The STH2N120K5-2AG from STMicroelectronics is a MOSFET with Continous Drain Current 1.5 A, Drain Source Resistance 7250 to 10000 Milliohm, Drain Source Breakdown Voltage 1200 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for STH2N120K5-2AG can be seen below.