MF-R500

Overview

The Bourns MF-R500 is a radial leaded PTC resettable fuse from the Multifuse MF-R series. It features a 5 A hold current and a 10 A trip current, designed for circuits with a maximum voltage of 30 VDC. The device has a low resistance of 30 mOhms and can withstand a maximum rated current of 40 A. It operates within a temperature range of -40°C to +85°C. The component measures 17.4 mm in length, 7.6 mm in width, and 24.9 mm in height, with a lead spacing of 10.2 mm.

Feature Summary

• Provides automatic circuit protection against overcurrent conditions through positive temperature coefficient polymer technology.
• Offers reliable thermal response with a low initial resistance to minimize power loss during normal operation.
• Features a self-resetting mechanism that restores conductivity after fault clearance without manual intervention.

Applications

• Overcurrent protection in consumer electronic devices
• Circuit safeguarding in portable computing equipment
• Protection for telecommunications network interfaces

Procurement Notes

Verify the specific suffix (e.g., AP) required for your packaging needs, as standard listings may indicate Ammo Pack quantities. Confirm RoHS compliance status directly with the manufacturer or authorized distributors before finalizing orders. Ensure the selected variant matches the required lead spacing and mounting style for your PCB layout.

Selection Notes

Select this component when designing low-voltage DC circuits requiring resettable protection up to 5 A. Consider the 30 VDC rating and 30 mOhm resistance for efficiency. Evaluate the -40°C to +85°C operating range against your environmental constraints. The radial package requires appropriate hole spacing on the PCB.

Part Context

This part belongs to the Bourns Multifuse MF-R series of PPTC resettable fuses. These components are widely used across various industries for protecting sensitive electronics. The series offers multiple current ratings and voltage options to suit diverse application requirements while maintaining consistent performance standards.

Replacement Considerations

Check for exact match variants like MF-R500-AP. Verify that any substitute maintains the same 5 A hold current, 30 VDC max voltage, and radial lead configuration to ensure compatibility with existing designs.