RHEF100-2

Ptc Resettable Fuses Overview

The Littelfuse RHEF100-2 is a PolySwitch resettable PPTC device designed for overcurrent protection in electronic circuits. It features radial leads for PCB mounting and operates within a voltage range up to 30 VDC. The component maintains a holding current of 1 A and trips at 1.8 A, with a maximum fault current rating of 40 A. Its initial resistance is 430 mΩ, and it functions reliably across an operating temperature range from -40°C to +125°C. The lead spacing is 5.8 mm.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by increasing resistance as heat limits current flow
• Radial lead configuration allows direct mounting onto printed circuit boards
• Resettable design enables automatic restoration of circuit continuity after fault conditions clear

Ptc Resettable Fuses Applications

• Protection of circuits, wiring harnesses, and PCB components
• Overcurrent safeguarding in automotive applications
• Telecom and power supply circuit protection

Ptc Resettable Fuses Procurement Notes

Verify the specific package option required for your assembly process, as the component is available in both cut tape and reel formats. Confirm that the 30 VDC maximum voltage rating aligns with your system's operational requirements. Ensure the 1 A holding current meets the continuous load demands of the protected circuit without nuisance tripping during normal operation.

Ptc Resettable Fuses Selection Notes

Select this component when a resettable solution is preferred over traditional fuses to reduce maintenance costs. The 1 A holding current makes it suitable for low-power signal lines or control circuits. Consider the 430 mΩ resistance impact on voltage drop if the application requires high efficiency. Verify that the 40 A maximum fault current capability exceeds potential short-circuit levels in the target system.

Ptc Resettable Fuses Part Context

This part belongs to the PolySwitch family of resettable fuses manufactured by Littelfuse. These devices utilize polymer technology to provide solid-state protection against overcurrent events. The radial lead form factor distinguishes it from surface-mount variants, offering flexibility for through-hole PCB designs where manual insertion or wave soldering is utilized.

Ptc Resettable Fuses Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.