The FDMC7660DC from onsemi is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 2.2 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 V. Tags: Surface Mount. More details for FDMC7660DC can be seen below.