AUIRFU8401

Single FETs, MOSFETs Overview

The AUIRFU8401 is an N-channel enhancement mode power MOSFET from the COOLiRFET series, manufactured by Infineon Technologies (formerly International Rectifier). It features a maximum drain-source voltage of 40 V and a continuous drain current of 100 A. The device utilizes IPAK (TO-251) through-hole packaging 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 maximum power dissipation of 79 W and operates within a temperature range of -55 °C to +175 °C.

Single FETs, MOSFETs Feature Summary

• Automotive-grade qualification for reliable operation in demanding environments
• Advanced process technology enabling ultra-low on-resistance per silicon area
• Ruggedized design allowing repetitive avalanche energy up to maximum junction temperature
• Fast switching characteristics combined with high thermal stability

Single FETs, MOSFETs Applications

• Automotive power management systems
• Low-side switching applications
• DC-DC converter circuits
• Motor control interfaces

Single FETs, MOSFETs Procurement Notes

Verify the manufacturer designation as Infineon Technologies, noting the historical association with International Rectifier. Confirm the specific suffix indicates the IPAK (TO-251) through-hole package variant. Ensure compliance with RoHS standards and automotive quality requirements matches project specifications. Cross-reference the part number against official Infineon databases to confirm current production status and datasheet revisions before procurement.

Single FETs, MOSFETs Selection Notes

Select this component for designs requiring robust automotive-grade performance with moderate voltage ratings. The 40 V rating suits low-voltage DC systems. The TO-251 package facilitates through-hole mounting, suitable for prototyping or specific mechanical constraints. Evaluate thermal management needs given the 79 W dissipation limit and 175 °C operating capability. Compare gate charge requirements against driver capabilities to ensure efficient switching performance.

Single FETs, MOSFETs Part Context

This device belongs to the HEXFET and COOLiRFET families, representing Infineon's specialized power MOSFET technologies optimized for efficiency and ruggedness. The 'AU' prefix typically denotes automotive grade qualification. As a single N-channel enhancement mode transistor, it serves as a fundamental switching element in power electronics, leveraging silicon-based fabrication techniques for high current handling and low conduction losses.

Single FETs, MOSFETs Replacement Considerations

Direct substitutes within the same family include AUIRFR8401 (DPAK surface mount) and AUIRFSL8401 (TO-262 surface mount), which share identical electrical characteristics but differ in package type. Verify pinout compatibility and thermal resistance differences when transitioning between IPAK, DPAK, and TO-262 packages.