MF-RX030/72-0-17

Overview

The Bourns MF-RX030/72-0-17 is a polymeric self-resetting fuse (PPTC) from the Multifuse MF-RX/72 series, designed for PCB mount applications. It features a radial disc package with a 5.1 mm lead spacing and measures 13.4 mm in length, 7.4 mm in diameter, and 3.1 mm in height. The component has a maximum voltage rating of 72 VDC, a hold current of 300 mA, and a trip current of 600 mA. It supports a maximum fault current of 40 A and exhibits an initial resistance of 1.36 Ohms. Operating temperatures range from -40°C to +85°C, with a power dissipation of 500 mW.

Feature Summary

• Polymeric construction enables automatic reset after fault clearance without manual intervention
• Radial through-hole mounting facilitates standard PCB assembly processes
• High fault current capacity provides robust protection against power surges

Applications

• Overcurrent protection in portable electronic devices
• Circuit safeguarding in telecommunications equipment
• Power supply input protection in consumer electronics

Procurement Notes

Verify the specific ordering suffix '-17' against the manufacturer's official documentation to confirm packaging details and exact physical dimensions. Ensure the selected variant matches the required hold current and voltage ratings for the target application circuit design.

Selection Notes

Select this component when a 300 mA hold current and 72 VDC maximum voltage are required for overcurrent protection. Consider the radial disc form factor for through-hole PCB layouts where space constraints allow for a 13.4 mm length and 7.4 mm diameter footprint.

Part Context

This part belongs to the Bourns Multifuse MF-RX/72 series of PTC resettable fuses. These devices utilize polymer technology to provide reusable overcurrent protection. The series is characterized by low resistance and fast response times, suitable for protecting sensitive electronic circuits from damage due to excessive current flow.

Replacement Considerations

MF-RX030/72-0 is a related variant within the same series. Verify electrical parameters and physical dimensions before substitution. No other direct substitutes are confirmed in public documentation.