This part is a kind of semiconductor called K20J60U.
Function of this product has TK20J60U.
Manufacturers : Toshiba Semiconductor
Image and pinout :

Some of the text within the PDF file :
TK20J60U TOSHIBA Field Effect Transistor Silicon N Channel MOS Type (DTMOS ) TK20J60U Switching Regulator Applications • Low drain-source ON resistance: RDS (ON) = 0.165 (typ.) • High forward transfer admittance: ⎪Yfs⎪ = 12 S (typ.) • Low leakage current: IDSS = 100 A (VDS = 600 V) • Enhancement-mode: Vth = 3.0~5.0 V (VDS = 10 V, ID = 1 mA) Absolute Maximum Ratings (Ta = 25°C) 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 (Note 3) Repetitive avalanche energy Channel temperature Storage temperature range Symbol VDSS VGSS ID IDP PD EAS IAR EAR Tch Tstg Rating 600 ±30 20 40 190 144 20 19 1 [ ... ]
K20J60U PDF Datasheet Download
