MF-RX090/72-0-17

Overview

The Bourns MF-RX090/72-0-17 is a polymeric resettable fuse from the Multifuse MF-RX/72 series, rated for 72 VDC maximum voltage and 0.9 A hold current. It features a trip current of 1.8 A and a maximum trip time of 7.2 seconds at that threshold. The device supports a maximum fault current of 40 A and exhibits a typical resistance of 0.14 Ω with a maximum of 470 mΩ. Designed for PCB mounting via radial leads with a 5.1 mm spacing, it operates within a temperature range of -40°C to +85°C and dissipates up to 1 W of power.

Feature Summary

• Radial leaded construction with cured flame-retardant epoxy polymer insulation meeting UL 94V-0 requirements
• Polymeric PTC technology providing automatic reset functionality after fault clearance
• RoHS compliant design suitable for environmentally conscious manufacturing processes

Applications

• Overcurrent protection in consumer electronics circuits
• Protection for portable computing devices and peripherals
• Circuit safeguarding in automotive electronic modules

Procurement Notes

Verify the specific suffix designation against the manufacturer's latest documentation to confirm physical dimensions and packaging configuration. Ensure the selected variant matches the required lead spacing and thermal characteristics for the target PCB layout. Cross-reference the RoHS compliance status with current regulatory standards before finalizing procurement orders.

Selection Notes

Select this component when a 72 VDC rating and 0.9 A hold current are required for radial through-hole applications. Consider the 40 A maximum interrupting capacity for high-fault scenarios. Evaluate the 1 W power dissipation capability against ambient thermal conditions. Confirm that the 7.2-second trip time aligns with the circuit's tolerance for temporary overloads.

Part Context

This part belongs to the Bourns Multifuse MF-RX/72 series, which provides low-profile resettable protection solutions. The series utilizes polymeric positive temperature coefficient materials to deliver reliable overcurrent protection. These components are designed for surface or through-hole mounting, offering a compact alternative to traditional fuses in space-constrained electronic designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Verify compatibility with existing footprints and electrical ratings if considering alternative manufacturers. Consult official cross-reference guides for potential equivalents.