MF-R250-AP-10-99

Overview

The Bourns MF-R250-AP-10-99 is a radial leaded PPTC resettable fuse from the Multifuse MF-R series. It features a 2.5 A hold current and a 5 A trip current, rated for a maximum voltage of 30 V. The device exhibits a maximum resistance of 48 mOhms and supports a maximum fault current of 40 A. It operates within a temperature range of -40°C to +85°C and dissipates up to 1.2 W. Physical dimensions include a length of 12 mm, width of 3 mm, height of 18.3 mm, and a lead spacing of 5.1 mm.

Feature Summary

• Provides automatic circuit protection through positive temperature coefficient polymer technology that increases resistance upon overheating.
• Offers manual-free restoration of conductivity after the fault condition is removed and the device cools down.
• Designed for PCB mounting with radial leads to facilitate through-hole integration in electronic assemblies.

Applications

• Overcurrent protection in consumer electronics power supplies
• Circuit safeguarding in telecommunications equipment
• Protection for industrial control system interfaces

Procurement Notes

Verify the specific suffix AP-10-99 against the manufacturer's latest datasheet to confirm packaging configuration and compliance status. Ensure the selected variant matches the required lead spacing and thermal characteristics for the target PCB layout. Cross-reference the part number with official Bourns documentation to validate availability and manufacturing status before finalizing procurement plans.

Selection Notes

Select this component when a 2.5 A continuous current rating and 30 V maximum voltage are required for low-voltage circuit protection. Consider the 48 mOhms initial resistance and 1.2 W power dissipation capabilities for thermal management planning. Evaluate the radial lead configuration and 5.1 mm spacing against the available board space and assembly requirements.

Part Context

This part belongs to the Bourns Multifuse MF-R series of resettable fuses. These devices utilize polymeric positive temperature coefficient materials to provide overcurrent protection. The series is designed for applications requiring reliable, reusable circuit protection without the need for manual replacement associated with traditional fusible links.

Replacement Considerations

The MF-R250-99 is listed as an alternative part number with identical electrical specifications including 2.5 A hold current and 30 V rating. Verify package differences such as bulk versus ammo pack orientation if mechanical fitment is critical.