RXEF075S

Ptc Resettable Fuses Overview

The Littelfuse RXEF075S is a PolySwitch resettable PTC fuse designed for PCB mounting with radial leads. It features a hold current of 750 mA and a trip current of 1.5 A, operating at a maximum voltage of 72 V. The device has a maximum resistance of 600 mOhms and can withstand a maximum fault current of 40 A. It dissipates up to 920 mW of power and operates within a temperature range of -40°C to +85°C. Physical dimensions include a diameter of 10.2 mm and a length of 3 mm.

Ptc Resettable Fuses Feature Summary

• Provides automatic overcurrent protection through self-resetting polymer technology
• Offers high fault current capacity for robust circuit safeguarding
• Features radial leaded construction for standard printed circuit board integration

Ptc Resettable Fuses Applications

• Overcurrent protection in portable electronic devices
• Circuit safeguarding in telecommunications equipment
• Protection for automotive electronics systems

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix designation against official Littelfuse documentation to confirm lead configuration and packaging details. Ensure the selected component matches the required thermal derating curves for the intended operating environment. Cross-reference the datasheet specifications with system voltage and current requirements to validate performance margins before procurement.

Ptc Resettable Fuses Selection Notes

Select this component based on the 750 mA hold current requirement and 72 V maximum voltage rating. Consider the 40 A maximum fault current capability for short-circuit protection needs. Evaluate the thermal characteristics and physical size constraints to ensure compatibility with the target PCB layout and ambient operating temperatures.

Ptc Resettable Fuses Part Context

This part belongs to the RXEF series of PolySwitch resettable fuses from Littelfuse. These devices utilize polymeric positive temperature coefficient technology to provide reusable overcurrent protection. The series is widely used across industrial, consumer, and automotive applications where reliable circuit protection is essential.

Ptc Resettable Fuses Replacement Considerations

RXEF075S

Ptc Resettable Fuses FAQ

What is the typical time to trip for this device?

The typical time to trip is approximately 6.3 seconds when subjected to the specified trip current.

Does this component require manual replacement after tripping?

No, it is a resettable fuse that automatically returns to a low-resistance state once the fault condition is removed and the device cools down.