The 2SK3899-ZK from Renesas is a MOSFET with Continous Drain Current -84 to 84 A, Drain Source Resistance 4.2 to 6.5 milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Charge 96 nC. Tags: Surface Mount. More details for 2SK3899-ZK can be seen below.