This part is a kind of semiconductor called K1358.
Function of this product has 2SK1358.
Manufacturers : Toshiba Semiconductor
Image and pinout :
Some of the text within the PDF file :
TOSHIBA Discrete Semiconductors 2SK1358 Field Effect Transistor Silicon N Channel MOS Type (π-MOS II.5) High Speed, High Current DC-DC Converter, Relay Drive and Motor Drive Applications www.DataSheet4U.com Features Industrial Applications Unit in mm • Low Drain-Source ON Resistance - RDS(ON) = 1.1Ω (Typ.) • High Forward Transfer Admittance - Yfs = 4.0S (Typ.) • Low Leakage Current - IDSS = 300µA (Max.) @ VDS = 720V • Enhancement-Mode - Vth = 1.5 ~ 3.5V @ VDS = 10V, ID = 1mA Absolute Maximum Ratings (Ta = 25°C) CHARACTERISTIC Drain-Source Voltage Drain-Gate Voltage (RGS = 20kΩ) Gate-Source Voltage Drain Current DC Pulse Drain Power Dissipation (Tc = 25°C) Channel Temperature Storage Temperature Range SYMBOL VDSS VDGR VGSS ID IDP PD Tch Tstg RATING 900 900 ±30 9 [ ... ]