This part is a kind of semiconductor called C4706.

Function of this product has 2SC4706.

Manufacturers : Sanken electric

Image and pinout :

Some of the text within the PDF file :

2SC4706 Silicon NPN Triple Diffused Planar Transistor (High Voltage Switchihg Transistor) sAbsolute maximum ratings (Ta=25°C) Symbol VCBO VCEO VEBO IC IB PC Tj Tstg 2SC4706 900 600 7 14(Pulse28) 7 130(Tc=25°C) 150 –55to+150 Unit V V V A A W °C °C Application : Switching Regulator and General Purpose (Ta=25°C) 2SC4706 100max 100max 600min 10 to 25 0.5max 1.2max 6typ 160typ V MHz pF 20.0min 4.0max sElectrical Characteristics Symbol ICBO IEBO V(BR)CEO hFE VCE(sat) VBE(sat) fT COB Conditions VCB=800V VEB=7V IC=10mA VCE=4V, IC=7A IC=7A, IB=1.4A IC=7A, IB=1.4A VCE=12V, IE=–1.5A VCB=10V, f=1MHz External Dimensions MT-100(TO3P) 5.0±0.2 15.6±0.4 9.6 2.0 1.8 4.8±0.2 2.0±0.1 Unit µA µA 19.9±0.3 V 4.0 a b ø3.2±0.1 V 2 3 1.05 +0.2 -0.1 0.65 +0.2 -0.1 1.4 sTypical Switching [ ... ]

C4706 PDF Datasheet Download