The STN1NF20 from STMicroelectronics is a MOSFET with Continous Drain Current 1 A, Drain Source Resistance 1.1 to 1.5 Milliohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for STN1NF20 can be seen below.