The UN0412N2R0-PD56 from UN Semiconductor is a MOSFET with Continous Drain Current 125 A, Drain Source Resistance 2.0 to 3.2 milli-ohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -12 to 20 V, Gate Source Threshold Voltage 2 to 4.0 V. Tags: Surface Mount. More details for UN0412N2R0-PD56 can be seen below.