The BUK964R4-40B from Nexperia is a MOSFET with Continous Drain Current 75 A, Drain Source Resistance 3.6 to 8.3 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -15 to 15 V, Gate Source Threshold Voltage 0.5 to 2.3 V. Tags: Surface Mount. More details for BUK964R4-40B can be seen below.