40 V, 80 A N-channel — STripFET III in TO-220
Junction temperature range — what it tells you
This makes the part suitable for environments with wide thermal swings — under-hood automotive, industrial motor drives in unventilated cabinets, or power supplies near heat sources. The 175°C maximum junction allows higher continuous current operation when properly heatsunk, but the 110 W power dissipation limit at the case must be respected in the thermal design.
Gate drive and switching parameters
The gate threshold voltage is specified at 4 V maximum with 250 µA drain current, and the drive voltage for achieving minimum on-resistance is 10 V. Total gate charge is 54 nC at 10 V, a moderate figure that keeps gate-drive losses in check at switching frequencies up to several hundred kilohertz. Input capacitance is 2200 pF at 25 V drain-source, which influences the drive circuit design — a 10-15 ohm gate resistor is typical to control ringing without slowing the edge too much. The maximum gate-source voltage is ±20 V, so the drive rail should be regulated to avoid exceeding this during transients.