AUIRFS8409

Single FETs, MOSFETs Overview

The AUIRFS8409 is an N-channel enhancement mode MOSFET from the Infineon COOLiRFET series, designed for automotive applications. It features a 40 V drain-source voltage rating and supports continuous drain currents of 240 A (silicon limited) and 522 A (package limited). The device utilizes a D2PAK (TO-263) surface-mount package with seven pins. Key electrical parameters include a maximum on-resistance of 750 μΩ, a gate threshold voltage range of 2.2 V to 3.9 V, and a typical gate charge of 305 nC at 10 V. It operates within a temperature range of -55 °C to +175 °C with a maximum power dissipation of 375 W.

Single FETs, MOSFETs Feature Summary

• Automotive-grade reliability with repetitive avalanche capability up to maximum junction temperature
• Advanced process technology achieving ultra-low on-resistance per silicon area
• Fast switching characteristics combined with ruggedized device design

Single FETs, MOSFETs Applications

• Automotive power management systems
• High-current DC-DC conversion circuits
• Motor control applications requiring low conduction losses

Single FETs, MOSFETs Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the specific ordering suffix matches the required package and tape-and-reel specifications. Ensure compliance with RoHS directives and lead-free manufacturing standards as documented in the official datasheet. Cross-reference the manufacturer part number against current product lifecycle status to confirm availability.

Single FETs, MOSFETs Selection Notes

Select this component for designs requiring high current handling in compact surface-mount footprints. Evaluate thermal management requirements given the 375 W power dissipation rating. Consider the 7-pin D2PAK configuration for improved heat sinking compared to standard 3-terminal packages. Verify gate drive compatibility with the specified threshold voltage range for optimal switching performance.

Single FETs, MOSFETs Part Context

This device belongs to the COOLiRFET family, which integrates advanced silicon technologies for reduced on-resistance. It is manufactured by Infineon Technologies, formerly International Rectifier. The part is specifically engineered to meet the stringent reliability and performance demands of modern automotive electronics, offering superior efficiency compared to conventional power MOSFETs.

Single FETs, MOSFETs Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify pinout compatibility and electrical parameter equivalence before implementation.