The SiA938DJT from Vishay is a MOSFET with Continous Drain Current 4.5 A, Drain Source Resistance 17 to 48 Milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage 0.6 to 1.5 V. Tags: Surface Mount. More details for SiA938DJT can be seen below.