The STP4NK60Z from STMicroelectronics is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 1700 to 2000 Milliohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 4.5 V. Tags: Through Hole. More details for STP4NK60Z can be seen below.