The BUY15CS57A-01(ES) from Infineon Technologies is a MOSFET with Continous Drain Current 57 A, Drain Source Resistance 9 to 20 Milliohm, Drain Source Breakdown Voltage 150 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.5 to 5 V. Tags: Surface Mount. More details for BUY15CS57A-01(ES) can be seen below.