The P4F90VX3 from Shindengen America is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 2800 to 3600 milliohm, Drain Source Breakdown Voltage 900 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 4 V. Tags: Through Hole. More details for P4F90VX3 can be seen below.