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Technical content

Features

Applications

  • 0.08 – 0.18 hold current range, 60VDC operating voltage
  • 250VAC interrupt rating
  • Fast time–to-trip
  • Binned and sorted narrow resistance ranges available
  • RoHS compliant, Lead- Free and Halogen-Free*
  • Customer Premises Equipment (CPE)
  • Central Office (CO)/ telecom centers
  • LAN/WAN equipment
  • Access equipment Agency Approvals I hold = Hold current: maximum current device will pass without tripping in 20°C still air. I trip = Trip current: minimum current at which the device will trip in 20°C still air. Vint = Maximum voltage the device can withstand without damage at rated current (I max) Vop= The device regular operation voltage I max = Maximum fault current device can withstand without damage at rated voltage (Vmax) P d = Power dissipated from device when in the tripped state at 20°C still air. R min = Minimum resistance of device in initial (un-soldered) state. R typ = Typical resistance of device in initial (un-soldered) state. R 1max = Maximum resistance of device at 20°C measured one hour after tripping. Caution: Operation beyond the specified rating may result in damage and possible arcing and flame. * Effective January 1, 2010, all 250R PTC products will be manufactured Halogen Free (HF). Existing Non-Halogen Free 250R PTC products may continue to be sold, until supplies are depleted. RoHS * 250R Series AGENCY AGENCY FILE NUMBER E183209 R50120008

© 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/22/17 Radial Leaded > 250R Series Ambient Operation Temperature -40°C -20°C 0°C 20°C 40°C 50°C 60°C 70°C 85°C Part Number Hold Current (A) T emperature Rerating T emperature Rerating Curve -40 -30 -20 -100 10 20 30 40 50 60 70 80 10% 30% 50% 70% 90% 110% 130% 150% 170% Temperature (°C) Percentage of Rated Current Average Time Current Curves The average time current curves and Temperature Rerating curve performance is affected by a number or variables, and these curves provided as guidance only. Customer must verify the performance in their application. Note: Typical Temperature rerating curve, refer to table for derating data 0.01 0.1 100 1000 10000 100000 0.11 10 100 Fault Current in Amperes Resistance (ohm) A B C D Curve Designation Ihold (A) A 0.18 B 0.145 C 0.12 D 0.80 Additional Information Datasheet SamplesResources Samples

© 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/22/17 Radial Leaded > 250R Series Protection Application Guide Region/Specification Application Device Selection South America/Asia/Europe ITU K.45 *Access network equipment Remote terminal Repeaters WAN equipment Cross –connect 250R180 250R180T 250R145 250R145T 250R120 250R120T South America/Asia/Europe ITU K.21 Customer and IT equipment Analog modems ADSL, xDSL Phone sets, PBX systems Internet appliances POS terminals 250R180 250R180T 250R145 250R145T 250R120 250R120T South America/Asia/Europe ITU K.20 Central Office POTS/ISDN linecards T1/E1/J1 linecards ADSL/VDSL splitters CSU/DSU 250R180 250R180T 250R145 250R145T 250R120 250R120T North America Telcordia GR-97 4 *Primary protection modules MDF modules Network interface 250R180 250R180T 250R145 250R145T 250R120 250R120T South America/Asia/Europe ITU K.20 North America Telcordia GR-1089 *Intrabuilding communication systems LAN, VOIP cards Local loop handsets 250R180 250R180T 250R145 250R145T 250R120 250R120T South America/Asia/Europe ITU K.20 and K.21 LAN Intrabuilding power cross Protection LAN equipment, IP phone 250R080 *Resistance binned parts are recommended Agency Specification Selection Guide For T elecom and Networking Applications Product Lightning Power Cross 250R120 250R145 ITU K.20/21/45 – 1 .5kV 10/700μs ITU K.20/21/45 – 4kV 10/700μs* ITU K.20/21/45 – 230Vac, 10Ω ITU K.20/21/45 – 600Vac, 600Ω 250R180 ITU K.20/21/45 – 1 .5kV 10/700μs ITU K.20/21/45 – 4kV 10/700μs* Telcordia GR – 97 4 – 1 .0kV 10/1000μs ITU K.20/21/45 – 230Vac, 10Ω ITU K.20/21/45 – 600Vac, 600Ω Telcordia GR – 97 4- 283Vac, 10A *Devices should be independently evaluated and tested for use in any specific application

© 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/22/17 Radial Leaded > 250R Series Environmental Specifications Operating/Storage T emperature -40°C to +85°C Maximum Device Surface T emperature in T ripped State 125°C Passive Aging 65°C/85°C, 1000 hours Humidity Aging +85°C, 85% R.H,.1000 hours Thermal Shock MIL–STD–202, Method 107 +125°C to -55°C 10 times Solvent Resistance MIL–STD–202, Method 215 Moisture Sesitivity Level Level 1, J–STD–020 Physical Specifications Lead Material Tin-plated Copper Soldering Characteristics Solderability per MIL–STD–202, Method 208 Insulating Material Cured, flame retardant epoxy polymer meets UL94V-0 requirements. Device Labeling Marked with 'LF', voltage, current rating, and date code. Soldering Parameters - Wave Soldering Condition Wave Soldering Peak Temp/ Duration Time 260°C < 5 Sec > 220°C 2 Sec ~ 20 Sec Preheat 140°C ~ 180°C 180 Sec ~ 210 Sec Storage Condition 0°C~35°C < 70%RH

  • Recommended soldering methods: heat element oven or N2 environment for lead-free.
  • Devices are designed to be wave soldered to the bottom side of the board.
  • Devices can be cleaned using standard industry methods and solvents.
  • This profile can be used for lead-free device Note: If soldering temperatures exceed the recommended profile, devices may not meet the performance requirements. Preheating 160 190 220 260 2 to 5 Temperature (°C) Soldering Cooling 20-30180 to 210 Time(s) Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.

