The 2SK3199 from Sanken Electric is a MOSFET with Continous Drain Current -5 to 5 A, Drain Source Resistance 1.2 to 1.5 Ohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for 2SK3199 can be seen below.