MF-R250-AP

Overview

The Bourns MF-R250-AP is a radial leaded PTC resettable fuse from the Multifuse MF-R series. It features a 2.5 A hold current and a 30 V maximum voltage rating. The device trips at 5 A and withstands up to 40 A fault current. Initial resistance is 48 mΩ, with a power dissipation of 1.2 W. Operating temperature ranges from -40°C to +85°C. Dimensions are 12 mm length, 3 mm width, and 18.3 mm height, with a 5.1 mm lead spacing.

Feature Summary

• Provides automatic circuit protection by increasing resistance during overcurrent events
• Restores conductivity after cooling following fault clearance
• Designed for PCB mounting via radial leads

Applications

• Overcurrent protection in electronic circuits
• Power supply input protection
• Peripheral interface safeguarding

Procurement Notes

Verify the specific suffix against official documentation to confirm exact package or tape-and-reel specifications. Confirm RoHS compliance status through the manufacturer's current datasheet. Ensure the component matches the required hold and trip currents for the target application design.

Selection Notes

Select this component when a 2.5 A continuous current and 30 VDC limit are required. Verify that the 48 mΩ initial resistance fits the circuit's voltage drop constraints. Ensure the operating environment stays within the specified -40°C to +85°C range for reliable performance.

Part Context

This part belongs to the Bourns Multifuse MF-R series of polymer PTC resettable fuses. These devices offer reusable protection compared to one-time fuses. The MF-R series is widely used for general circuit protection in consumer electronics and industrial equipment requiring radial leaded components.

Replacement Considerations

Check for direct substitutes within the MF-R series with matching electrical ratings. Verify physical dimensions and lead spacing compatibility before substitution.