The BUK7Y1R4-40H from Nexperia is a MOSFET with Continous Drain Current 190 to 190 A, Drain Source Resistance 0.74 to 3.05 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -10 to 20 V, Gate Source Threshold Voltage 1 to 4.3 V. Tags: Surface Mount. More details for BUK7Y1R4-40H can be seen below.