This part is a kind of semiconductor called K2201.

Function of this product has 2SK2201.

Manufacturers : Toshiba

Image and pinout :

Some of the text within the PDF file :

2SK2201 TOSHIBA Field Effect Transistor Silicon N-Channel MOS Type (L2−π−MOSV) 2SK2201 Chopper Regulator, DC/DC Converter and Motor Drive Applications Unit: mm z 4 V gate drive z Low drain−source ON-resistance : RDS (ON) = 0.28 Ω (typ.) z High forward transfer admittance : |Yfs| = 3.5 S (typ.) z Low leakage current : IDSS = 100 μA (max) (VDS = 100 V) z Enhancement mode : Vth = 0.8~2.0 V (VDS = 10 V, ID = 1 mA) Absolute Maximum Ratings (Ta = 25°C) Characteristic Symbol Rating Unit Drain−source voltage Drain−gate voltage (RGS = 20 kΩ) Gate−source voltage Drain current DC (Note 1) Pulse (Note 1) Drain power dissipation (Tc = 25°C) Single-pulse avalanche energy (Note 2) Avalanche current Repetitive avalanche energy (Note 3) Channel temperature Storag [ ... ]

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