MF-RHT050-0-17

Overview

The Bourns MF-RHT050-0-17 is a resettable polymer positive temperature coefficient (PPTC) device from the Multifuse series, designed for overcurrent protection in electronic circuits. This specific model belongs to the high-temperature variant lineup, engineered to maintain stable performance under elevated thermal conditions where standard PTCs might trip prematurely. It functions as a self-resetting fuse that transitions to a high-resistance state during fault conditions, effectively limiting current flow to protect downstream components. Upon removal of the fault and subsequent cooling, the device automatically returns to its low-resistance conducting state, ensuring continuous circuit operation without manual replacement.

Feature Summary

• Self-resetting functionality eliminates the need for manual fuse replacement after fault clearance
• High-temperature stability ensures reliable operation in demanding thermal environments
• Compact surface-mount package design facilitates automated assembly and space-constrained layouts

Applications

• Automotive electronics circuit protection
• Industrial equipment overcurrent safeguarding
• Consumer electronics power line protection
• Telecommunications infrastructure surge defense

Procurement Notes

Verify the exact part number suffix against official Bourns documentation to confirm voltage and current ratings. Ensure compliance with RoHS directives if required by your manufacturing standards. Cross-reference the datasheet for specific hold and trip currents before finalizing procurement orders to match application requirements precisely.

Selection Notes

Select this component based on the required operating voltage and maximum continuous current for the target circuit. Consider the ambient temperature range and potential heat dissipation characteristics of the PCB layout. Evaluate the response time and maximum fault current capabilities to ensure adequate protection levels for sensitive downstream components within the system architecture.

Part Context

This component is part of Bourns' extensive Multifuse PPTC family, which offers various packages and ratings for diverse protection needs. The RHT series specifically addresses applications requiring robust performance at higher temperatures compared to standard polymeric devices. It complements other Bourns circuit protection solutions like fuses and TVS diodes by providing reusable protection mechanisms.

Replacement Considerations

Consult official Bourns substitution guides for verified equivalent parts. Do not assume generic PTC replacements are compatible due to varying thermal and electrical characteristics. Verify pinout and mounting compatibility when considering alternative manufacturers or series.