The MJD122 with Darlington Transistors NPN 8A 100V TO-252-2 (DPAK) RoHS manufactured by Changjiang is a power transistor. It is designed to switch electrical current from a Collector to an Emitter. This transistor features a NPN type Darlington configuration, which creates a high power amplification factor to increase the strength of the switch. It can handle up to 8A of current with a voltage of 100V, and its TO-252-2 (DPAK) package allows it to be installed on a board with surface mounting. The device is also RoHS compliant, which ensures that it meets all environmental and health regulations.