The BUK7Y4R4-40E from Nexperia is a MOSFET with Continous Drain Current 92 to 100 A, Drain Source Resistance 3.3 to 8.7 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 4.5 V. Tags: Surface Mount. More details for BUK7Y4R4-40E can be seen below.