RXEF300-AP

Ptc Resettable Fuses Overview

The Littelfuse RXEF300-AP is a radial leaded PolySwitch resettable fuse from the RXEF series, designed for overcurrent protection in electronic circuits. It features a hold current of 3 A and a trip current of 6 A, with a maximum voltage rating of 72 VDC. The device has a maximum interrupting current (Imax) of 40 A and a typical resistance of 100 mOhms. It operates within a temperature range of -40°C to +85°C and is housed in a bulk package.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit recovery after fault conditions without manual replacement
• Offers high voltage capability up to 72 VDC for diverse system integration
• Features low resistance construction to minimize power loss during normal operation

Ptc Resettable Fuses Applications

• Satellite video receivers
• Industrial controls
• Computer motherboards
• Modems
• USB hubs, ports and peripherals

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm packaging type and exact electrical tolerances. Ensure the procurement order matches the required hold current and voltage ratings for the target application. Cross-reference the manufacturer part number with authorized distributor catalogs to avoid counterfeit components. Confirm RoHS compliance status if required by project specifications.

Ptc Resettable Fuses Selection Notes

Select this component when a radial leaded form factor is required for through-hole PCB mounting. Choose based on the 3 A hold current and 72 VDC maximum voltage requirements. Consider the 100 mOhms typical resistance for thermal management calculations. Evaluate the 40 A Imax rating against potential short-circuit currents in the protected circuit.

Ptc Resettable Fuses Part Context

The RXEF series represents a comprehensive line of radial leaded PPTC devices from Littelfuse. These components are designed for high-volume electronics assembly and offer a wide range of form factors. The series is recognized by major safety agencies including UL, CSA, TUV, and CQC, ensuring global compliance for various electronic equipment standards.

Ptc Resettable Fuses Replacement Considerations

RUEF300-AP: Similar 3 A hold current but limited to 30 VDC maximum voltage. RGEF300: Similar 3 A hold current but limited to 16 VDC maximum voltage. Verify voltage derating and physical footprint compatibility before substitution.