MF-RX185/72-2-14

Overview

The Bourns MF-RX185/72-2-14 is a polymeric PTC resettable fuse from the MF-RX/72 series, designed for radial leaded PCB mounting. It features a hold current of 1.85 A and a trip current of 3.7 A at 25°C. The device supports a maximum voltage of 72 VDC and offers a high fault current rating of 40 A. Initial resistance is typically 120 mΩ, with an operating temperature range of -40°C to +85°C. The component measures 15.18 mm in diameter and utilizes a 5.1 mm lead spacing.

Feature Summary

• Utilizes polymer positive temperature coefficient technology for automatic circuit protection
• Provides reliable overcurrent interruption without requiring manual replacement
• Features radial leaded construction suitable for through-hole PCB integration

Applications

• Consumer electronics power supply input protection
• Portable computing device battery circuits
• Telecommunications equipment line protection

Procurement Notes

Verify the specific suffix '-2-14' against official Bourns documentation to confirm exact packaging and tolerance specifications. Ensure the selected variant matches the required hold current and voltage ratings for the target application circuit. Cross-reference the datasheet for precise thermal derating curves and mechanical dimensions prior to final procurement.

Selection Notes

Select this component when a 1.85 A hold current and 72 VDC rating are required for radial mounting. Consider the 120 mΩ initial resistance for low-power loss applications. Verify that the 40 A maximum fault current capability exceeds the prospective short-circuit current of the protected circuit branch.

Part Context

This part belongs to the MF-RX/72 series of multifuse resettable fuses. The series is characterized by compact radial leaded packages and robust polymer construction. It serves as a reusable alternative to traditional one-time fusible links in electronic circuits requiring overcurrent protection.

Replacement Considerations

MF-RX185/72-0-14