This part is a kind of semiconductor called C4512.

Function of this product has 2SC4512.

Manufacturers : Sanken Electric

Image and pinout :

Some of the text within the PDF file :

2SC4512 Silicon NPN Triple Diffused Planar Transistor (Complement to type 2SA1726) sAbsolute maximum ratings (Ta=25°C) Symbol VCBO VCEO VEBO IC IB PC Tj Tstg Ratings 120 80 6 6 3 50(Tc=25°C) 150 –55 to +150 Unit V V V A A W °C °C Application : Audio and General Purpose (Ta=25°C) Ratings 10max 10max 80min 50min 0.5max 20typ 110typ V MHz pF 12.0min sElectrical Characteristics Symbol ICBO IEBO V(BR)CEO hFE VCE(sat) fT COB ∗hFE Rank Conditions VCB=120V VEB=6V IC=25mA VCE=4V, IC=2A IC=5A, IB=0.2A VCE=12V, IE=–0.5A VCB=10V, f=1MHz External Dimensions MT-25(TO220) 3.0±0.2 10.2±0.2 4.8±0.2 2.0±0.1 Unit µA µA 16.0±0.7 V 8.8±0.2 a b ø3.75±0.2 O(50 to100), P(70 to140), Y(90 to180) 2.5 B C E 4.0max 1.35 0.65 +0.2 -0.1 2.5 1.4 sTypical Switching Ch [ ... ]

C4512 PDF Datasheet Download