MF-RX250/72-AP

Overview

The MF-RX250/72-AP is a radial leaded polymeric positive temperature coefficient (PPTC) resettable fuse from the Bourns Multifuse MF-RX/72 series. Designed for PCB mounting, this component provides overcurrent protection with a hold current of 2.5 A and a trip current of 5 A. It operates at a maximum voltage of 72 VDC and features a low resistance of 0.05 Ohms. The device supports a maximum fault current of 40 A and dissipates 1 W of power. It functions within a temperature range of -40°C to +85°C, utilizing a 5.1 mm lead spacing.

Feature Summary

• Provides automatic circuit protection by increasing resistance in response to overcurrent conditions
• Offers resettable functionality that restores normal operation after fault clearance
• Features radial leaded construction suitable for through-hole PCB integration

Applications

• Overcurrent protection for portable electronic devices
• Protection circuits in consumer electronics assemblies
• Battery pack safeguarding in mobile applications

Procurement Notes

Verify the specific suffix AP against the manufacturer's latest datasheet to confirm packaging configuration. Ensure the hold current rating aligns with the operational load requirements of the target circuit. Confirm compliance with RoHS directives if required for the final assembly. Cross-reference the maximum working voltage with the system's peak operating levels to ensure adequate safety margins during procurement validation.

Selection Notes

Select this component when a 2.5 A hold current and 72 VDC rating are required for compact circuit protection. Consider the 0.05 Ohm resistance for minimal voltage drop impact. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range. Compare physical dimensions against available PCB space constraints before finalizing the design choice.

Part Context

This part belongs to the Bourns Multifuse MF-RX/72 series of PTC resettable fuses. The series offers various current ratings while maintaining a consistent 72 VDC maximum voltage capability. These components serve as reusable alternatives to traditional fusible links, providing reliable protection across multiple fault events without requiring manual replacement.

Replacement Considerations

The alias MF-RX250-72-AP may refer to an RF receiver module rather than this fuse; verify the component type carefully. Direct substitutes within the same series include MF-RX250/72-0, which shares identical electrical specifications but differs in packaging format.