The BUK7K18-40E from Nexperia is a MOSFET with Continous Drain Current 22 to 24.2 A, Drain Source Resistance 15.5 to 37.4 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.4 to 4.5 V. Tags: Surface Mount. More details for BUK7K18-40E can be seen below.