The MCU45P04A from Micro Commercial Components is a MOSFET with Continous Drain Current -45 A, Drain Source Resistance 15 to 23 milliohm, Drain Source Breakdown Voltage -40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -2.5 to -1 V. Tags: Surface Mount. More details for MCU45P04A can be seen below.