250R Series - 250V PolySwitch® Lead-Free Radial Leaded Resettable PPTC for Telecom Protection

Series: 250R
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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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 specified in ITU K.20 and K.21.

Features:
  • RoHS compliant and lead-free
  • Fast time-to-trip
  • Binned and sorted narrow resistance ranges available
  • 0.08 — 0.18 Hold current range, 60VDC operating voltage
  • 250VAC interrupt rating

Access specifications, certifications, check availability and order parts below

Catalog #IHold (A)ITRIP
(A)		Max Volts
(V)		IMAX
(A)		PDMAX
(W)		RMIN
(Ω)		R1max
(Ω)		Max
Time
To
Trip
(A)		Max
Time
to
Trip Time
(Sec)		RTYP
(Ω)		Operating TemperaturePartner ECAD ModelsStockSamplesCompare
250R0800.080.162503114330.35422-40° to 85°C250R080CheckOrder
250R080T0.080.162503115330.35422-40° to 85°C250R080T
250R1200.120.242503141612.58-40° to 85°C250R120CheckOrder
250R120-R20.120.242503181612.510.5-40° to 85°C250R120-R2CheckOrder
250R120-RA0.120.242503171612.59-40° to 85°C250R120-RACheckOrder
250R120-RC0.120.24250315.414137.5-40° to 85°C250R120-RCCheckOrder
250R1450.1450.292503131412.56-40° to 85°C250R145CheckOrder
250R1800.180.65250101.80.841202.2-40° to 85°C250R180CheckOrder
250R120-R1
Obsolete: 2022 -11-03		0.120.242503161612.59-40° to 85°C250R120-R1
250R120-R3
Obsolete: 2022 -11-03		0.120.242503181612.510-40° to 85°C250R120-R3
250R120-RF
Obsolete: 2024 -01-07		0.120.242503161612.510.5-40° to 85°C250R120-RF
250R120T
Obsolete: 2022 -11-03		0.120.242503171612.512-40° to 85°C250R120T
250R145-RA
Obsolete: 2024 -01-07		0.1450.292503131212.55.5-40° to 85°C250R145-RA
250R145-RB
Obsolete: 2017 -08-15		0.1450.29250314.51412.56-40° to 85°C250R145-RB
250R145T
Obsolete: 2022 -11-03		0.1450.29250315.41412.57.5-40° to 85°C250R145T
250R180T
Obsolete: 2024 -01-07		0.180.65250101.81.44.51213.9-40° to 85°C250R180T
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
250R080DR PTC 60V/250V POLYFUSE TELECOM .080A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R080ZR PTC 60V/250V POLYFUSE TELECOM .080A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R080TZR PTC 60V/250V POLYFUSE TELECOM .080A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R080U PTC 60V/250V POLYFUSE TELECOM .080A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R080TDR PTC 60V/250V POLYFUSE TELECOM .080A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R080TU PTC 60V/250V POLYFUSE TELECOM .080A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120U PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120ZR PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-R1U PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-R1ZR PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-R2U PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-R2ZR PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-R3ZR PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-R3U PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-RAZR PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-RAU PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-RCZR PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-RCU PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-RFZR PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120-RFU PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120TU PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R120TZR PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R145U PTC 60V/250V POLYFUSE TELECOM .145A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R145ZR PTC 60V/250V POLYFUSE TELECOM .145A RoHS No 07/07/2006 PbFree No 07/07/2006
250R145-RAU PTC 60V/250V POLYFUSE TELECOM .145A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R145-RAZR PTC 60V/250V POLYFUSE TELECOM .145A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R145-RBU PTC 60V/250V POLYFUSE TELECOM .145A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R145-RBZR PTC 60V/250V POLYFUSE TELECOM .145A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R145TU PTC 60V/250V POLYFUSE TELECOM .145A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R145TZR PTC 60V/250V POLYFUSE TELECOM .145A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R180MR PTC 60V/250V POLYFUSE TELECOM .180A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R180F PTC 60V/250V POLYFUSE TELECOM .180A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R180TMR PTC 60V/250V POLYFUSE TELECOM .180A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
250R180TF PTC 60V/250V POLYFUSE TELECOM .180A RoHS No 07/07/2006 PbFree No 07/07/2006 Yes
01/01/2010
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