AHEF050

Ptc Resettable Fuses Overview

The AHEF050 is a PolySwitch resettable PTC fuse from Littelfuse, designed for radial through-hole PCB mounting. It features a 32VDC maximum voltage rating and a 500mA hold current. The device trips at 1A and supports a maximum fault current of 100A. Initial resistance is 350mΩ minimum, with a maximum post-trip resistance of 1.1Ω. It operates within a temperature range of -40°C to 125°C and holds AEC-Q200 automotive qualification.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection via polymer positive temperature coefficient technology
• Ensures reliable performance in automotive environments through AEC-Q200 qualification
• Offers radial leaded construction for standard printed circuit board integration

Ptc Resettable Fuses Applications

• Automotive electronic circuit protection
• Overcurrent protection for low-voltage DC systems
• Protection of sensitive components in harsh thermal environments

Ptc Resettable Fuses Procurement Notes

Verify the specific datasheet version and RoHS compliance status directly with Littelfuse or authorized distributors before procurement. Confirm that the AEC-Q200 automotive grade certification aligns with your project's reliability requirements. Ensure the radial lead spacing matches your PCB footprint design constraints. Cross-reference part number aliases such as RF3055-000 if sourcing from alternative channels.

Ptc Resettable Fuses Selection Notes

Select the AHEF050 when a 500mA hold current and 32VDC rating are required for radial mounting applications. Consider its 125°C operating temperature limit for high-heat zones. Compare initial resistance values against other series variants to ensure compatibility with circuit sensitivity. Verify that the 100A maximum fault current capability meets the prospective short-circuit conditions of the target application.

Ptc Resettable Fuses Part Context

The AHEF050 belongs to the AHEF series of PolySwitch resettable fuses by Littelfuse. This series is engineered specifically for automotive-grade applications requiring robust overcurrent protection. It complements other radial PPTC devices like the RHEF series but offers higher voltage ratings and automotive certification standards suitable for modern vehicle electronics.

Ptc Resettable Fuses Replacement Considerations

RF3055-000 is listed as an alias for this component. Verify electrical parameters match exactly before substitution.