This part is a kind of semiconductor called UAA145.

Function of this product has Phase Control Circuit for Industrial Applications.

Manufacturers : TEMIC

Image and pinout :

Some of the text within the PDF file :

UAA145 Phase Control Circuit for Industrial Applications Description The UAA145 is a bipolar integrated circuit, designed to provide phase control for industrial applications. It permits the number of components in thyristor drive circuits to be drastically reduced. The versatility of the device is further enhanced by the provision of a large number of pins giving access to internal circuit points. Features D Separate pulse output synchronized by mains half wave Applications D Output pulse-width is freely adjustable D Phase angle variable from >0° to <180° D High-impedance phase shift input D Less than 3° pulse symmetry between two half-cycles or phase of different integrated circuits D Industrial power control D Silicon controlled rectifier Package: DIP16 (special case) Block Dia [ ... ]

UAA145 PDF Datasheet Download