RXE005

Ptc Resettable Fuses Overview

The Littelfuse RXE005 is a resettable polymeric positive temperature coefficient (PPTC) device designed for overcurrent protection in electronic circuits. It functions as a self-resetting fuse, automatically increasing resistance when excessive current causes internal heating, thereby limiting current flow to safe levels. Once the fault condition is removed and the device cools down, it returns to its low-resistance state, restoring normal circuit operation without requiring manual replacement.

Ptc Resettable Fuses Feature Summary

• Self-resetting functionality eliminates the need for component replacement after fault clearance
• Automatic current limitation through thermal activation of polymer composite material
• Compact surface-mount or through-hole form factor suitable for dense PCB layouts
• High reliability with no moving parts or mechanical wear mechanisms

Ptc Resettable Fuses Applications

• Portable consumer electronics battery pack protection
• USB port overcurrent protection in computers and peripherals
• Automotive infotainment and sensor circuit safeguarding
• Industrial control board input/output line protection

Ptc Resettable Fuses Procurement Notes

Verify the specific package type and holding current rating against the target circuit design requirements. Confirm compliance with relevant safety standards such as UL or IEC if required for the end product. Ensure storage conditions adhere to manufacturer guidelines to maintain material integrity before soldering.

Ptc Resettable Fuses Selection Notes

Select based on the maximum operating voltage and trip current threshold required by the application. Consider the time-to-trip characteristics relative to the protected component's surge tolerance. Evaluate ambient temperature ranges to ensure reliable performance under expected operating conditions without nuisance tripping.

Ptc Resettable Fuses Part Context

This component belongs to Littelfuse’s lineup of thermally activated resettable fuses. These devices are engineered to provide robust overcurrent protection where frequent fault occurrences make traditional one-time fuses impractical. The technology leverages the positive temperature coefficient property of crystalline polymers to achieve rapid response to overload conditions.

Ptc Resettable Fuses Replacement Considerations

Direct replacements must match the original part’s voltage rating, hold current, and trip current specifications. Verify that the substitute device offers equivalent thermal recovery characteristics and physical dimensions to fit existing PCB footprints without modification.

Ptc Resettable Fuses FAQ

How does the RXE005 recover after tripping?

The device recovers automatically once the overcurrent condition is removed and the component cools down to its baseline temperature, returning to its low-resistance state.

Is the RXE005 a one-time use device?

No, it is a resettable PPTC device designed for multiple trip cycles, unlike traditional fusible links which require replacement after blowing.