RKEF050-AP

Ptc Resettable Fuses Overview

The RKEF050-AP is a radial-leaded polymeric positive temperature coefficient (PPTC) resettable fuse from Littelfuse. It features a maximum voltage rating of 60V and a maximum current capacity of 40A. The device has a hold current (Ih) of 500 mA and a trip current (It) of 1 A. Construction includes tin-plated copper leads with 24AWG gauge and an insulation material composed of cured flame-retardant epoxy polymer.

Ptc Resettable Fuses Feature Summary

• Polymeric PPTC technology for overcurrent protection
• Radial leaded form factor for through-hole mounting
• Flame-retardant epoxy polymer insulation

Ptc Resettable Fuses Applications

• Consumer electronics circuit protection
• Portable device power lines
• Battery pack overcurrent safeguarding

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix AP indicates the Ammo Pack packaging configuration when sourcing components. Confirm that the part number matches the exact electrical ratings required for the target application, specifically the 500 mA hold current and 60V maximum voltage limits. Ensure compliance with RoHS standards as indicated in official documentation before finalizing procurement orders.

Ptc Resettable Fuses Selection Notes

Select this component for applications requiring a 60V maximum operating voltage and a 500 mA steady-state current. The radial lead design facilitates standard PCB assembly processes. Consider the 40A maximum fault current capability when evaluating short-circuit protection requirements. Ensure the thermal environment supports the self-heating mechanism essential for PPTC operation.

Ptc Resettable Fuses Part Context

This device belongs to the RKEF series of PolySwitch resettable fuses designed by Littelfuse. The series balances 60V rated voltages with hold currents up to 5A. These devices are engineered for high-volume electronics manufacturing and offer a comprehensive range of form factors and termination methods for diverse circuit protection needs.

Ptc Resettable Fuses Replacement Considerations

Cross-reference other RKEF series parts for similar electrical characteristics if availability is an issue. Verify that any substitute maintains the same radial lead configuration and 60V voltage rating. Ensure the replacement part meets the 500 mA hold current requirement without altering the physical footprint or mounting style.