MF-RHT700-AP

Overview

The Bourns MF-RHT700-AP is a high-temperature polymeric positive temperature coefficient (PPTC) resettable fuse from the MF-RHT series, designed for robust circuit protection in demanding thermal environments. It features radial through-hole mounting with a lead spacing of 10.2 mm and operates within an extended temperature range of -40°C to +125°C. The device maintains a holding current of 7 A and trips at 14 A, supporting a maximum voltage of 30 VDC. It offers a high fault current rating of up to 40 A with a typical resistance of 20 mΩ, ensuring low power loss during normal operation while providing reliable overcurrent protection.

Feature Summary

• High-temperature capability rated for continuous operation up to +125°C
• Radial through-hole construction suitable for PCB mounting
• Self-resetting mechanism restores conductivity after fault clearance

Applications

• Automotive electronics requiring high thermal stability
• Industrial control systems exposed to elevated temperatures
• Power supply circuits needing overcurrent protection

Procurement Notes

Verify that the specific suffix '-AP' aligns with your required packaging or tape-and-reel specifications as defined by Bourns documentation. Confirm that the operating environment does not exceed the +125°C maximum junction temperature limit. Ensure the PCB layout accommodates the 10.2 mm lead spacing and provides adequate airflow for thermal management. Cross-reference the datasheet for derating curves applicable to your specific ambient temperature conditions.

Selection Notes

Select this component when standard PPTC fuses fail to withstand high ambient temperatures. The MF-RHT series is engineered for applications where thermal endurance is critical, such as under-hood automotive or industrial machinery. Compare the 7 A holding current against your circuit's nominal load to ensure proper tripping characteristics. Consider the 30 VDC voltage rating relative to your system's maximum potential. Evaluate the physical dimensions against available board space.

Part Context

This part belongs to the MF-RHT series, which extends the standard MF-R line with enhanced thermal performance. While similar to other Bourns resettable fuses, the RHT variant specifically addresses high-temperature reliability. It complements the broader MF family by offering solutions for harsher environments without sacrificing the self-resetting convenience of PPTC technology.

Replacement Considerations

Consult official Bourns substitution guides for direct equivalents. Generic PPTC replacements may lack the specific +125°C rating or exact dimensional profile. Verify that any substitute matches the 7 A holding current and 30 VDC rating precisely to maintain circuit integrity.