The MCQD12N03A from Micro Commercial Components is a MOSFET with Continous Drain Current 12 A, Drain Source Resistance 9 to 15 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for MCQD12N03A can be seen below.