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250R Datasheet(PDF) 3 Page - Littelfuse

Part No. 250R
Description  POLYFUSE Resettable PTCs Radial Leaded
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Maker  LITTELFUSE [Littelfuse]
Homepage  http://www.littelfuse.com
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250R Datasheet(HTML) 3 Page - Littelfuse

   
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©2006 Littelfuse
250R Series
Specifications are subject to change without notice.

Electronics Designers Guide
POLYFUSE® Resettable PTCs
Radial Leaded
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 10/700μs
ITU K.20/21/45 – 4kV 10/700μs*
ITU K.20/21/45 – 230Vac, 10
Ω
ITU K.20/21/45 – 600Vac, 600
Ω
250R180
ITU K.20/21/45 – 1.5kV 10/700μs
ITU K.20/21/45 – 4kV 10/700μs*
Telcordia GR – 974 – 1.0kV 10/1000μs
ITU K.20/21/45 – 230Vac, 10
Ω
ITU K.20/21/45 – 600Vac, 600
Ω
Telcordia GR – 974- 283Vac, 10A
*Devices should be independently evaluated and tested for use in any specific application


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