The BUK7M9R5-40H from Nexperia is a MOSFET with Continous Drain Current 38.5 to 40 A, Drain Source Resistance 5.8 to 18.4 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 BUK7M9R5-40H can be seen below.