What the 40 V, 195 A, 1.7 mOhm ratings mean for your power stage
The AUIRLS3034TRL is an N-channel HEXFET power MOSFET rated for a maximum drain-source voltage of 40 V and a continuous drain current of 195 A. The 162 nC gate charge at Vgs = 4.5 V tells the gate-driver designer how much charge must be moved per switching cycle — a driver sourcing 2 A can charge the gate in roughly 81 ns, but the actual switching loss depends on the driver's sink/source capability and the external gate resistance.