SRP Series - 15/30 V PolySwitch Lead Free Battery Strap PPTC - 125C Activation Temperature

Series: SRP
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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.

As a pioneer of polymeric positive temperature coefficient resettable devices, Littelfuse has developed several material platforms to serve the changing battery technology and to help protect battery applications. Each of these material platforms offers different performance characteristics, allowing engineers greater design flexibility. PolySwitch devices for battery protection include SRP, LR4, VTP, VLP, VLR, MXP and RSD series, and special application strap devices.


  • RoHS compliant
  • Lead-free versions of all devices are available.
  • Current ratings from 1.1A to 13A
  • Fast time-to-trip


  • Many material platforms and device form factors give engineers more design flexibility
  • Compatible with high-volume electronics assembly
  • Assists in meeting regulatory requirements
  • Low resistance devices increase battery operating time


  • Mobile phones and smart phones
  • Tablet PCs
  • Ultra-thin notebooks
  • Mobile radios
  • Digital cameras
  • Portable media players
  • Power tools (charge lines)

Access specifications, certifications, check availability and order parts below

Catalog #IHold (A)ITRIP
Max Volts
Trip Time
Activation Temp (Deg C)Interrupt Current (A)Max Operating Temp (°C)Pd Typical (watts)Product
SRP120F1.22.7151001.20.0850.160.2250.123125100Not AvailableProduct SpecificationCheckOrder
SRP175F1.753.8151001. AvailableProduct SpecificationCheckOrder
SRP200F24.4301001. AvailableProduct SpecificationCheckOrder
SRP350F3.56.3301002.50.0170.0310.0530.024125100Not Available1.9Product SpecificationCheckOrder
SRP420F4.27.6301002.90.0120.0240.0460.018125100Not AvailableProduct SpecificationCheckOrder
Catalog # Certificates
Sorting icon
SRP120F curiconuriconCSAicon
SRP175F curiconuriconCSAicon
SRP200F curiconuriconCSAicon
SRP350F curiconuriconCSAicon
SRP420F curiconuriconCSAicon
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
RF1669-000 SRP120F RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF1669-000_-SRP120F-_03-06-2019 REACH219_Declaration_RF1669-000_(SRP120F)_11-18-2021 No
Does not Contain
RF1670-000 SRP175F RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF1670-000_-SRP175F-_08-29-2017 REACH205_Declaration_RF1670-000_-SRP175F-_02-04-2020 No
Does not Contain
RF1675-000 SRP200F RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF1675-000_-SRP200F-_12-11-2020 REACH211_Declaration_RF1675-000_-SRP200F-_02-11-2021 No
Does not Contain
RF1673-000 SRP350F RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF1673-000_-SRP350F-_07-17-2019 REACH219_Declaration_RF1673-000_(SRP350F)_09-07-2021 No
Does not Contain
RF1672-000 SRP420F RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF1672-000_-SRP420F-_4-8-2020 REACH211_Declaration_RF1672-000_(SRP420F)_05-13-2021 No
Does not Contain
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pdf icon ESD Protection Solutions

Littelfuse_KunShan_ISO9001_2008 LF_Kunshan_ISO9001 2015_11-08-2020

Littelfuse_KunShan_TS16949_2009 LF_Kunshan_IATF16949 2016_11-08-2020

pdf icon Automotive Electronics Applications Guide

This guide provides a summary of key circuit protection consideration factors, descriptions of the technologies Littelfuse offers, and product selection tables. It is designed to help you quickly find a protection solution appropriate to your application.

pdficon Littelfuse Resettable PPTC SRP Series Datasheet

pdficon Resettable PTC StrapBattery Catalog Datasheet