MF-RX075/72-0-17

Overview

The Bourns MF-RX075/72-0-17 is a polymeric PTC resettable fuse from the MF-RX/72 series, rated for a maximum voltage of 72 VDC. It features a hold current of 750 mA and a trip current of 1.5 A. The component has a maximum resistance of 800 mΩ and a maximum fault current rating of 40 A. It operates within a temperature range of -40°C to +85°C and utilizes a radial leaded through-hole package with a 10.2 mm lead spacing.

Feature Summary

• Provides automatic circuit protection by increasing resistance in response to overcurrent conditions
• Self-resetting functionality eliminates the need for manual replacement after fault clearance
• Compliant with UL and RoHS standards for safety and environmental requirements

Applications

• Overcurrent protection for portable electronic devices
• Protection circuits for battery-powered equipment
• Interface protection for communication ports

Procurement Notes

Verify the specific suffix -17 indicates the required packaging configuration against official datasheets. Confirm that the 72VDC rating aligns with the target circuit's maximum operating voltage. Ensure the hold current of 750 mA accommodates normal operational peaks without nuisance tripping. Validate compliance with project-specific regulatory standards such as UL or RoHS before finalizing procurement.

Selection Notes

Select this component when a 72VDC system requires a resettable fuse with a 750 mA hold current. The 1.5 A trip current provides a defined threshold for fault detection. Consider the radial leaded package for through-hole PCB mounting. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range during both normal and fault conditions.

Part Context

This part belongs to the Bourns Multifuse MF-RX/72 series, designed for high-reliability applications requiring compact overcurrent protection. The series offers various hold currents while maintaining a consistent 72VDC voltage rating. These components serve as alternatives to traditional fuses in space-constrained designs where serviceability is critical.

Replacement Considerations

Direct substitutes include other MF-RX/72 series variants with matching electrical ratings. Verify physical dimensions and lead spacing compatibility when replacing similar components from different manufacturers.