Littelfuse 250R Series Manual do Utilizador descarregar pdf (Página 3)

Revised: August 31, 2011

POLY-FUSE

Resettable PTCs

250R Series

Radial Leaded > 250R Series

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com/series/250R.html for current information.

250R Series

Protection Application Guide

Region/Speciﬁcation Application Device Selection

South America/Asia/Europe

ITU K.45

"DDFTTOFUXPSLFRVJQNFOU

Remote terminal

Repeaters

8"/FRVJQNFOU

$SPTToDPOOFDU

250R180

250R180T

250R145

250R145T

250R120

250R120T

South America/Asia/Europe

ITU K.21

Customer and IT equipment

Analog modems

"%4-Y%4-

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

5&+MJOFDBSET

"%4-7%4-TQMJUUFST

CSU/DSU

250R180

250R180T

250R145

250R145T

250R120

250R120T

North America Telcordia

GR-974

1SJNBSZQSPUFDUJPONPEVMFT

MDF modules

Network interface

250R180

250R180T

250R145

250R145T

250R120

250R120T

South America/Asia/Europe

ITU K.20

North America Telcordia

GR-1089

*OUSBCVJMEJOHDPNNVOJDBUJPOTZTUFNT

-"/70*1DBSET

-PDBMMPPQIBOETFUT

250R180

250R180T

250R145

250R145T

250R120

250R120T

South America/Asia/Europe

ITU K.20 and K.21

-"/*OUSBCVJMEJOHQPXFSDSPTT

Protection

-"/FRVJQNFOU*1QIPOF

250R080

3FTJTUBODFCJOOFEQBSUTBSFSFDPNNFOEFE

Agency Speciﬁcation Selection Guide For Telecom and Networking Applications

Product Lightning Power Cross

250R120

250R145

*56,oL7çT

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*56,o7BDû

*56,o7BDû

250R180

*56,oL7çT

*56,oL7çT

5FMDPSEJB(3ooL7çT

*56,o7BDû

*56,o7BDû

5FMDPSEJB(3o7BD"

%FWJDFTTIPVMECFJOEFQFOEFOUMZFWBMVBUFEBOEUFTUFEGPSVTFJOBOZTQFDJmDBQQMJDBUJPO

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