The UN0419N1R7-PD56 from UN Semiconductor is a MOSFET with Continous Drain Current 190 A, Drain Source Resistance 1.7 to 3.4 milli-ohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 5.0 V. Tags: Surface Mount. More details for UN0419N1R7-PD56 can be seen below.