The MCU45P03A from Micro Commercial Components is a MOSFET with Continous Drain Current -45 A, Drain Source Resistance 4.8 to 13 milliohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -25 to 25 V, Gate Source Threshold Voltage -2.8 to -1.2 V. Tags: Surface Mount. More details for MCU45P03A can be seen below.