The 2SK3577 from Renesas is a MOSFET with Continous Drain Current -3.5 to 3.5 A, Drain Source Resistance 50 to 91 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -12 to 12 V, Gate Charge 3 nC. Tags: Surface Mount. More details for 2SK3577 can be seen below.