This part is a kind of semiconductor called C1518.
Function of this product has 2SC1518.
Manufacturers : Panasonic Semiconductor
Image and pinout :

Some of the text within the PDF file :
Transistor 2SC1518 Silicon NPN epitaxial planer type For high-frequency bias oscillation of tape recorders For DC-DC converter 5.9± 0.2 Unit: mm 4.9± 0.2 q q 2.54± 0.15 (Ta=25˚C) Ratings 25 20 5 1.5 1 1 150 –55 ~ +150 Unit V V V A A W ˚C ˚C 0.45–0.1 1.27 +0.2 Parameter Collector to base voltage Collector to emitter voltage Emitter to base voltage Peak collector current Collector current Collector power dissipation Junction temperature Storage temperature Symbol VCBO VCEO VEBO ICP IC PC Tj Tstg 13.5± 0.5 s Absolute Maximum Ratings 0.7–0.2 +0.3 Low collector to emitter saturation voltage VCE(sat). Satisfactory operation performances and high efficiency with a low-voltage power supply. 0.7± 0.1 8.6± 0.2 s Features 0.45–0.1 1.27 +0.2 s Electrical Characterist [ ... ]
C1518 PDF Datasheet Download
