RXEF375-1

Ptc Resettable Fuses Overview

The Littelfuse RXEF375-1 is a radial-leaded PolySwitch resettable PPTC fuse designed for overcurrent protection in electronic circuits. It features a maximum operating voltage of 60 VDC and a hold current of 3.75 A, with a trip current of 7.5 A. The device has a maximum rated current of 40 A and an initial resistance of 40 mOhms. It dissipates 3.4 W of power and operates within a temperature range of -40°C to +85°C. The component measures 25.2 mm in length, 16.5 mm in width, and 3 mm in height, with a lead spacing of 10.9 mm.

Ptc Resettable Fuses Feature Summary

• Provides automatic resettable overcurrent protection without requiring manual replacement after fault clearance.
• Offers high reliability through UL, CSA, TUV, and CQC agency approvals for global compliance.
• Supports high-volume electronics assembly processes due to compatible form factors and termination methods.

Ptc Resettable Fuses Applications

• Industrial controls
• Computer motherboards
• Modems

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix '-1' against official Littelfuse documentation to confirm if it denotes a distinct variant or packaging specification compared to the standard RXEF375. Ensure the procurement source provides valid RoHS compliance certificates and agency approval files (UL E74889, CSA 78165) as required for industrial integration.

Ptc Resettable Fuses Selection Notes

Select this component when circuit protection requires a 3.75 A hold current and 60 VDC rating. Consider the 40 mOhms resistance for low-power loss applications. Verify that the radial lead spacing of 10.9 mm fits the PCB layout constraints. Confirm thermal management capabilities for the 3.4 W power dissipation rating under expected ambient conditions.

Ptc Resettable Fuses Part Context

The RXEF375-1 belongs to the RKEF/RXEF series of radial-leaded PPTC devices from Littelfuse. This series is recognized for offering a comprehensive range of hold currents and voltage ratings suitable for diverse electronic protection needs. The part utilizes PolySwitch technology, providing a robust solution for safeguarding sensitive components against overcurrent events in commercial and industrial equipment.

Ptc Resettable Fuses Replacement Considerations

The RXEF375-1 may be functionally replaced by the RXEF375 or RKEF375, which share identical electrical specifications including 3.75 A hold current and 60 VDC rating. Verify that any substitute maintains the same radial lead configuration and dimensional footprint to ensure compatibility with existing PCB designs.