This part is a kind of semiconductor called K1305.

Function of this product has 2SK1305.

Manufacturers : Hitachi

Image and pinout :

Some of the text within the PDF file :

2SK1305 Silicon N-Channel MOS FET Application High speed power switching Features • Low on-resistance • High speed switching • Low drive current • 4 V gate drive device  Can be driven from 5 V source • Suitable for motor drive, DC-DC converter, power switch and solenoid drive Outline TO-220FM D 12 3 1. Gate G 2. Drain 3. Source S 2SK1305 Absolute Maximum Ratings (Ta = 25°C) Item Drain to source voltage Gate to source voltage Drain current Drain peak current Body to drain diode reverse drain current Channel dissipation Channel temperature Storage temperature Notes: 1. PW ≤ 10 µs, duty cycle ≤ 1% 2. Value at TC = 25°C Symbol VDSS VGSS ID I *1 D(pulse) I DR Pch*2 Tch Tstg Ratings 100 ±20 10 40 10 25 150 –55 to +150 Unit V V A A A W °C °C 2 2SK1305 Electrical [ ... ]

K1305 PDF Datasheet Download