RXEF020-2

Ptc Resettable Fuses Overview

The Littelfuse RXEF020-2 is a PolySwitch radial-leaded resettable PPTC fuse designed for circuit 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 device has a minimum resistance of 4.4 Ohms and a maximum power dissipation of 410 mW. It supports a maximum fault current of 40 A and operates within a temperature range of -40°C to +85°C. Physical dimensions include a diameter of 7.4 mm and a length of 3 mm, with a lead spacing of 5.8 mm.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection through automatic resistance increase during fault conditions
• Offers resettable functionality to restore circuit continuity after cooling
• Features radial leads for direct PCB mounting compatibility

Ptc Resettable Fuses Applications

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

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix designation against official Littelfuse documentation to confirm electrical characteristics and physical form factor. Ensure the selected variant matches the required hold current and voltage rating for the target application circuit. Confirm RoHS compliance status and agency approvals relevant to the end product's regulatory requirements before finalizing procurement specifications.

Ptc Resettable Fuses Selection Notes

Select this component based on the 200 mA hold current requirement and 72 VDC maximum voltage constraint. Evaluate the 4.4 Ohm initial resistance and 410 mW power dissipation limits against thermal management capabilities. Consider the radial lead configuration and 5.8 mm spacing for PCB layout constraints. Verify that the 40 A interrupting rating exceeds potential fault currents in the protected circuit branch.

Ptc Resettable Fuses Part Context

The RXEF series represents a comprehensive line of radial-leaded PolySwitch resettable fuses from Littelfuse. This series is engineered for low hold currents down to 50 mA and high voltage ratings up to 72 VDC. The devices are designed for high-volume electronics assembly and comply with RoHS, lead-free, and halogen-free standards. They are recognized by major safety agencies including UL, CSA, TUV, and CQC.

Ptc Resettable Fuses Replacement Considerations

RXEF020-AP

Ptc Resettable Fuses FAQ

What is the maximum interrupting rating for the RXEF020-2?

The maximum interrupting rating (Imax) for the RXEF020-2 is 40 A.

Does the RXEF020-2 require external isolation components?

No, the device provides integrated overcurrent protection without requiring external isolation components for standard circuit applications.