The 2SC3228-Y transistor can have a current gain of 160 to 320. The gain of the 2SC3228 will be in the range from 60 to 320, for the 2SC3228-R it will be in the range from 60 to 120.
The DMG2302U-7 is 20V 4.2A 800 mW SOT23 Package. This N channel MOSFET transistor operates in enhancement mode. This MOSFET transistor has an operating temperature range of -55 °C to 150 °C.