The IRF830B from Vishay is a MOSFET with Continous Drain Current 5.3 A, Drain Source Resistance 1500 milliohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Through Hole, Surface Mount. More details for IRF830B can be seen below.