The SHD219603 from Sensitron Semiconductor is a MOSFET with Continous Drain Current 50 A, Drain Source Resistance 0.045 ohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.0 to 4.0 V. Tags: Surface Mount. More details for SHD219603 can be seen below.