Resettable Ptc Products Page 106 Resettable PTC Products

POLY-FUSE Resettable PTCs 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-974 *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 Telecom and Networking Applications Product Lightning Power Cross 250R120 250R145 ITU K.20/21/45 - 1.5kV 10/700 s ITU K.20/21/45 - 4kV 10/700 s* ITU K.20/21/45 - 230Vac, 10 ITU K.20/21/45 - 600Vac, 600 250R180 ITU K.20/21/45 - 1.5kV 10/700 s ITU K.20/21/45 - 4kV 10/700 s* Telcordia GR - 974 - 1.0kV 10/1000 s ITU K.20/21/45 - 230Vac, 10 ITU K.20/21/45 - 600Vac, 600 Telcordia GR - 974- 283Vac, 10A *Devices should be independently evaluated and tested for use in any specific application

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