The VS4504AD from JSMicro Semiconductor is a MOSFET with Continous Drain Current -80 A, Drain Source Resistance 11.5 to 22 milli-ohm, Drain Source Breakdown Voltage -40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1.0 to -2.5 V. Tags: Surface Mount. More details for VS4504AD can be seen below.