The SiA519EDJ from Vishay is a MOSFET with Continous Drain Current 4.5 A, Drain Source Resistance 32 to 137 Milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage -1.4 to -0.5 V. Tags: Surface Mount. More details for SiA519EDJ can be seen below.