RHEF1000

Ptc Resettable Fuses Overview

The Littelfuse RHEF1000 is a PolySwitch resettable PTC device designed for overcurrent protection. It features a maximum holding current of 10 A and a trip current of 18.5 A. The component supports a maximum voltage of 16 VDC with a fault current rating of 100 A. Initial resistance is typically 6.2 mOhms, rising to a maximum of 15 mOhms after tripping. It operates within a temperature range of -40°C to +125°C. Physical dimensions include a diameter of 17.5 mm and a lead spacing of 10.9 mm.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by raising resistance as it heats to limit current flow during fault conditions.
• Offers automatic recovery functionality, eliminating the need for manual replacement after the circuit returns to normal operating conditions.
• Designed for radial through-hole mounting on printed circuit boards to protect components and wiring harnesses.

Ptc Resettable Fuses Applications

• Protection of automotive actuators, screens, and small motors in commercial and passenger vehicles.
• Safeguarding telephony and networking equipment from high-voltage fault currents and overcurrent events.
• Overcurrent protection for power supply circuits and PCB components.

Ptc Resettable Fuses Procurement Notes

Verify the specific package variant required, as the RHEF1000 designation may correspond to bulk packaging while suffixes like -2 indicate tape and reel options. Confirm that the 16V DC rating aligns with the target circuit's maximum operating voltage. Ensure the 10A holding current meets the continuous load requirements without nuisance tripping under normal thermal conditions.

Ptc Resettable Fuses Selection Notes

Select this component when a radial leaded form factor is preferred for through-hole assembly. The 10A rating suits high-current applications where standard polyfuses might be insufficient. Consider the 16V maximum voltage limit; higher voltage circuits require different series ratings. Verify that the 100A fault current capability matches the available short-circuit current in the protected circuit.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse RHEF series of PolySwitch resettable fuses. It serves as a solid-state alternative to traditional fusible links, offering reusable circuit protection. The RHEF series is engineered for robust performance in demanding environments, providing consistent electrical characteristics across the specified temperature range.

Ptc Resettable Fuses Replacement Considerations

RF3321-000 is a confirmed substitute part number with identical electrical specifications and physical dimensions.

Ptc Resettable Fuses FAQ

What is the maximum fault current rating for the RHEF1000?

The RHEF1000 has a maximum fault current rating of 100 A.

Does the RHEF1000 support surface mount installation?

No, the RHEF1000 is designed for radial through-hole (PCB mount) installation.