MF-RX030/72-0

Overview

The Bourns MF-RX030/72-0 is a radial leaded polymeric positive temperature coefficient (PPTC) resettable fuse from the Multifuse MF-RX/72 series. It features a hold current of 300 mA and a trip current of 600 mA, with a maximum voltage rating of 72 VDC. The component has a maximum fault current rating of 40 A and an initial resistance of 1.36 Ohms. It operates within a temperature range of -40°C to +85°C, utilizes a 5.1 mm lead spacing, and dissipates 500 mW of power.

Feature Summary

• Provides automatic circuit protection by increasing resistance significantly upon overheating or overcurrent conditions
• Restores normal operation automatically after the fault condition is removed and the device cools down
• Designed for PCB mounting with radial leads for through-hole integration

Applications

• LED driver applications
• Current control circuits
• Protection against current surges and electrostatic discharge

Procurement Notes

Verify that the ordered part number matches MF-RX030/72-0 exactly, as suffixes indicate specific packaging or tape-and-reel configurations which may differ from bulk supply. Confirm RoHS compliance status and UL certification requirements for the target application before finalizing procurement orders.

Selection Notes

Select this component when a 300 mA hold current and 72 VDC maximum voltage are required for circuit protection. Ensure the available space accommodates the specified dimensions and that the 5.1 mm lead spacing aligns with the PCB footprint design constraints for proper installation.

Part Context

This device belongs to the Bourns Multifuse MF-RX/72 series of PTC resettable fuses. These components are designed to replace traditional fusible links in electronic circuits, offering reusable protection against overcurrent and thermal faults while maintaining low profile and high reliability standards.

Replacement Considerations

No public confirmed substitute part numbers are documented for this specific component.