The MKE 38P600LB from Littelfuse is a MOSFET with Continous Drain Current 50 A, Drain Source Resistance 45 milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 3.5 V. Tags: Surface Mount. More details for MKE 38P600LB can be seen below.