The IRF610S from Vishay is a MOSFET with Continous Drain Current 2.1 to 3.3 A, Drain Source Resistance 1.5 milliohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for IRF610S can be seen below.