MF-RHT300-0

Overview

The MF-RHT300-0 is a polymeric PTC resettable fuse from the Bourns MF-RHT series, designed for high-temperature automotive applications. It features a hold current of 3 A and a trip current of 6 A at a maximum voltage of 16 VDC. The device offers an initial resistance of 33 mOhms and a post-trip resistance up to 79 mOhms, with a maximum fault current rating of 100 A. It operates within a temperature range of -40°C to +125°C and has a radial lead spacing of 5.1 mm. The component is AEC-Q200 qualified.

Feature Summary

• Provides overcurrent protection through automatic thermal tripping and self-resetting functionality
• Engineered for high-temperature environments suitable for demanding automotive circuits
• Complies with AEC-Q200 qualification standards for automotive grade reliability

Applications

• Automotive electronic circuit protection
• High-temperature power supply input protection
• Battery management system components

Procurement Notes

Verify the specific suffix against official Bourns documentation to confirm exact electrical tolerances and packaging configuration. Ensure the selected variant meets the required AEC-Q200 certification for automotive deployment. Cross-reference datasheet parameters such as hold current and resistance values with design specifications before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring robust overcurrent protection in high-temperature automotive environments. Consider the 16VDC maximum voltage and 3A hold current limits relative to the application's normal operating conditions. Evaluate the 100A maximum fault current capability to ensure adequate safety margins during transient events.

Part Context

This part belongs to the MF-RHT series of high-temperature PPTC resettable fuses manufactured by Bourns Inc. The series is specifically engineered to meet the rigorous demands of automotive electronics, offering reliable circuit protection under extreme thermal conditions while maintaining compliance with industry quality standards.

Replacement Considerations

Consult official Bourns substitution guides for verified alternatives. Generic equivalents may not match the specific AEC-Q200 automotive qualification or high-temperature performance characteristics required for this application.