This part is a kind of semiconductor called K3699.

Function of this product has 2SK3699.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

2SK3699-01MR FUJI POWER MOSFET N-CHANNEL SILICON POWER MOSFET Outline Drawings [mm] TO-220F 200305 Super FAP-G Series Features High speed switching Low on-resistance No secondary breadown Low driving power Avalanche-proof Applications Switching regulators UPS (Uninterruptible Power Supply) DC-DC converters Maximum ratings and characteristicAbsolute maximum ratings (Tc=25°C unless otherwise specified) Item Drain-source voltage Continuous drain current Pulsed drain current Gate-source voltage Repetitive or non-repetitive Maximum Avalanche Energy Maximum Drain-Source dV/dt Peak Diode Recovery dV/dt Max. power dissipation Operating and storage temperature range Isolation Voltage Symbol Ratings V DS 900 VDSX *5 900 ±3.7 ID ID(puls] ±14.8 VGS ±30 IAR *2 3.7 EAS *1 171 [ ... ]

K3699 PDF Datasheet Download