ASMD Series - PolySwitch Automotive 2920 & 3425 Size Lead-Free Surface Mount Resettable PPTC

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Disclaimer Notice

Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, 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.

Helping to reduce weight of wire harnesses. PPTC devices distributed in a circuit can allow the use of smaller wire sizes with the resulting harnesses. Forego looping back and forth around a fuse box and place your protection wherever you see fit. The solid state composition of PPTC devices helps provide reliability.


  • ROHS compliant
  • Products meet applicable automotive industry standards
  • Compatible with high-volume electronics assembly


  • Expertise from the world’s leading resettable overcurrent protection manufacturer
  • Wide range of dedicated automotive surface-mount and radial-leaded resettable overcurrent devices


  • Automotive and Industrial Transportation
  • Actuators and medium motors
  • Trace protection
  • Harness/junction box protection
  • Powered outputs
  • Electronic control modules
  • Telematics/Infotainment

Access specifications, certifications, check availability and order parts below

Catalog #IHold (A)ITRIP
Max Volts
RaMAX (Ω)Max
Trip Time
Max Operating Temp (°C)Pd Typical (watts)Product
Partner ECAD ModelsStockSamplesCompare
ASMD030F-20.230.5960100.984.84.812851.1Product SpecificationASMD030F-2CheckOrder
ASMD050F-20.370.9460100.291.41.420851.7Product SpecificationASMD050F-2CheckOrder
ASMD075F-20.61.4830400.291120851.1Product SpecificationASMD075F-2CheckOrder
ASMD100F-20.92.1630400.0980.480.4820851.1Product SpecificationASMD100F-2CheckOrder
ASMD125F-21.042.4616400.0570.250.2520851.1Product SpecificationASMD125F-2CheckOrder
ASMD150F-21.272.9516400.0490.250.2525851.2Product SpecificationASMD150F-2CheckOrder
ASMD150F/33-21.22.8833401.90.0680.230.231485Product SpecificationASMD150F/33-2CheckOrder
ASMD185F-21.853.716401.50.0320.1260.12611.385Product SpecificationASMD185F-2CheckOrder
ASMD200F-21.733.9316400.050.120.1230851.2Product SpecificationASMD200F-2CheckOrder
ASMD250F-21.97516400.0350.0850.08530851.2Product SpecificationASMD250F-2CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
RF1631-000 ASMD030F-2 RoHS No 07/10/2018 PbFree No 07/10/2018 CoC_RoHS10_RF1631-000_(ASMD030F-2) REACH219_Declaration_RF1631-000_(ASMD030F-2) Yes
Does not Contain
RF1632-000 ASMD050F-2 RoHS No 07/20/2017 PbFree No 07/20/2017 CoC_RoHS10_RF1632-000_ASMD050F-2 REACH_SVHC Declaration_RF1632-000 (ASMD050F-2) Yes
Does not Contain
RF1633-000 ASMD075F-2 RoHS No 10/28/2016 PbFree No 10/28/2016 REACH_SVHC Declaration_RF1633-000 (ASMD075F-2) Yes
Does not Contain
RF1634-000 ASMD100F-2 RoHS No 02/27/2018 PbFree No 02/27/2018 CoC_RoHS10_RF1634-000_ASMD100F-2 REACH_SVHC Declaration_RF1634-000 (ASMD100F-2) Yes
Does not Contain
RF1636-000 ASMD125F-2 RoHS No 11/18/2016 PbFree No 11/18/2016 CoC_RoHS10_RF1636-000 (ASMD125F-2) REACH_SVHC Declaration_RF1636-000 (ASMD125F-2) Yes
Does not Contain
RF1637-000 ASMD150F-2 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
RF4269-000 ASMD150F/33-2 RoHS No 11/21/2016 PbFree No 11/21/2016 Yes
RF1378-000 ASMD185F-2 RoHS No 10/12/2017 PbFree No 10/12/2017 CoC_RoHS10_RF1378-000_ASMD185F-2 Yes
RF1638-000 ASMD200F-2 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
RF1639-000 ASMD250F-2 RoHS No 03/02/2016 PbFree No 03/02/2016 REACH_SVHC Declaration_RF1639-000 (ASMD250F-2) Yes
Does not Contain
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