0434005.NRP LITTELFUSE | Alldatasheet

Document overview

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Technical content

Features

small, low profile design (0603 chip size) utilizing thin-film technology to achieve precise control of electrical characteristics. t5IFMPXFSIFJHIUQSPmMF produces a flat surface for improved performance in pick-and-place operations and an alternate solution for height critical applications.

Applications

® ® % of Ampere Rating Opening Time at 25OC 100% 4 hours, Minimum 200% 5 seconds, Maximum. 300% 0.2 seconds, Maximum The 434 series fast-acting surface mount fuse series is an ultra small (0603 size) thin-film device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. For RoHS compliant and lead-free design, please refer to the Littelfuse 467 series thin film fuse. Ampere Rating (A) Amp Code Max Voltage Rating (V) Interrupting Rating Nominal Cold Resistance (Ohms) Nominal Melting I2t (A2sec) Agency Approvals ® ® 0.250 .250 32 50A @32 V AC/DC 0.3750 0.0030 x x 0.375 .375 32 0.2650 0.0053 x x 0.500 .500 32 0.1903 0.0087 x x 0.680 .680 32 0.1250 0.0109 x x 0.750 .750 32 0.1140 0.0171 x x 1 .00 001 . 32 0.0720 0.0212 x x 1 .25 1 .25 32 35A @32 V AC/DC 0.0540 0.0320 x x 1 .50 01 .5 32 0.0480 0.0526 x x 1 .75 1 .75 32 0.0390 0.0661 x x 2.00 002. 32 0.0360 0.1040 x x 2.50 02.5 32 0.0280 0.1750 x x 3.00 003. 32 0.0230 0.1980 x x 3.50 03.5 32 0.0190 0.2650 x x 4.00 004. 32 0.0170 0.3520 x x 5.00 005. 32 0.0130 1 .2970 x x Electrical Specifications by Item 1 . Measured at 10% of rated current, 25ºC. 2. Measured at rated voltage. t$FMMQIPOFT t#BUUFSZQBDLT t%JHJUBMDBNFSBT t%7%QMBZFST t)BSEEJTLESJWFT Secondary protection for space constrained applications such as:

Revision: February 13, 2008 Surface Mount Fuses ©2008 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for the most current information Thin Film > 0603 Size > Very Fast Acting > 434 Series

434 Series

Average Time Current Curves TIME IN SECONDS CURRENT IN AMPERES 0.01 0.1 0.1 100 10 100 0.001 2.5A 1 .5A .75A .5A .375A .25A 3.5A .68A Reflow Condition Pb – Free assembly Pre Heat - Temperature Min (Ts(min)) 150°C - Temperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) 60 – 180 secs Average ramp up rate (Liquidus Temp (TL) to peak 5°C/second max TS(max) to TL - Ramp-up Rate 5°C/second max Reflow - Temperature (TL) (Liquidus) 217°C - Temperature (tL) 60 – 150 seconds Peak Temperature (TP) 250+0/-5 °C Time within 5°C of actual peak Temperature (tp) 20 – 40 seconds Ramp-down Rate 5°C/second max Time 25°C to peak Temperature (TP) 8 minutes Max. Do not exceed 260°C Soldering Parameters - Wave Soldering T emperature Rerating Curve

Revision: February 13, 2008 Surface Mount Fuses ©2008 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for the most current information Thin Film > 0603 Size > Very Fast Acting > 434 Series 1.09 (.043") REFLOW SOLDER 1.60 (.063") .127 (.005") MARKING CODE VARIES WITH AMPERAGE RATING (SEE CHART) 1.02 (.040") .762 (.030") 2.54 (.100") 1.09 (.043") WAVE SOLDER 3.20 (.126") 1.09 (.043") 1.02 (.040") .813 (.032") .305 (.012") .279 (.011") .254 (.010") Sn/Pb Sn/PbCu Sn/Pb Coating 0434 1.75 NR AMP CODE SERIES QUANTITY CODE Materials Body: Epoxy Substrate T erminations: 100% Tin over Nickel over Copper Element Cover Coat: Conformal Coating Operating T emperature – 55OC to 90OC. Consult temperature rerating curve chart. For operation above 90°C contact Littelfuse. Humidity MIL -STD-202F Method 103B Condition D Thermal Shock Withstands 5 cycles of – 55OC to 125OC Vibration Per MIL -STD-202F Insulation Resistance (After Opening) Greater than 10,000 ohms Resistance to Soldering Heat Withstands 60 seconds above 200OC and up to 260OC, maximum Product Characteristics Dimensions Packaging Part Numbering System Part Marking Packaging Option Packaging Specification Quantity Quantity & Packaging Code 8mm Tape and Reel EIA RS-481-2 (IEC 286, part 3) 5000 NR Amp Code Marking Code .250 D .375 E .500 F .680 X .750 G 001 . H 1 .25 J 01 .5 K 1 .75 L 002. N 02.5 O 003. P 03.5 R 004. S 005. T