AUIRFU8403

Single FETs, MOSFETs Overview

The AUIRFU8403 is an automotive-grade N-channel enhancement-mode MOSFET from Infineon's COOLiRFET series. It features a 40 V drain-source breakdown voltage and a continuous drain current of 100 A. The device utilizes an IPAK (TO-251) through-hole package with three pins. Key electrical parameters include a maximum on-resistance of 4.2 mΩ, a gate threshold voltage range of 2.2 V to 3.9 V, and a typical gate charge of 42 nC at 10 V. It supports a junction temperature up to 175 °C and meets AEC-Q101 qualification standards.

Single FETs, MOSFETs Feature Summary

• Automotive reliability certified under AEC-Q101 standards for robust performance in vehicle environments.
• COOLiRFET technology provides low on-resistance and efficient thermal management.
• Enhanced gate robustness ensures stable operation under varying electrical loads.

Single FETs, MOSFETs Applications

• Automotive power distribution systems
• Motor control applications in vehicles
• High-current switching circuits

Single FETs, MOSFETs Procurement Notes

Verify the specific suffix and revision level against the official Infineon datasheet to ensure compatibility with design requirements. Confirm that the IPAK (TO-51) package dimensions match the target PCB footprint. Check for any end-of-life notices or recommended replacement parts if long-term supply stability is required for production.

Single FETs, MOSFETs Selection Notes

Select this component when a through-hole N-channel MOSFET with high current capability and automotive certification is needed. The 4.2 mΩ on-resistance balances conduction losses with cost-effectiveness. Ensure the driving circuit can handle the 42 nC gate charge for optimal switching performance within the specified temperature range.

Single FETs, MOSFETs Part Context

This part belongs to Infineon's COOLiRFET family, designed specifically for automotive applications requiring high reliability and efficiency. The AUI prefix indicates its automotive qualification status. It complements other variants in the series that offer different packages or resistance values to suit diverse power management needs in modern vehicles.

Single FETs, MOSFETs Replacement Considerations

Consult the official Infineon selection guide for direct replacements or pin-compatible alternatives within the COOLiRFET series. Verify that any substitute maintains the same AEC-Q101 certification and package type to ensure seamless integration without redesigning the PCB layout.