femtoASMD Series - PolySwitch Automotive 0603 Size Lead-Free Surface Mount Resettable PPTC

Roll Over to Zoom

The femtoASMD is the first small-sized 0603 PPTC series from Littelfuse with AEC-Q200 qualification for Automotive Applications and it provides surface mount overcurrent protection for applications where space is a prime concern and resettable protection is desired.


  • Products meet applicable automotive industry standards
  • Compatible with high-volume electronics assembly
  • Smaller footprint ˗ 0603 Size
  • Resettable solution against overcurrent and short-circuit
  • AEC-Q200 qualified, RoHS compliant, and ISO/TS16949 certified
  • Surface-mount Form Factor


  • Expertise from the world’s leading resettable overcurrent protection manufacturer
  • Provides wider range of form factors to enhance design flexibility
  • Meets ever-increasing demand for compact and space-saving designs due to more electronics content in vehicle
  • Restores system operation after reset when fault condition is removed, thus provides safety and protection
  • Able to meet most stringent requirements for the extreme harsh automotive environment
  • Suitable for standard PCB assembly to enable automated mass production


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

Product Video:

Access specifications, certifications, check availability and order parts below

Catalog #IHold (A)ITRIP
Max Volts
RaMAX (Ω)Max
Trip Time
Pd Typical (watts)Max Operating Temp (°C)Product
Partner ECAD ModelsStockSamplesCompare
FEMTOASMDC005F-20.050.1515100.53.830300.1N/A85Product SpecificationFEMTOASMDC005F-2CheckOrder
FEMTOASMDC008F-20.080.212100.52.814140.1N/A85Product SpecificationFEMTOASMDC008F-2CheckOrder
FEMTOASMDC010F/15-20.10.315100.5214140.1N/A85Product SpecificationFEMTOASMDC010F/15-2CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
RF4558-000 FEMTOASMDC005F-2 RoHS No 08/28/2018 PbFree No 08/28/2018 CoC_RoHS10_RF4558-000_-FEMTOASMDC005F-2-_10-24-2018 REACH201_Declaration_RF4558-000_-FEMTOASMDC005F-2-_12-10-2019 Yes
Does not Contain
RF4559-000 FEMTOASMDC008F-2 RoHS No 07/26/2017 PbFree No 07/26/2017 CoC_RoHS10_RF4559-000_-FEMTOASMDC008F-2-_11-11-2019 REACH201_Declaration_RF4559-000_-FEMTOASMDC008F-2-_11-11-2019 Yes
Does not Contain
RF4560-000 FEMTOASMDC010F/15-2 RoHS No 04/26/2016 PbFree No 04/26/2016 REACH219_Declaration_RF4560-000_(FEMTOASMDC010F-15-2)_08-02-2021 Yes
Does not Contain
If the product environmental information that you are looking for does not appear in this tab,
please complete the Product Environmental Information Request Form.