The IRFZ34S from Vishay is a MOSFET with Continous Drain Current 30 A, Drain Source Resistance 50 milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for IRFZ34S can be seen below.