This part is a kind of semiconductor called K2749.

Function of this product has 2SK2749.

Manufacturers : Toshiba

Image and pinout :

Some of the text within the PDF file :

2SK2749 TOSHIBA Field Effect Transistor Silicon N Channel MOS Type (π−MOSIII) 2SK2749 Chopper Regulator, DC−DC Converter and Motor Drive Applications z Low drain−source ON resistance z High forward transfer admittance z Low leakage current z Enhancement mode : RDS (ON) = 1.6 Ω (typ.) : |Yfs| = 5.0 S (typ.) Unit: mm : IDSS = 100 μA (max) (VDS = 720 V) : Vth = 2.0~4.0 V (VDS = 10 V, ID = 1 mA) Absolute Maximum Ratings (Ta = 25°C) Characteristics Drain−source voltage Drain−gate voltage (RGS = 20 kΩ) Gate−source voltage Drain current DC (Note 1) Symbol VDSS VDGR VGSS ID IDP PD EAS IAR EAR Tch Tstg Rating 900 900 ±30 7 21 150 682 7 15 150 −55~150 Unit V V V A W mJ A mJ °C °C 1. GATE 2. DRAIN (HEAT SINK) 3. SOURCE Pulse (Note 1) Drain power dissip [ ... ]

K2749 PDF Datasheet Download