MF-RHT400-AP

Overview

The Bourns MF-RHT400-AP is a radial leaded PolySwitch resettable fuse from the MF-RHT series, designed for high-temperature environments. It features a hold current of 4.0 A and a trip current of 8.0 A. The device supports a maximum voltage of 16 VDC and has a typical resistance of 240 mOhms. It operates within a temperature range of -40°C to +125°C and carries AEC-Q200 automotive qualification.

Feature Summary

• Provides overcurrent protection through automatic circuit interruption upon thermal activation
• Maintains stable electrical performance in elevated temperature operating conditions
• Offers reliable re-closing capability after fault condition removal without replacement

Applications

• Automotive electronics circuits requiring AEC-Q200 compliance
• High-temperature industrial control systems
• Consumer electronic power input protection

Procurement Notes

Verify the specific suffix against official Bourns documentation to confirm availability and exact specifications. Ensure the selected variant matches the required hold current and voltage ratings for the target application. Cross-reference the datasheet for any recent product changes or obsolescence notices before finalizing procurement plans.

Selection Notes

Select this component when the application demands a resettable fuse capable of withstanding continuous operation at temperatures up to 125°C. The 4.0 A hold current rating suits moderate current loads, while the 16 VDC maximum voltage limits its use to low-voltage DC circuits. Confirm that the radial leaded package fits the PCB layout constraints.

Part Context

This part belongs to the MF-RHT series of high-temperature PPTC resettable fuses manufactured by Bourns Inc. The series is engineered for robustness in demanding environments, distinguishing it from standard temperature rated counterparts. It serves as a protective element within larger electronic assemblies where space and thermal management are critical factors.

Replacement Considerations

Direct substitutes include other MF-RHT series variants with matching 4.0 A hold current and 16 VDC ratings. Verify that alternative parts maintain the same AEC-Q200 qualification and radial leaded form factor to ensure mechanical and electrical compatibility.