This part is a kind of semiconductor called K12A60D.

Function of this product has TK12A60D.

Manufacturers : Toshiba Semiconductor

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Some of the text within the PDF file :

TK12A60D TOSHIBA Field Effect Transistor Silicon N Channel MOS Type (π-MOSⅦ) TK12A60D Switching Regulator Applications Ф3.2 ± 0.2 10 ± 0.3 Unit: mm 2.7 ± 0.2 A 3.9 3.0 1.14 ± 0.15 2.8 MAX. 2.54 1 2 3 2.6 ± 0.1 0.69 ± 0.15 Ф0.2 M A • • • • Low drain-source ON resistance: RDS (ON) = 0.45 Ω (typ.) High forward transfer admittance: ⎪Yfs⎪ = 7.5 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) Absolute Maximum Ratings (Ta = 25°C) Characteristics Drain-source voltage Gate-source voltage Drain current DC Pulse (Note 1) (Note 1) Symbol VDSS VGSS ID IDP PD EAS IAR EAR Tch Tstg Rating 600 ±30 12 48 45 359 12 4.5 150 −55 to 150 Unit 2.54 0.64 ± 0.15 V V A W mJ A mJ °C °C 13 ± 0.5 15.0 [ ... ]

K12A60D PDF Datasheet Download