This part is a kind of semiconductor called 1008254-501.

Function of this product has Operating and Service Manual.

Manufacturers : ar worldwide

Image and pinout :

Some of the text within the PDF file :

Operating and Service Manual 20T4G18 Model 1008254-501 Part Number Serial Number http:// Model 20T4G18 2 http:// EC Declaration of Conformity We; Amplifier Research 160 School House Road Souderton, PA 18964 declare that our product; the Model 200T4G18 amplifier to which this declaration relates is in compliance with the requirements of the EEC EMC Directive (89/336/EEC) and Low Voltage Directive (73/23/EEC) in accordance with the relative standards listed below: EMC: EN 50082-1: 1992 Electromagnetic compatibility – Generic immunity standard EN 50081-1: 1992 Electromagnetic emissions requirements for Industrial, Scientific, and Medical (ISM) Equipment Safety: EN 60950 (1995) The CE marking is affixed on the device according to the EC Directives [ ... ]

1008254-501 PDF Datasheet Download