The STE40NC60 from STMicroelectronics is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 98 to 130 Milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Chassis Mount. More details for STE40NC60 can be seen below.