40 V, 108 A N-channel HEXFET® in a DirectFET Isometric M4 package
The Infineon AUIRF7736M2TR is a 40 V N-channel MOSFET from the HEXFET® series, built on a metal-oxide trench process. It delivers a continuous drain current of 108 A at the case (Tc) and 22 A at ambient (Ta), with a maximum Rds(on) of 3 mOhm at 65 A and 10 V gate drive.
The DirectFET package is a proprietary Infineon footprint — no direct pin-compatible second source exists in the ledger, so dual-sourcing would require a board redesign if a second source is needed.
Mounting and thermal handling for the DirectFET package
The DirectFET Isometric M4 is a can-style package with solderable pads on the bottom and a exposed metal top. Reflow solder per the recommended land pattern; the datasheet covers the stencil aperture and paste volume. The top-side clip can be heatsunk or left exposed for convective cooling. The 2.5 W dissipation at ambient (Ta) assumes no heatsink; the 63 W at the case (Tc) requires a thermal path through the PCB or an external heatsink attached to the can.
