The MSJU05N90A from Micro Commercial Components is a MOSFET with Continous Drain Current 5 A, Drain Source Resistance 1260 to 1490 milliohm, Drain Source Breakdown Voltage 900 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for MSJU05N90A can be seen below.