MF-RX250/72-0-14

Overview

The Bourns MF-RX250/72-0-14 is a radial leaded Polymeric Positive Temperature Coefficient (PPTC) resettable fuse from the Multifuse MF-RX/72 series. It provides overcurrent protection with a hold current of 2.50 A and a trip current of 5.00 A at maximum voltage of 72 VDC. The device exhibits a maximum resistance of 0.05 Ohms and supports a maximum fault current rating of 40 A. It operates within a temperature range of -40°C to +85°C, features a 5.1 mm lead spacing, and has physical dimensions of 7.4 mm diameter by 12.7 mm height.

Feature Summary

• Provides automatic circuit recovery after fault conditions without manual replacement
• Offers dual-mode protection against both overcurrent and excessive temperature events
• Features a compact radial leaded package suitable for through-hole PCB mounting

Applications

• Overcurrent protection in industrial control systems
• Surge protection for telecommunications equipment
• Circuit safeguarding in consumer electronics power supplies

Procurement Notes

Verify the specific suffix configuration when ordering, as variations such as -AP or -0-14 may indicate differences in packaging or material composition rather than electrical performance. Confirm RoHS compliance status directly with the manufacturer documentation prior to integration. Ensure the selected variant matches the required lead spacing and physical footprint for the target printed circuit board layout.

Selection Notes

Select this component based on the required 2.50 A hold current and 72 VDC maximum voltage rating. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range. Consider the 40 A maximum fault current capability to ensure adequate protection against short-circuit conditions. Verify that the radial lead configuration aligns with the assembly process and available PCB real estate.

Part Context

This part belongs to the Bourns Multifuse MF-RX/72 series, which specializes in high-current PPTC resettable fuses. The series is designed for applications requiring robust protection against transient and sustained overcurrent conditions. Components in this family share common interface characteristics but vary in current ratings and physical dimensions to suit different circuit requirements.

Replacement Considerations

Compatible substitutes include other MF-RX/72 series variants with matching electrical ratings. Cross-reference specific part numbers such as MF-RX250/72-AP for equivalent electrical performance with potential packaging differences. Verify dimensional compatibility before substitution.