This part is a kind of semiconductor called C3858.

Function of this product has 2SC3858.

Manufacturers : Sanken electric

Image and pinout :

Some of the text within the PDF file :

2SC3858 Silicon NPN Triple Diffused Planar Transistor (Complement to type 2SA1494) sAbsolute maximum ratings (Ta=25°C) Symbol VCBO VCEO VEBO IC IB PC Tj Tstg 2SC3858 200 200 6 17 5 200(Tc=25°C) 150 –55 to +150 Unit V V V A A W °C °C Application : Audio and General Purpose (Ta=25°C) sElectrical Characteristics Symbol ICBO IEBO V(BR)CEO hFE VCE(sat) fT COB Conditions VCB=200V VEB=6V IC=50mA VCE=4V, IC=8A IC=10A, IB=1A VCE=12V, IE=–1A VCB=10V, f=1MHz 100max 100max 200min External Dimensions MT-200 36.4±0.3 24.4±0.2 2-ø3.2±0.1 9 7 21.4±0.3 2.1 6.0±0.2 2SC3858 Unit µA µA V a b 50min∗ 2.5max 20typ 300typ V MHz pF 20.0min 4.0max 2 3 1.05 +0.2 -0.1 5.45±0.1 B C E 5.45±0.1 0.65 +0.2 -0.1 3.0 +0.3 -0.1 ∗hFE Rank Y(50 to 100), P(70 to 140), G(90 to 180) sTypical Swi [ ... ]

C3858 PDF Datasheet Download