The SiHD5N50D from Vishay is a MOSFET with Continous Drain Current 5.3 A, Drain Source Resistance 1200 to 1500 Milliohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Surface Mount. More details for SiHD5N50D can be seen below.