The KO3402 is a MOSFET N Channel with rated voltage of 30V, rated current of 4A, threshold voltage of 1.4V, gate charge of 250uA, gate-source resistance of 55mO at 4A and 10V, and package type of SOT23-3 RoHS. It is manufactured by Kexin. It is used as an electronic switch to control current through a load. It is mainly used in applications such as automotive, consumer electronics, industrial and communication.