MF-R030

Ptc Resettable Fuses Overview

The Bourns MF-R030 is a radial leaded PPTC resettable fuse from the Multifuse MF-R series. It features a hold current of 300 mA and a trip current of 600 mA, rated for a maximum voltage of 60 VDC. The device 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 with a power dissipation of 500 mW. Physical dimensions include a diameter of 7.4 mm and a length of 13.4 mm.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection through positive temperature coefficient polymer technology that resets after fault clearance.
• Designed for PCB mounting with radial leads spaced at 5.1 mm for standard insertion applications.

Ptc Resettable Fuses Applications

• Overcurrent protection in consumer electronics circuits
• Surge protection for portable devices and accessories
• Battery pack protection in mobile equipment

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix (e.g., AP) required for packaging configuration, as the base model number may denote different reel or bulk options. Confirm RoHS compliance status and lead-free soldering compatibility during component qualification. Ensure the selected variant matches the required axial or radial lead spacing for the target PCB footprint design.

Ptc Resettable Fuses Selection Notes

Select this component when a 60 VDC rating and 300 mA hold current are sufficient for the application. Consider higher voltage ratings if the system exceeds 60 V. Evaluate thermal derating requirements based on ambient operating temperatures above 25°C. Compare physical size constraints against available board space for radial leaded components.

Ptc Resettable Fuses Part Context

This part belongs to the Bourns Multifuse MF-R series of resettable fuses. These devices utilize conductive polymer technology to provide overcurrent protection. The series offers various hold currents and voltage ratings to suit different electronic circuit protection needs across industrial and consumer markets.

Ptc Resettable Fuses Replacement Considerations

Public confirmed substitute part numbers: MF-R030/72-0, MF-RX030/72-0.

Ptc Resettable Fuses FAQ

What is the difference between hold current and trip current for this fuse?

Hold current is the maximum current the device will allow without tripping indefinitely (300 mA). Trip current is the minimum current that will cause the device to switch to a high-resistance state within a specified time (600 mA).

Does the MF-R030 require replacement after a fault event?

No, it is a resettable fuse. Once the fault condition is removed and the device cools down, it automatically returns to its low-resistance state.