The SiSA66DN-T1-GE3 from Vishay is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 1.9 to 3.1 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -16 to 20 V, Gate Source Threshold Voltage 1 to 2.2 V. Tags: Surface Mount. More details for SiSA66DN-T1-GE3 can be seen below.