MF-USHT200KX/12-2

Overview

The Bourns MF-USHT200KX/12-2 is a high-temperature polymeric positive temperature coefficient (PPTC) resettable fuse from the MF-USHT series. Designed for demanding thermal environments, this component provides overcurrent protection in circuits where standard PPTCs may fail due to elevated ambient temperatures. It functions as a self-resetting device that trips on overcurrent conditions and returns to a low-resistance state once the fault is cleared and the unit cools down.

Feature Summary

• High-temperature capability suitable for harsh operating environments
• Self-resetting functionality eliminates the need for manual replacement after tripping
• Compact surface-mount design facilitates automated assembly and space-constrained layouts

Applications

• Automotive electronics requiring AEC-Q200 compliance
• Industrial equipment operating in high-thermal zones
• Consumer devices with strict space and reliability requirements

Procurement Notes

Verify the specific holding current and trip characteristics against your circuit's operational parameters before procurement. Ensure the mounting surface can withstand the thermal profile during soldering. Confirm that the application environment does not exceed the component's maximum rated temperature to maintain reliable performance.

Selection Notes

Select this component when standard PPTC fuses are insufficient due to high ambient heat. Evaluate the maximum operating voltage and the required hold current relative to your normal circuit load. Consider the physical footprint and termination type to ensure compatibility with your PCB layout and assembly processes.

Part Context

This part belongs to the MF-USHT series, an expansion of Bourns' PPTC lineup focused on high-temperature resilience. The series addresses gaps in traditional resettable fuses that degrade or fail prematurely in hot environments, offering a robust solution for automotive and industrial sectors where thermal stability is critical for long-term reliability.

Replacement Considerations

Direct substitutes must match the high-temperature rating and surface-mount form factor. Verify that any alternative maintains equivalent electrical characteristics, including hold current and trip time, to ensure circuit protection integrity without redesigning the PCB.