1206 size), 501 (20A), 456 (40A) fuses LoRho PTC sL smt series 0402L, 0603L, 0805L, 1206L, 1210L, 1812L

littelfuse.com Circuit Type Function or Threat Littelfuse Product Series Universal / DC Motors (intermittant use) Speed Control Thyristor triac: Q6016Lh4 sCR: s6025L Rectifier: d6025L AC Induction Motors (continuous use) Speed Control Thyristor triac: Q6012Lh4 Thyristor Overvoltage Protection Varistor (MOV) LA, sm20 TVS Diode smbJ, P4Ke, P6Ke, 1.5Ke eLeCtRiC motoRs* * Littelfuse offers protection solutions to serve a wide range of electric motors, controllers and power systems. Please consult with your Littelfuse products representative for detailed discussion about your requirements. For higher power and industrial applications, please refer to our POWR-GARD® division product catalogs (www.littelfuse.com/catalogs). Circuit Type Function or Threat Littelfuse Product Series type 1 (Power before the panel) Surge Protective Devices (SPD) (Primary building entrance, electric meters) Lightning Varistor (MOV) tCmoV®, smoV™, tmoV®, ultramoV™, LA, C-iii, hA, hb34, hF34, hg34 varistors type 2 (Permanently connected devices after the panel) Uninterruptible Power Supply (commercial/industrial) Surge Protective Devices (SPD) (building level equipment, load-center panels, datacenters) Power Inverters Lightning, Switching Transients Varistor (MOV) tCmoV®, smoV™, tmoV®, ultramoV™, LA, C-iii, hA, hb34, hF34, hg34 varistors TVS Diode 5KP , 15KPA, 20KPA, 30KPA, AK1, AK3, AK6, AK10, AK15 GDT AC120, AC240 Power Fault / Short Circuit and other themal events Fuse PoWR-gARd® midget fuses LVsP series (moV protection) type 3 (Plug-in equipment after the panel) Uninterruptible Power Supply (consumer/residential) External Power Supplies (chargers, peripheral devices, etc) Consumer Electronics AC Appliances AC Power Strips Switch Mode Power Supplies Lightning, Switching Transients Varistor (MOV) tmoV®, ultramoV™, LA, C-iii, hA, hb34, hF34, hg34 varistors TVS Diode 5KP , 15KPA, 20KPA, 30KPA, AK1, AK3, AK6, AK10, AK15 GDT Cg3 4.0 Power Fault / Short Circuit and other themal events Fuse thru hole: tR5® / te5, 2Ag, 3Ag, 5x20, 3.6x10, PiCo® fuses surface mount: Nano2®, PiCo® smd fuses PoWeR mAiNs / AC LiNe PRoteCtioN* Circuit Type Function or Threat Littelfuse Product Series LED Lighting Systems Improved LED String Reliability PLED devices PLedxx Power Supply (Lightning, Inductive Load Switching) Varistor (MOV) tmoV®, ultramoV™, Ch, LA, C-iii varistors TVS Diode smbJ, P4Ke, P6Ke, 1.5Ke, 5KP , 15KPA, 30KPA, AK1, AK3, AK6, AK10, AK15 Power Fault / Short Circuit and other themal events Fuse thru hole: tR5® / te5, 2Ag, 3Ag, 5x20, 3.6x10, PiCo® fuses surface mount: Ceramic Chip, Nano2®, PiCo® smd (high Voltage) 477 series, 505 series, 808 series, 485 series fuses Light Dimmers Phase Control Thyrsitor triacs / Alternistor triacs: Q6010Lx, Q6016Lx, Q6025Lx QuAdRAC® semiconductors: Q6010Lt, Q6015Lt Overcurrent (Europe) Fuse 3.6x10 Electronic Fluorescent Lighting Ballasts Lightning Varistor (MOV) LA Overcurrent Fuse 383 tR series / 369 tR5® series, 446 / 447 ebF fuse Compact Fluorescent Lamps (CFL) Overcurrent Fuse 3.6x10 Metal Halide Lighting Lamp Ignition Thyristor multipulse sidac: K2401g High Pressure Sodium Lighting Lamp Ignition Thyristor sidac: K1200g LightiNg sYstems

