120 V, 70 A N-channel — the conduction-loss story
The Infineon IPD70N12S311ATMA1 is a 120 V, 70 A N-channel MOSFET from the OptiMOS™ series, built for automotive power switching where every milliohm of on-resistance matters.
Gate charge and switching — what 65 nC buys you
With a typical gate charge of 65 nC at 10 V, this MOSFET is not a high-speed switcher for 500 kHz+ converters — it is sized for PWM frequencies in the 20 kHz to 100 kHz range where the switching loss from charging and discharging the 4355 pF input capacitance is manageable.
Package reality — TO-252-3 on the board
The PG-TO252-3 (DPak) package is a single-gauge surface-mount tabbed device. The ±20 V max gate-source voltage means the gate is not fragile, but ESD handling is still required — a wrist strap and grounded workstation are the minimum.