The SiA437DJ from Vishay is a MOSFET with Continous Drain Current 29.7 A, Drain Source Resistance 12 to 65 Milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -8 to 8 V, Gate Source Threshold Voltage -0.9 to -0.4 V. Tags: Surface Mount. More details for SiA437DJ can be seen below.