RXEF375-0.476

Ptc Resettable Fuses Overview

The Littelfuse RXEF375-0.476 is a PolySwitch PTC resettable fuse with a hold current of 3.75A and a maximum voltage of 72V. It features a radial lead package for through-hole mounting. The device has a maximum trip current (Imax) of 40A, an initial resistance minimum of 30 mOhms, and a post-trip resistance maximum of 80 mOhms. The time to trip is specified at 24 seconds. This component belongs to the RXEF series and is designed for overcurrent protection in electronic circuits.

Ptc Resettable Fuses Feature Summary

• Polymeric PTC technology provides automatic reset functionality after fault clearance
• Radial leaded construction supports through-hole board assembly processes
• Complies with UL 1434 and CSA safety standards for regulatory approval

Ptc Resettable Fuses Applications

• Overcurrent protection for portable electronics
• Circuit protection in consumer appliances
• Industrial control system safeguarding

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix -0.476 against official Littelfuse documentation to confirm availability status. Note that some sources indicate this variant may be obsolete; ensure compatibility with current production requirements before procurement.

Ptc Resettable Fuses Selection Notes

Select this component when a 3.75A hold current and 72V rating are required for radial through-hole applications. Ensure the 40A Imax capability meets the circuit's fault current expectations and that the 30 mOhms initial resistance aligns with power loss constraints.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse RXEF series of PolySwitch resettable fuses. The series offers various current ratings from 50mA to 15A and voltage ratings up to 72V. These devices are characterized by low resistance and fast trip times, suitable for diverse electronic protection needs.

Ptc Resettable Fuses Replacement Considerations

Consult Littelfuse official substitution guides for direct replacements. Generic PTC fuses with identical 3.75A/72V/radial specifications may serve as functional alternatives if electrical parameters match exactly.