MF-RX065/72-2

Overview

The Bourns MF-RX065/72-2 is a radial leaded Polymeric Positive Temperature Coefficient (PPTC) resettable fuse from the Multifuse MF-RX/72 series. Designed for PCB mounting, this component provides overcurrent protection with a maximum voltage rating of 72 VDC. It features a hold current of 650 mA and a trip current of 1.3 A. The device exhibits a maximum resistance of 0.45 Ohms and operates within a temperature range of -40°C to +85°C. Physical dimensions include a diameter of 7.4 mm and a height of 13.4 mm, with a lead spacing of 5.1 mm.

Feature Summary

• Provides automatic circuit recovery after fault conditions without manual replacement
• Offers robust protection against overcurrent and excessive heat in electronic circuits
• Features a compact radial leaded form factor suitable for printed circuit board integration

Applications

• Consumer electronics power supply protection
• Automotive electronic circuit safeguarding
• Industrial instrumentation overcurrent defense

Procurement Notes

Verify the specific suffix designation to ensure correct packaging configuration, as variants exist for different handling requirements. Confirm that the 72 VDC maximum voltage rating aligns with the target circuit's operational limits. Ensure the 650 mA hold current meets the application's continuous load demands while providing adequate margin for transient spikes. Cross-reference the physical footprint dimensions against the PCB layout to guarantee proper mechanical fit and lead spacing compatibility.

Selection Notes

Select this component when a radial PTC fuse is required for low-voltage DC applications up to 72 V. The 650 mA hold current makes it suitable for moderate load protection scenarios. Consider the 0.45 Ohm maximum resistance for voltage drop calculations in sensitive circuits. The wide operating temperature range supports deployment in environments subject to thermal variation. Verify compliance with relevant safety standards such as UL certification for the intended market.

Part Context

This part belongs to the Bourns Multifuse MF-RX/72 series, which specializes in radial leaded PPTC resettable fuses. The series is designed for general-purpose circuit protection in consumer and industrial electronics. These devices utilize polymeric technology to provide reliable, reusable overcurrent protection. The MF-RX/72 line is recognized for its compact size and consistent performance characteristics across various current ratings.

Replacement Considerations

Direct substitutes within the same series include MF-RX050/72-2 for lower current needs or MF-RX075/72-2 for higher capacity. Ensure any replacement maintains the 72 VDC rating and radial leaded configuration. Verify that the new part's hold and trip currents match the original design specifications to preserve circuit protection integrity.