© 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/22/17 Radial Leaded > 250R Series Part Ordering Number System PACKAGING STYLE R: RADIAL I HOLD CURRENT CODE

250 R 120 - RA Z R

T: PRE-TRIPPED DEVICE (OPTIONAL) QUANTITY CODE: F=200 M=1000 U=500 Z=1200 SERIES PEAK VOLTAGE RATING BLANK: Bulk R: Tape & Ammo Rx: Resistance Range (x = A-Z or 1-9) [not applicable for all parts] (Refer to Packaging or Electrical Characteristics tables) Packaging Part Number Ordering Number I hold (A) I hold Code Packaging Option Quantity Quantity & Packaging Codes 250R080 250R080U 0.080 080 Bulk 500 U 250R080ZR Tape and Ammo 1200 ZR 250R080T 250R080TU 0.080 080 Bulk 500 U 250R080TZR Tape and Ammo 1200 ZR 250R120 250R120U 0.120 120 Bulk 500 U 250R120ZR Tape and Ammo 1200 ZR 250R120-RA 250R120-RAU 0.120 120 Bulk 500 U 250R120-RAZR Tape and Ammo 1200 ZR 250R120-RC 250R120-RCU 0.120 120 Bulk 500 U 250R120-RCZR Tape and Ammo 1200 ZR 250R120-RF 250R120-RFU 0.120 120 Bulk 500 U 250R120-RFZR Tape and Ammo 1200 ZR 250R120-R1 250R120-R1U 0.120 120 Bulk 500 U 250R120-R1ZR Tape and Ammo 1200 ZR 250R120-R2 250R120-R2U 0.120 120 Bulk 500 U 250R120-R2ZR Tape and Ammo 1200 ZR 250R120-R3 250R120-R3U 0.120 120 Bulk 500 U 250R120-R3ZR Tape and Ammo 1200 ZR 250R120T 250R120TU 0.120 120 Bulk 500 U 250R120TZR Tape and Ammo 1200 ZR 250R145 250R145U 0.145 145 Bulk 500 U 250R145ZR Tape and Ammo 1200 ZR 250R145-RA 250R145-RAU 0.145 145 Bulk 500 U 250R145-RAZR Tape and Ammo 1200 ZR 250R145-RB 250R145-RBU 0.145 145 Bulk 500 U 250R145-RBZR Tape and Ammo 1200 ZR 250R145T 250R145TU 0.145 145 Bulk 500 U 250R145TZR Tape and Ammo 1200 ZR 250R180 250R180F 0.180 180 Bulk 200 F 250R180MR Tape and Ammo 1000 MR 250R180T 250R180TF 0.180 180 Bulk 200 F 250R180TMR Tape and Ammo 1000 MR

© 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/22/17 Radial Leaded > 250R Series Dimension EIA Mark IEC Mark Dimensions Dim. (mm) T ol. (mm) Carrier tape width W W 18 –0.5 / +1 .0 Hold down tape width W4 W0 11 min. Top distance between tape edges W6 W2 3 max. Sprocket hole position W5 W1 9 –0.5 / +0.75 Sprocket hole diameter* D0 D0 4 –0.32 / +0.2 Abscissa to plane (straight lead) H H 18.5 –/+ 3.0 Abscissa to plane (kinked lead) H0 H0 16 –/+ 0.5 Abscissa to top H1 H1 32.2 max. Overall width without lead protrusion C1 42.5 max. Overall width with lead protrusion C2 43.2 max. Lead protrusion L1 l1 1. 0 max. Protrusion of cut out L L 11 max. Protrusion beyond hold–down tape l2 l2 Not specified Sprocket hole pitch: 250R080–250R145 P0 P0 12.7 –/+ 0.3 Sprocket hole pitch: 250R180 P0 P0 25.4 –/+ 0.5 Pitch tolerance 20 consecutive. –/+ 1 Device pitch: 250R080–250R145 12.7 Device pitch: 250R180 25.4 Tape thickness t t 0.9 max. Tape thickness with splice t1 2.0 max. Splice sprocket hole alignment 0 –/+ 0.3 Body lateral deviation Δh Δh 0 –/+ 1 .0 Body tape plane deviation Δp Δp 0 –/+ 1 .3 Ordinate to adjacent component lead* P1 P1 3.81 –/+ 0.7 Lead spacing F F 5.1 –/+ 0.7 *Differs from EIA Specification T ape and Ammo Specifications Devices taped using EIA468-B/IE286-2 standards. See table below and Figure 1 for details. T ape and Ammo Diagram A B L1 P0 D0 F L W Reference plane ∆h ∆h H ∆h ∆p Direction of unreeling Cross section A - B t Cross section Optional shape: Circular or polygonal Direction of unreeling Reel Tape Upper side Lower side Figure 1