The MCB40P10Y from Micro Commercial Components is a MOSFET with Continous Drain Current -40 A, Drain Source Resistance 42 to 62 milliohm, Drain Source Breakdown Voltage -100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -2.5 to -1 V. Tags: Surface Mount. More details for MCB40P10Y can be seen below.