This post explains for the semiconductor 2SK3563.
The Part Number is K3563.
The function of this semiconductor is 500V, MOSFET.
Manufacturers : Toshiba Semiconductor
Preview images :
The K3563 is Silicon N Channel MOS Type Field Effect Transistor.
1. Low drain-source ON resistance: RDS (ON) = 1.35Ω (typ.)
2. High forward transfer admittance: |Yfs| = 3.5S (typ.)
3. Low leakage current: IDSS = 100 μA (VDS = 500 V)
4. Enhancement-mode: Vth = 2.0~4.0 V (VDS = 10 V, ID = 1 mA)
6. Storage temperature : Tstg = -55 to +150 °C
1. Switching Regulator