This part is a kind of semiconductor called 2SK4013.

Function of this product has Switching Regulator Applications.

Manufacturers : Toshiba Semiconductor

Image and pinout :

Some of the text within the PDF file :

2SK4013 TOSHIBA Field Effect Transistor Silicon N Channel MOS Type (π-MOSⅣ) 2SK4013 Switching Regulator Applications • • • • Low drain-source ON resistance: RDS (ON) = 1.35 Ω (typ.) High forward transfer admittance: |Yfs| = 5.0 S (typ.) Low leakage current: IDSS = 100 μA (max) (VDS = 640 V) Enhancement-model: Vth = 2.0 to 4.0 V (VDS = 10 V, ID = 1 mA) Unit: mm Absolute Maximum Ratings (Ta = 25°C) Characteristics Drain-source voltage Drain-gate voltage (RGS = 20 kΩ) Gate-source voltage Drain current DC Pulse (Note 1) (Note 1) Symbol VDSS VDGR VGSS ID IDP PD EAR IAR EAR Tch Tstg Rating 800 800 ±30 6 18 45 317 6 4.5 150 −55 to 150 Unit V V V A W mJ A mJ °C °C 1: Gate 2: Drain 3: Source Drain power dissipation (Tc = 25°C) Single pulse avalanche en [ ... ]

2SK4013 PDF Datasheet Download