The FTK40G10DFN33 from First Silicon is a MOSFET with Continous Drain Current 25.3 to 40 A, Drain Source Resistance 15 to 22.5 milli-ohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.0 to 3.0 V. Tags: Surface Mount. More details for FTK40G10DFN33 can be seen below.