This part is a kind of semiconductor called K3505-01MR.

Function of this product has 2SK3505-01MR.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

2SK3505-01MR Super FAP-G Series Features www.datasheet4u.com FUJI POWER MOSFET N-CHANNEL SILICON POWER MOSFET Outline Drawings TO-220F 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) Symbol Ratings Unit V V DS 500 A ID ±14 A ID(puls] ±56 V VGS ±30 A IAR *2 14 mJ EAS *1 242 kV/µs dVDS/dt *4 20 dV/dt *3 5 kV/µs PD Ta=25°C 2.1 W Tc=25°C 60 +150 Operating and storage Tch °C -55 to +150 temperature range Tstg °C *1 L=2.27mH, Vcc=50V *2 Tch < = BVDSS, Tch < = 150°C = -ID, -di/dt=50A/µs, Vcc < =150°C *3 IF< *4 VDS < = 500V Item Drain-source voltage Contin [ ... ]

K3505-01MR PDF Datasheet Download