The BUK9Y53-100B from Nexperia is a MOSFET with Continous Drain Current 16 to 23 A, Drain Source Resistance 41 to 132 milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -15 to 15 V, Gate Source Threshold Voltage 0.5 to 2.3 V. Tags: Surface Mount. More details for BUK9Y53-100B can be seen below.