MF-RHT550-2-14

Overview

The Bourns MF-RHT550-2-14 is a radial leaded polymeric positive temperature coefficient (PPTC) resettable fuse from the MF-RHT series, designed for high-temperature circuit protection. It features a hold current of 5.5 A and a trip current of 10 A at rated voltages up to 16 V. The component exhibits a maximum resistance of 37 mΩ and supports fault currents up to 100 A. It operates within a temperature range of -40°C to +125°C with a 5.1 mm lead spacing.

Feature Summary

• High-temperature PTC design for reliable operation in elevated thermal environments
• Radial leaded construction for through-hole PCB mounting applications
• Resettable protection mechanism that automatically restores conductivity after fault clearance

Applications

• High-temperature electronic circuit protection
• Power supply input protection
• Industrial equipment overcurrent safeguarding

Procurement Notes

Verify specific availability status as distribution channels may indicate regional sales restrictions or limited stock conditions. Confirm RoHS compliance details directly via the manufacturer datasheet prior to procurement. Ensure the radial lead configuration matches the target PCB footprint requirements. Validate that the 16 V rating aligns with the system voltage specifications to prevent under-rating issues during operation.

Selection Notes

Select this component when circuit protection requires handling high ambient temperatures up to 125°C. The 5.5 A hold current suits applications needing substantial continuous current capacity without nuisance tripping. The 16 V rating limits suitability to low-voltage DC systems. Designers must account for the 37 mΩ initial resistance impact on power loss. The radial package dictates specific board layout constraints compared to surface-mount alternatives.

Part Context

This part belongs to the Bourns MF-RHT series of high-temperature PPTC resettable fuses. The series expands upon standard PTC offerings by utilizing materials engineered for superior thermal stability. This specific model represents a radial leaded variant optimized for robust mechanical integration in demanding industrial and automotive-grade environments where standard components might fail due to heat stress.

Replacement Considerations

Cross-reference with other MF-RHT series variants for different current ratings. Verify compatibility with alternative radial PPTC fuses from other manufacturers only if electrical parameters match exactly. No direct substitute part numbers are publicly confirmed in the provided documentation.