This post explains for the semiconductor K11A60D.
The Part Number is K11A60D.
The function of this semiconductor is TK11A60D.
Manufacturers : Toshiba Semiconductor
Preview images :
Switching Regulator Applications
• Low drain-source ON resistance: RDS (ON) = 0.54 Ω (typ.)
• High forward transfer admittance: ⎪Yfs⎪ = 6.0 S (typ.)
• Low leakage current: IDSS = 10 μA (max) (VDS = 600 V)
• Enhancement-mode: Vth = 2.0 to 4.0 V (VDS = 10 V, ID = 1 mA)