The FDMD8540L from onsemi is a MOSFET with Continous Drain Current 156 A, Drain Source Resistance 1.5 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 3 V. Tags: Surface Mount. More details for FDMD8540L can be seen below.