MF-RX375-2

Overview

The Bourns MF-RX375-2 is a polymeric PTC resettable fuse designed for through-hole radial mounting. It features a hold current of 3.75 A and a trip current of 6 A, with a maximum working voltage of 60 V DC. The device offers a high fault current rating of 40 A and an initial resistance minimum of 30 mOhms. Power dissipation is rated at 2.8 W, with a typical time to trip of 19.8 seconds under specified conditions. Operating temperature range spans from -40°C to +85°C.

Feature Summary

• Polymeric positive temperature coefficient technology for automatic circuit protection
• Radial leaded construction suitable for through-hole PCB assembly
• Flame retardant cured housing for enhanced safety compliance

Applications

• Overcurrent protection in automotive electronic circuits
• Protection of portable consumer electronics power lines
• Circuit safeguarding in industrial control systems

Procurement Notes

Verify the specific suffix designation against official Bourns documentation to confirm exact electrical tolerances and packaging configurations. Ensure the selected variant matches the required voltage and current ratings for the target application circuit. Cross-reference approval certifications such as UL or CSA if regulatory compliance is mandatory for the end product deployment.

Selection Notes

Select this component based on the 3.75 A hold current requirement and 60 V maximum working voltage constraints. Consider the 40 A interrupt rating for potential fault scenarios within the system design. Evaluate the thermal environment to ensure operation remains within the -40°C to +85°C range without derating issues affecting performance reliability.

Part Context

This part belongs to the MF-RX series of polymeric resettable fuses manufactured by Bourns Inc. The series provides reliable overcurrent protection solutions for various electronic applications. The MF-RX375-2 specifically addresses mid-range current requirements with a compact radial footprint, fitting into standard through-hole manufacturing processes for robust circuit defense.

Replacement Considerations

Direct substitutes include variants within the same MF-RX family such as MF-RX375/72-2 for higher voltage applications. Verify dimensional compatibility and lead spacing when considering alternative manufacturers' equivalent components to ensure proper PCB integration.