RHEF800

Ptc Resettable Fuses Overview

The Littelfuse RHEF800 is a PolySwitch polymer PTC resettable fuse designed for through-hole radial disc mounting. It features a maximum voltage rating of 16V and a hold current (Ih) of 8A. The device trips at 13.6A with a typical trip time of 5 seconds. Initial resistance is minimized at 5.6 mOhms, rising to a maximum of 17.5 mOhms after tripping. It supports a maximum fault current of 100A and operates within a temperature range of -40°C to +85°C.

Ptc Resettable Fuses Feature Summary

• Polymer PTC technology provides automatic circuit protection that resets upon cooling.
• Radial lead disc package facilitates easy through-hole PCB integration.
• Low initial resistance minimizes power loss during normal operation.

Ptc Resettable Fuses Applications

• Overcurrent protection in portable electronic devices
• Battery pack protection circuits
• Peripheral interface ports

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix (e.g., HF, -1) against the datasheet to ensure correct termination style and packaging. Confirm RoHS compliance status and agency approvals (UL, CSA, TUV) required for the target market. Cross-reference the 16V/8A ratings with system requirements to prevent nuisance tripping or insufficient fault handling.

Ptc Resettable Fuses Selection Notes

Select this component when low profile radial mounting is required for high-current applications up to 8A. Ensure the operating environment stays within the -40°C to +85°C range. Compare the 17.5 mOhms max resistance against voltage drop constraints. Verify that the 100A Imax rating exceeds potential surge currents in the application.

Ptc Resettable Fuses Part Context

Part of the RGEF/RHEF series of PolySwitch resettable fuses. This series offers various form factors and current ratings for general circuit protection. The RHEF800 specifically targets high-current radial applications requiring robust overcurrent defense in compact spaces.

Ptc Resettable Fuses Replacement Considerations

RGEF800 is a direct functional equivalent within the same series offering identical electrical characteristics and mounting style. Check datasheets for minor variations in packaging or suffix codes between these part numbers before substitution.