The STL190N4F7AG from STMicroelectronics is a MOSFET with Continous Drain Current 120 A, Drain Source Resistance 1.68 to 2 Milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for STL190N4F7AG can be seen below.