The JSM4N60C from JSMicro Semiconductor is a MOSFET with Continous Drain Current 2.5 to 4.0 A, Drain Source Resistance 2.1 to 2.5 ohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.0 to 4.0 V. Tags: Through Hole. More details for JSM4N60C can be seen below.