FEMTOASMDC005F-2

Ptc Resettable Fuses Overview

The Littelfuse FEMTOASMDC005F-2 is a surface-mount polymer PTC resettable fuse from the femtoASMD series, designed for automotive applications. It features a hold current of 50 mA and a trip current of 150 mA at 25°C. The device supports a maximum voltage of 15 VDC and has a maximum fault current rating of 10 A. Initial resistance is typically 3.8 Ohms, with a maximum post-trip resistance of 30 Ohms. It operates within a temperature range of -40°C to +85°C and meets AEC-Q200 qualification standards.

Ptc Resettable Fuses Feature Summary

• Provides overcurrent protection in compact surface-mount form factor suitable for space-constrained designs
• Automatically resets upon removal of power or fault condition without requiring replacement
• Qualified for harsh automotive environments under AEC-Q200 standards

Ptc Resettable Fuses Applications

• Automotive electronic control units (ECUs)
• Infotainment system circuit protection
• Sensor module power lines

Ptc Resettable Fuses Procurement Notes

Verify component authenticity through authorized Littelfuse distributors or certified partners. Confirm that the received parts match the specified AEC-Q200 qualification and femtoASMD series designation. Check packaging integrity to ensure moisture sensitivity level requirements are met during storage and handling prior to soldering.

Ptc Resettable Fuses Selection Notes

Select this component when low holding current near 50 mA is required for sensitive automotive circuits. The 15 VDC rating limits suitability to low-voltage DC systems. Consider the 30 Ohms maximum post-trip resistance impact on downstream voltage drops compared to lower-resistance alternatives in the same family.

Ptc Resettable Fuses Part Context

This part belongs to the femtoASMD series, representing one of Littelfuse's smallest SMD PPTC devices. It complements larger series like nanoASMD and miniASMD by offering protection in the 0603 metric footprint. The series targets high-density automotive PCB layouts where traditional fuses are impractical.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include other femtoASMD variants with matching 50 mA hold current and 15 VDC voltage ratings, such as FEMTOASMDC010F-2 for higher current needs. Cross-series replacements require verifying package dimensions and thermal characteristics.