The IRF730AS from Vishay is a MOSFET with Continous Drain Current 5.5 A, Drain Source Resistance 1000 milliohm, Drain Source Breakdown Voltage 400 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4.5 V. Tags: Surface Mount. More details for IRF730AS can be seen below.