MF-RHT500-AP

Overview

The Bourns MF-RHT500-AP is a radial leaded Polymeric Positive Temperature Coefficient (PPTC) resettable fuse from the Multifuse MF-RHT series, designed for high-temperature applications. It features a hold current of 5.0 A and a trip current of 9.5 A at maximum operating voltage of 16 VDC. The device has a maximum resistance of 37 mOhms and can withstand a maximum fault current of 100 A. It operates within a temperature range of -40°C to +125°C and utilizes a 5.1 mm lead spacing for PCB mounting.

Feature Summary

• Provides automatic circuit protection by increasing resistance in response to overcurrent or overheating conditions
• Capable of resetting automatically after the fault condition is removed and the device cools down
• Engineered with high-temperature polymer materials to maintain stability in demanding thermal environments

Applications

• Automotive electronics circuits requiring AEC-Q200 compliance
• Industrial control systems operating in high-temperature zones
• Consumer appliance power input protection
• Battery pack overcurrent protection modules

Procurement Notes

Verify that the specific order suffix matches the required packaging configuration, as standard variants may differ in reel or tape specifications. Confirm RoHS compliance status through the official datasheet for environmental regulations. Ensure the procurement channel provides valid traceability documentation for automotive-grade components. Cross-reference the lead spacing and body dimensions against the target PCB footprint to prevent mechanical assembly errors during installation.

Selection Notes

Select this component when the circuit requires a hold current near 5.0 A and operates at voltages up to 16 VDC. The high-temperature rating makes it suitable for environments exceeding standard commercial limits. Consider the higher initial resistance compared to lower-current variants when calculating power loss. Verify that the expected fault currents do not exceed the 100 A maximum rating to ensure device integrity during transient events.

Part Context

This part belongs to the Bourns Multifuse MF-RHT series, which specializes in high-temperature PPTC resettable fuses. Unlike the standard MF-R series, the RHT variant is optimized for extended thermal performance, often meeting automotive qualification standards. It serves as a reusable alternative to traditional one-time fuses in space-constrained designs where manual replacement is impractical or hazardous.

Replacement Considerations

Direct substitutes include other MF-RHT series parts with matching electrical ratings, such as MF-RHT400-AP or MF-RHT650-AP, provided the hold and trip currents align with the circuit design requirements. Ensure any replacement maintains the same radial lead configuration and 5.1 mm spacing to fit existing board layouts without modification.