The STV270N4F3 from STMicroelectronics is a MOSFET with Continous Drain Current 270 A, Drain Source Resistance 1.25 to 1.5 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 STV270N4F3 can be seen below.