This part is a kind of semiconductor called 2SK214.
Function of this product has Silicon N-Channel MOS FET.
Manufacturers : Hitachi Semiconductor
Image and pinout :

Some of the text within the PDF file :
2SK213, 2SK214, 2SK215, 2SK216 Silicon N-Channel MOS FET Application High frequency and low frequency power amplifier, high speed switching. Complementary pair with 2SJ76, J77, J78, J79 Features • • • • Suitable for direct mounting High forward transfer admittance Excellent frequency response Enhancement-mode Outline TO-220AB D G 1 2 3 1. Gate 2. Source (Flange) 3. Drain S 2SK213, 2SK214, 2SK215, 2SK216 Absolute Maximum Ratings (Ta = 25°C) Item Drain to source voltage 2SK213 2SK214 2SK215 2SK216 Gate to source voltage Drain current Body to drain diode reverse drain current Channel dissipation VGSS ID I DR Pch Pch* Channel temperature Storage temperature Note: 1. Value at TC = 25°C Tch Tstg 1 Symbol VDSX Ratings 140 160 180 200 ±15 500 500 1.75 30 150 –45 to +150 U [ ... ]
2SK214 PDF Datasheet Download