Application Solutions by Circuit Type and Related Threat (continued) Circuit Threat Standards Littelfuse Product Series Medium/Low-Speed Data Interfaces: usb 1.1, Rs-232, Rs-485, Keypads, Audio, Analog Video ESD, EMI, EFT IEC61000-4-2, IEC61000-4-4 TVS Diode Array SPA® Diodes sP05x, sP10xx, sP40xx, sP72x, sP03-xx, sLVu2.8, sLVu2.8-4 Varistor (MLV) mL, mLe, mLN, mhs TVS Diodes smF, smAJ, smA6L, smbJ, smCJ, smdJ Overcurrent PTCs 0805L, 1206L, 1210L, 1812L High-Speed Data Interfaces: USB 2.0/3.0, HDMI, eSATA, DisplayPort, DVI, IEEE 1394, RF Antenna ESD, EMI, EFT IEC61000-4-2, IEC61000-4-4 PulseGuard® ESD Suppressor Pgb1, Pgb2 - 0201, 0402, 0603 TVS Diode Array SPA® Diodes sP30xx, sP40xx, sP0524P , sP0504s Overcurrent PTCs 0805L, 1206L, 1210L, 1812L Overvoltage IEC61000-4-5, GR-1089, ITU-7 K.12 GDTs sg, sL0902A SLICs (Subscriber Line Interface Circuits): CO sites, Remote Cabinets/Terminals, VoIP systems, FXS ports Lightning GR-1089, TIA-968-A/B, ITU K.20/.21/.45, UL/EN/IEC 60950-1, UL 497B, IEC 61000-4-5, YD/T-993 SIDACtor® Protection Thyristors Pxxx1 Fixed Voltage sLiC Protectors bxxxx battrax ® Programmable sLiC Protectors Power Fault Fuses teleLink® 461 PTCs 600R150 Low-Speed Circuits: Voice, Fax, modem, FXo / dAA Lightning GR-1089, TIA-968-A/B, ITU K.20/.21/.45, UL/EN/IEC 60950-1, UL 497B, IEC 61000-4-5, YD/T-993 SIDACtor® Protection Thyristors Pxxxx sidACtor® Protectors sdP series low profile sidACtor® Protectors GDTs sL0902A, sL1002A, sL1003A, sL1011A, sL1024A Power Fault Fuses teleLink® 461 fuse PTCs 600R150 Medium-Speed Circuits: t1/e1/J1/ds1, t3/e3/ds3 Lightning GR-1089, TIA-968-A/B, ITU K.20/.21/.45, UL/EN/ IEC 60950-1,UL 497B, IEC SIDACtor® Protection Thyristors PxxxxxxmCL sidACtor® Protectors Pxxx2xxmCL twinChip™ Protectors PxxxxQxx QFN sidACtor® Protectors, sdP , seP series low profile sidACtor® Protectors, sdP023t TVS Diode Array SPA® Diodes sRV05-4, sP4060, sP2504N, sP3304N, sP2502L, LC03, sP03-xx GDTs sL0902A, sL1002A, sL1003A, sL1011A, sL1024A Power Fault Fuses teleLink® 461 / 461e fuses PTCs 600R150, 250s, 250R Ethernet: 10/100/1000baset Lightning GR-1089, TIA-968-A/B, ITU K.20/.21/.45, UL/EN/ IEC 60950-1, UL 497B, YD/T-993, IEEE 802.3, IEC61000-4-5 SIDACtor® Protection Thyristors sdP , seP series low profile sidACtor® Protectors GDTs sL0902A, sL1002A, sL1003A, sL1011A, sL1024A TVS Diode Array SPA® Diodes sP30xx, sP40xx, LC03, sLVu2.8, sLVu2.8-4, sRV05-4, sP2504N, sP3304N, sP2502L, sP03A-3.3 Power Fault Fuses teleLink® 461 fuse PTCs 600R150, 250s, 250R ESD IEC 61000-4-2 TVS Diode Array SPA® Diodes sP30xx, sP0524P , sP0504s xDSL: AdsL, AdsL2, hdsL, VdsL, VdsL2 Lightning GR-1089, TIA-968-A/B, ITU K.20/.21/.45, IEC 61000-4-5, YD/T-993, IEEE 802.3 SIDACtor® Protection Thyristors sdP sidACtor® Protectors, sdP023t TVS Diode Array SPA® Diodes sR70 Primary Protection Lightning and Power Fault UL497 GR-974 UL/EN/IEC 60950-1 GDT sL0902A, sL1002A, sL1003A, sL1011A, sL1024A, sL1411A, sL1021A, sL1122A Power Inputs: 120/240 VAC, up to

