The 2SJ687-ZK from Renesas is a MOSFET with Continous Drain Current -20 to 20 A, Drain Source Resistance 5.4 to 20 milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -12 to 12 V, Gate Charge 57 nC. Tags: Surface Mount. More details for 2SJ687-ZK can be seen below.