The IRHF57Z30 from Infineon Technologies is a MOSFET with Continous Drain Current 12 A, Drain Source Resistance 45 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for IRHF57Z30 can be seen below.