120 VdC, AtCA

TVS Diode P4Ke, P6Ke, 1.5Ke, AK1, AK3, AK6, AK10, AK15 Varistor (MOV) Ch, ZA, ultramoV™ varistors Fault Current Fuse midget series (sFe, KlK, KLKd, bLs, bLN, FLQ, FLm, FLA, KLQ) Fast Acting: 435, 431/434, 429/433, 271, 446, 445, 451/453, 456, 459 slo-blo ® fuses: 430, 452 / 454, 461, PiCo® ii fuses teLeCom/dAtACom

littelfuse.com Circuit Type Function or Threat Standards Littelfuse Product Series High-Speed Interfaces: USB 2.0, IEEE 1394 ESD IEC61000-4-2 PulseGuard® ESD Suppressor Pgb1, Pgb2 - 0201, 0402, 0603 TVS Diode Array SPA® Diodes sP30xx, sP0524P , sP0504s Medium/Low-Speed Interfaces: USB 1.1, CAN ESD, EMI IEC61000-4-2 TVS Diode Array SPA® Diodes sP05x, sP72x, sP10xx Varistor (MLV) mL, mLe, mLN, mhs Power Inputs: Up to 42 VDC Fault Currents RoHS; ISO 7637; GM 9105; Various UL, CSA, IEC, MITI Fuse blade / terminal Fuse series: 257, 297, 298, 299, 495, 498 (see automotive products catalogs) Load Dump and Inductive Switching — Varistor (MLV) AumL, mLA, mLe, mhs TVS Diode (AEC-Q101) tPsmA6L Varistor (MOV) Ch, ZA AutomotiVe eLeCtRoNiCs* Engine/Body/Chassis Controllers — Anti-lock brake / steering / air bag / seat belt / collision control and other safety systems and sensors, lighting / signalling controls, instrument cluster, engine / emission controllers, window / wipers controls, door lock / security controls, seating sensors and controllers Multimedia/Information Systems — In-dash stereo / GPS / climate control electronics, portable GPS, portable CD/DVD/media players, audio / video / data / power docks and inputs Circuit Type Function or Threat Littelfuse Product Series AC Induction Motor On / Off / Speed Control Switching Thyristor Alternistor t riac AC Shaded Pole Motor Fan On / Off / Speed Control Switching Thyristor eV series triac AC Solenoid Valve / Lock On / Off Switching Thyristor eV series triac Spike Suppression Varistor (MOV) LA Brushless DC Motor Drive DC Supply Protection TVS Diode 1.5K e / 1.5smC Display / Touchscreen ESD Protection Varistor (MLV) mL Gas Ignitor Free-Running Oscillator Switching Thyristor K2xxxy h series sidAC Micro-controller Fired Switching Thyristor eC series sCR Heating Element On / Off / Variable Switching Thyristor hQ series high temp triac Incandescent Bulb On / Off / Dim Switching Thyristor L-series triac LED Indicator / Light ESD Protection Varistor (MLV) mL MicroController I/O ESD Protection Varistor (MLV) mL Sensor ESD Protection Varistor (MLV) mL Switch-Mode Power Supply AC Input Overcurrent Fuse Cartridge 215, 218, 877, PiCo® ii, tR / te 392, 382 fuses Input Overvoltage Varistor (MOV) LA Output Overcurrent Fuse 477, 977, 505 h V dC Cartridge, te 808 h V dC,

485 Nano 2® fuses

Output Overvoltage TVS Diode 1.5K e / 1.5smC Touch Keypad ESD Protection Varistor (MLV) mL TVS Diode Array – SPA® Diodes sP10xx Triac Control Overvoltage Protection TVS Diode 1.5K e / 1.5smC Varistor (MOV) LA Wax Motor Latch / Lock On / Off Switching Thyristor eV series triac White goods / APPLiANCes * Littelfuse offers a wide range of solutions designed to serve the requirements of automotive, truck, and off-road vehicle applications. Please refer to our automotive products catalogs (www.littelfuse.com/catalogs) and your Littelfuse products representative for detailed discussion about your requirements.

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