RXEF110K-2

Ptc Resettable Fuses Overview

The Littelfuse RXEF110K-2 is a PolySwitch radial lead PPTC resettable fuse from the RXEF series. It features a hold current of 1.1 A and a trip current of 2.2 A, with a maximum voltage rating of 72 VDC. The device has a maximum interrupting current (Imax) of 40 A and an initial resistance of 380 mOhms. It operates within a temperature range of -40°C to +85°C and utilizes a 5.8 mm lead spacing for PCB mounting.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection by increasing resistance during overcurrent events
• Offers manual reset capability after fault conditions are cleared
• Designed for through-hole PCB mounting with radial leads

Ptc Resettable Fuses Applications

• Industrial control systems
• Computer motherboards
• Modems and communication ports
• USB hubs and peripherals

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix 'K' against official Littelfuse documentation to confirm if it denotes a specific tape-and-reel packaging variant or certification difference compared to standard versions. Ensure the component matches the required 72VDC rating and 1.1A hold current specifications for the target application design.

Ptc Resettable Fuses Selection Notes

Select this component when a radial lead form factor is required for high-voltage up to 72VDC applications. The 1.1A hold current suits moderate current protection needs. Verify that the 380 mOhms resistance does not cause excessive voltage drop in the circuit design. Confirm compatibility with assembly processes for radial through-hole components.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse RXEF series of PolySwitch resettable fuses. These devices utilize polymer technology to provide overcurrent protection. The series is characterized by its ability to handle high fault currents and its suitability for protecting sensitive electronics in various industrial and consumer applications.

Ptc Resettable Fuses Replacement Considerations

Direct substitute: RKEF110. Note that the RKEF110 has a lower maximum voltage rating of 60VDC compared to the 72VDC of the RXEF110K-2. Verify that the reduced voltage rating is acceptable for the specific circuit application before substitution.