RXEF020-AP

Ptc Resettable Fuses Overview

The Littelfuse RXEF020-AP is a PolySwitch resettable PPTC device designed for overcurrent protection. It features a hold current of 200 mA and a trip current of 400 mA, with a maximum voltage rating of 72 VDC. The component has a minimum resistance of 4.4 Ohms and an interrupting rating of 40 A. It operates within a temperature range of -40°C to +85°C and dissipates 410 mW. Physical dimensions include a 7.4 mm diameter and 3 mm length, with a radial lead spacing of 5.8 mm.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by raising internal resistance during fault conditions
• Supports high-volume electronics assembly through compatible form factors
• Complies with RoHS standards and is lead-free and halogen-free

Ptc Resettable Fuses Applications

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

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix AP against official Littelfuse documentation to confirm packaging configuration. Ensure the selected variant matches the required hold and trip currents for the target circuit design. Cross-reference agency approvals such as UL 1434 and CSA requirements with the final product datasheet before integration.

Ptc Resettable Fuses Selection Notes

Select this component when low hold currents near 200 mA are required alongside a 72 VDC maximum voltage rating. The radial leaded package facilitates PCB mounting where surface mount options are unsuitable. Consider the 4.4 Ohm initial resistance and 410 mW power dissipation limits for thermal management in dense assemblies.

Ptc Resettable Fuses Part Context

This part belongs to the RXEF series of radial-leaded PolySwitch devices from Littelfuse. The series offers a comprehensive range of PPTC products with low hold currents down to 50 mA and high voltage ratings up to 72 V. These devices are recognized by UL, approved by CSA, and meet TUV and CQC standards for various international markets.

Ptc Resettable Fuses Replacement Considerations

Consult the official Littelfuse RXEF series selection guide for direct substitutes with matching electrical parameters. Verify that alternative parts maintain the same 72 VDC rating and radial lead spacing for mechanical compatibility.