250R180TMR Littelfuse

POLYFUSE Resettable PTCs Radial Leaded > 250R Series 250R Series Description The 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 specied in ITU K.20 and K.21. Features t SFOU IPME DVS o t X SP JOOFE BOE TPSUFE OBS range, 60VDC operating resistance ranges available voltage t FBE P)4 DPNQMJBOU - 3 VQU SBUJOH S JOUFS t 7 Free and Halogen-Free* Agency Approvals BTU UJNFoUP USJQ t AGENCY AGENCY FILE NUMBER Applications E183209 t SFNJTFT VTUPNFS 1/ FRVJQNFOU t / 8 R50120008 Equipment (CPE) DDFTT FRVJQNFOU t t mDF 0 FOUSBM 0G telecom centers Electrical Characteristics Maximum Time Agency Resistance P V To Trip Approvals d I I I max hold trip max Part Number typ. (A) (A) (A) R R R V / V Current Time (W) min typ 1max int op (A) (Sec.) () () () 250R080 0.08 0.16 250/60 3 1 0.35 3 14 22 33 XX 250R080T 0.08 0.16 250/60 3 1 0.35 3 15 22 33 XX 250R120 0.12 0.24 250/60 3 1 1 1.5 4 8 16 XX 250R120-RA 0.12 0.24250/60 3 1 1 1.0 7 9 16 XX XX 250R120-RC 0.12 0.24 250/60 3 1 1 0.85 5.4 7.5 14 XX 250R120-RF 0.12 0.24 250/60 3 1 1 0.7 6 10.5 16 XX 250R120-R1 0.12 0.24 250/60 3 1 1 0.8 6 9 16 250R120-R2 0.12 0.24 250/60 3 1 1 0.7 8 10.5 16 XX 250R120-R3 0.12 0.24 250/60 3 1 1 1 8 10 16 XX 250R120T 0.12 0.24 250/60 3 1 1 1.2 7 12 16 XX 250R145 0.145 0.29 250/60 3 1 1 2.5 3 6 14 XX XX 250R145-RA 0.145 0.29 250/60 3 1 1 5 3 5.5 12 XX 250R145-RB 0.145 0.29 250/60 3 1 1 2.5 4.5 6 14 250R145T 0.145 0.29 250/60 3 1 1 2.0 5.4 7.5 14 XX 250R180 0.18 0.65 250/60 10 1.8 1 21 0.8 2.2 4 XX 250R180T 0.18 0.65 250/60 10 1.8 1 20 1.4 3.9 4.5 XX 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 23C 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 23C 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 Caution: Operation beyond the specied rating may result in damage and possible arcing op and ame. I = Maximum fault current device can withstand without damage at rated voltage (V ) max max P = Power dissipated from device when in the tripped state at 23C still air. d * 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. 99 2010 Littelfuse, Inc 250R Series Specications are subject to change without notice. Revised: July 12, 2010 Please refer to www.littelfuse.com/series/250R.html for current information. 250R Series POLYFUSE Resettable PTCs Radial Leaded > 250R Series Temperature Rerating Ambient Operation Temperature -40C -20C 0C 23C 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 250R080T 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 250R120T 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 250R145T 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 250R180T 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 170% 150% 250R 100000 130% 110% 10000 90% 70% 1000 50% 30% 100 10% -40 -30 -20 -10 0 10 20 30 40 5060 70 80 Temperature (C) 10 1 0.1 0.01 0.1 1 10 100 Current in Amperes 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. 100 2010 Littelfuse, Inc. 250R Series Specications are subject to change without notice. Revised: July 12, 2010 Please refer to www.littelfuse.com/series/250R.html for current information. Time in Seconds 0.080A 0.120A 0.145A 0.180A Percentage of Rated Current