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

Littelfuse_250R
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Disclaimer Notice

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)
Temp
(deg C)
RTYP
(Ω)
Partner ECAD ModelsStockSamplesCompare
250R0800.080.162503114330.354-40¦C - + 85¦C22250R080CheckOrder
250R080T0.080.162503115330.354-40¦C - + 85¦C22250R080TCheckOrder
250R1200.120.242503141612.5-40¦C - + 85¦C8250R120CheckOrder
250R120-R10.120.242503161612.5-40¦C - + 85¦C9250R120_R1CheckOrder
250R120-R20.120.242503181612.5-40¦C - + 85¦C10.5250R120_R2CheckOrder
250R120-R30.120.242503181612.5-40¦C - + 85¦C10250R120_R3CheckOrder
250R120-RA0.120.242503171612.5-40¦C - + 85¦C9250R120_RACheckOrder
250R120-RC0.120.24250315.41413-40¦C - + 85¦C7.5250R120_RCCheckOrder
250R120-RF0.120.242503161612.5-40¦C - + 85¦C10.5250R120_RFCheckOrder
250R120T0.120.242503171612.5-40¦C - + 85¦C12250R120TCheckOrder
250R1450.1450.292503131412.5-40¦C - + 85¦C6250R145CheckOrder
250R145-RA0.1450.292503131212.5-40¦C - + 85¦C5.5250R145_RACheckOrder
250R145-RB0.1450.29250314.51412.5-40¦C - + 85¦C6250R145_RBCheckOrder
250R145T0.1450.29250315.41412.5-40¦C - + 85¦C7.5250R145TCheckOrder
250R1800.180.65250101.80.84120-40¦C - + 85¦C2.2250R180CheckOrder
250R180T0.180.65250101.81.44.5121-40¦C - + 85¦C3.9250R180TCheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
250R080U PTC 60V/250V POLYFUSE TELECOM .080A RoHS No 07/07/2006 PbFree No 07/07/2006 CoC_RoHS10_250R080U_05-31-2017 REACH209_Declaration_250R080U_10-20-2020 Yes
01/01/2010
Does not Contain
250R080DR 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
250R080ZR PTC 60V/250V POLYFUSE TELECOM .080A RoHS No 07/07/2006 PbFree No 07/07/2006 CoC_RoHS10_250R080ZR_10-01-2019 REACH209_Declaration_250R080ZR_12-23-2020 Yes
01/01/2010
Does not Contain
250R120U PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 CoC_RoHS10_250R120U_04-13-2019 REACH197_Declaration_250R120U_04-13-2019 Yes
01/01/2010
Does not Contain
250R120ZR 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 CoC_RoHS10_250R120-R2U_06-27-2019 REACH197_Declaration_250R120-R2U_06-27-2019 Yes
01/01/2010
Does not Contain
250R120-R2ZR 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-RCZR PTC 60V/250V POLYFUSE TELECOM .120A RoHS No 07/07/2006 PbFree No 07/07/2006 CoC_RoHS10_250R120-RCZR_07-26-2017 Yes
01/01/2010
250R145U PTC 60V/250V POLYFUSE TELECOM .145A RoHS No 07/07/2006 PbFree No 07/07/2006 CoC_RoHS10_250R145U_05-31-2017 REACH197_Declaration_250R145U_01-25-2019 Yes
01/01/2010
Does not Contain
250R145ZR PTC 60V/250V POLYFUSE TELECOM .145A RoHS No 07/07/2006 PbFree No 07/07/2006 CoC_RoHS10_250R145ZR_01-28-2019 REACH197_Declaration_250R145ZR_01-28-2019 Yes
01/01/2010
Does not Contain
250R180F PTC 60V/250V POLYFUSE TELECOM .180A 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 CoC_RoHS10_250R180MR_6-11-2020 Yes
01/01/2010
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pdf icon Resettable PTC 250R Datasheet

The 250R Series is designed to protect against short duration high voltage fault currents typically found in telecom applications...

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Electronics Circuit Protection Product Selection Guide - A guide to selecting Littelfuse circuit protection components for electronic applications...

pdf icon Circuit Protection Technology Application Matrix

Littelfuse is the world leader in the design and manufacturing of fuses for the automotive, industrial, handheld, computer and telecom markets...