Resettable PPTC Datasheet 250R Series Radial Leaded RoHS Description T he 250R Series is designed to protect against short duration high voltage fault currents (power cross or power induction surge) typically found in telecom applications (250Vrms). The series can be used to help telecom networking equipment meet the protection requirements specified in ITU K.20 and K.21. Features 0.08 0.1 8 hold current Binned and sorted narrow range, 60VDC operating resistance ranges available voltage RoHS-compliant, Lead-Free 250VAC interrupt rating and Halogen-Free* Fast timeto-trip Additional Information Applications Customer Premises LAN/WAN equipment Equipment (CPE) Access equipment Central Of fice (CO)/ telecom centers Resources Accessories Samples Agency Approvals Agency Agency File Number E183209 R50120008 Electrical Characteristics Maximum Time To Trip Resistance Agency Approvals I I V I P hold trip max max d Part Number (A) (A) V / V (A) typ. (W) Current (A) Time (Sec.) R () R () R () int op min typ 1max 250R080 0.08 0.16 250/60 3 1 0.35 4.0 14 22 33 X X 250R120 0.12 0.24 250/60 3 1 1 2.5 4 8 16 X X 250R120-RA 0.12 0.24 250/60 3 1 1 2.5 7 9 16 X X 250R120-RC 0.12 0.24 250/60 3 1 1 3.0 5.4 7.5 14 X X 250R120-R2 0.12 0.24 250/60 3 1 1 2.5 8 10.5 16 X X 250R145 0.145 0.29 250/60 3 1 1 2.5 3 6 14 X X 250R180 0.18 0.65 250/60 10 1.8 1 20 0.8 2.2 4 X X Note: Items with T at end of part number = pre-tripped device. See Part Ordering Number System section of this data sheet for additional information. I = Hold current: maximum current device will pass without tripping in 20C still air. R = Minimum resistance of device in initial (un-soldered) state. hold min I = Trip current: minimum current at which the device will trip in 20C still air. R = Typical resistance of device in initial (un-soldered) state. trip typ V = Maximum voltage the device can withstand without damage at rated current (I max) R = Maximum resistance of device at 20C measured one hour after tripping. int 1max V = The device regular operation voltage op * Effective February 11, 2010 onward, all 600R PTC products will be manufactured Halogen Free (HF). Existing I = Maximum fault current device can withstand without damage at rated voltage (V ) max max Non-Halogen Free 600R PTC products may continue to be sold, until supplies are depleted. This change will P = Power dissipated from device when in the tripped state at 20C still air. d have no effect on 600R product specifications or performance. Warning Users shall independently assess the suitability of these devices for each of their applications Operation of these devices beyond the stated maximum ratings could result in damage to the devices and lead to electrical arcing and/or fire These devices are intended to protect against the effects of temporary over-current or over-temperature conditions and are not intended to perform as protective devices where such conditions are expected to be repetitive or prolonged in duration Exposure to silicon-based oils, solvents, electrolytes, acids, and similar materials can adversely affect the performance of these PPTC devices These devices undergo thermal expansion under fault conditions, and thus shall be provided with adequate space and be protected against mechanical stresses Circuits with inductance may generate a voltage (L di/dt) above the rated voltage of the PPTC device. 2021 Littelfuse, Inc. 1 Specifications are subject to change without notice. Revised: GD. 05/07/21Resettable PPTC Datasheet 250R Series Radial Leaded Temperature Rerating Ambient Operation Temperature -40C -20C 0C 20C 40C 50C 60C 70C 85C Part Number Hold Current (A) 250R080 0.12 0.11 0.09 0.08 0.06 0.05 0.05 0.04 0.03 250R120 0.18 0.16 0.14 0.12 0.10 0.09 0.08 0.06 0.05 250R145 0.26 0.20 0.17 0.145 0.12 0.11 0.09 0.08 0.06 250R180 0.28 0.23 0.21 0.18 0.16 0.13 0.10 0.11 0.083 Average Time Current Curves Temperature Rerating Curve 1000 170% 150% 100 130% 10 110% 90% 1 70% B A 0,1 C D 50% 0,01 30% 10% 0,001 0,1 110 -40 -30 -20 -100 10 20 30 40 50 60 70 80 Fault Current (A) Temperature (C) The average time current curves and Temperature Rerating curve performance is affected by a number Note: Typical Temperature rerating curve, refer to table for derating data or variables, and these curves provided as guidance only. Customer must verify the performance in their application. Curve Designation I (A) hold A 0.18 B 0.145 C 0.12 D 0.80 2021 Littelfuse, Inc. 2 Specifications are subject to change without notice. Revised: GD. 05/07/21 Time to trip (sec) Percentage of Rated Current