0.6 mOhm at 100 A — conduction-loss floor for high-current rails
The IST006N04NM6AUMA1 is an Infineon OptiMOS™ 6 N-channel MOSFET rated for 40 V drain-source and a maximum on-resistance of 0.6 mOhm at 100 A, 10 V drive. That Rds(on) figure defines the conduction loss in a 12 V or 24 V bus rail — at 100 A the dissipation is just 6 W, leaving most of the 250 W case-rated power budget for switching losses. The 475 A continuous drain current at case temperature (Tc) reflects a large die optimised for current density; the 58 A Ta rating is the board-level limit without a heatsink. Practical designs will thermally anchor the PG-HSOF-5-1 package to a copper plane or heatsink to exploit the Tc rating.
Gate charge and switching speed
Total gate charge Qg is 178 nC at 10 V. At a 100 kHz switching frequency the average gate-drive current required is 17.8 mA — within the capability of most dedicated MOSFET drivers, but the 8800 pF input capacitance at 20 V means the driver must source a brief 8.8 A peak during the Miller plateau. A 6 V drive voltage is the minimum for the rated Rds(on); 10 V yields the full enhancement.
175 °C junction — automotive and industrial temperature grade
The -55 to 175 °C operating junction range qualifies this part for under-hood automotive, industrial motor drives, and high-ambient power supplies. The 3.8 W Ta / 250 W Tc power dissipation split means the board-level copper area and airflow set the real thermal limit — the die itself can handle 250 W if the case is held at 25 °C.