This part is a kind of semiconductor called K4A60DB.

Function of this product has TK4A60DB.

Manufacturers : Toshiba Semiconductor

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Some of the text within the PDF file :

TK4A60DB TOSHIBA Field Effect Transistor Silicon N Channel MOS Type (π-MOSⅦ) TK4A60DB Switching Regulator Applications • Low drain-source ON-resistance: RDS (ON) = 1.6Ω(typ.) • High forward transfer admittance: |Yfs| = 2.2 S (typ.) • Low leakage current: IDSS = 10 μA (max) (VDS = 600V) • Enhancement mode: Vth = 2.4 to 4.4 V (VDS = 10 V, ID = 1 mA) Ф3.2 ± 0.2 10 ± 0.3 A Unit: mm 2.7 ± 0.2 3.9 3.0 15.0 ± 0.3 1.14 ± 0.15 2.8 MAX. 13 ± 0.5 Absolute Maximum Ratings (Ta = 25°C) 0.69 ± 0.15 Ф0.2 M A 2.6 ± 0.1 4.5 ± 0.2 Characteristics Drain-source voltage Gate-source voltage Drain current DC (Note 1) Pulse (t = 1 ms) (Note 1) Drain power dissipation (Tc = 25°C) Single pulse avalanche energy (Note 2) Avalanche current Repetitive avalanche energy (Note 3 [ ... ]

K4A60DB PDF Datasheet Download