MF-RG900-AP

Overview

The Bourns MF-RG900-AP is a radial leaded PTC resettable fuse designed for overcurrent protection in low-voltage circuits. It features a maximum voltage rating of 16 VDC and a hold current of 9.0 A, with a trip current of 18.0 A. The device exhibits an initial resistance of 4 mΩ minimum and a post-trip resistance of 15 mΩ maximum. It operates within a temperature range of -40°C to +85°C and complies with the AEC-Q200 automotive qualification standard.

Feature Summary

• Provides passive, non-volatile circuit protection without requiring external control logic or firmware intervention.
• Features fast tripping characteristics suitable for demanding automotive applications.
• Complies with AEC-Q200 automotive-grade qualification standards for reliability.

Applications

• Automotive electronic circuit protection
• Low-voltage power supply overcurrent protection
• Consumer electronics circuit safeguarding

Procurement Notes

Verify that the specific part number suffix matches the required packaging configuration, as variations exist between tape-and-reel and ammo pack formats. Confirm that the 16VDC voltage rating aligns with the target circuit design, as this component is not rated for higher voltage systems. Ensure that the 9A hold current meets the operational requirements of the protected load without nuisance tripping during normal operation.

Selection Notes

Select this component when designing circuits requiring robust automotive-grade protection with high current handling capabilities up to 9A. The radial leaded package facilitates through-hole mounting on PCBs where space constraints allow. Consider the 16VDC limit strictly; do not use in higher voltage applications. The AEC-Q200 compliance makes it suitable for environments requiring strict automotive reliability standards compared to general industrial components.

Part Context

This device belongs to the Bourns MF-RG series of PTC resettable fuses, which are specifically engineered for automotive applications. The series emphasizes compactness and fast response times while maintaining high current ratings. The MF-RG900-AP represents a high-current variant within this lineup, distinguished by its 9A hold current and 16VDC rating, differentiating it from lower-current or higher-voltage siblings in the broader Multifuse product family.

Replacement Considerations

Direct substitutes include other MF-RG series variants with matching electrical parameters, such as the MF-RG900-AP-14, provided the packaging difference does not impact assembly. Cross-series replacements require careful verification of voltage, current, and resistance values to ensure circuit compatibility and safety margins are maintained without altering the protection profile.