The MCAC50P03B from Micro Commercial Components is a MOSFET with Continous Drain Current -50 A, Drain Source Resistance 4 to 9.5 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 MCAC50P03B can be seen below.