MF-RX185

Ptc Resettable Fuses Overview

The Bourns MF-RX185 is a radial leaded PTC resettable fuse from the MF-RX/72 series. It features a 1.85 A hold current and a 3.7 A trip current. The device supports a maximum voltage of 72 VDC with a maximum fault current rating of 40 A. Typical resistance ranges from 80 mΩ to 190 mΩ, with a power dissipation of 2.1 W. Operating temperature spans -40°C to +85°C. Dimensions include a diameter of 15.18 mm and a height of 21.18 mm.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection against overcurrent conditions through polymer positive temperature coefficient technology.
• Offers repeated tripping and resetting capabilities without requiring manual replacement or component disposal.
• Features a compact radial leaded package designed for efficient printed circuit board mounting.

Ptc Resettable Fuses Applications

• Overcurrent protection in consumer electronics circuits
• Protection for portable computing devices and peripherals
• Surge protection in telecommunications equipment

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix code on the component marking to confirm exact electrical ratings and certification status. Ensure the selected variant matches the required hold and trip currents for the target application. Confirm compliance with relevant regional safety standards before integration into final products.

Ptc Resettable Fuses Selection Notes

Select this component when a 72 VDC rated resettable fuse is required for moderate current applications. Compare the 1.85 A hold current against the circuit's normal operating load to ensure reliable performance. Evaluate the physical dimensions against available PCB space constraints during the design phase.

Ptc Resettable Fuses Part Context

This part belongs to the Bourns Multifuse MF-RX/72 series of polymer PTC devices. These components are engineered for general-purpose circuit protection across various electronic industries. The series provides a cost-effective alternative to traditional fusible links by allowing reusable protection mechanisms.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes within the same series include MF-RX160/72-0-14 for lower current requirements. Verify that any replacement maintains the 72 VDC voltage rating and compatible physical footprint for seamless integration.