The STL70N4LLF5 from STMicroelectronics is a MOSFET with Continous Drain Current 70 A, Drain Source Resistance 6.1 to 9 Milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -22 to 22 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for STL70N4LLF5 can be seen below.