This part is a kind of semiconductor called MCT2.

Function of this product has 6-Pin DIP Optoisolators Transistor Output.

Manufacturers : Motorola

Image and pinout :

Some of the text within the PDF file :

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MCT2/D GlobalOptoisolator™ 6-Pin DIP Optoisolators Transistor Output The MCT and MCT2E devices consist of a gallium arsenide infrared emitting diode optically coupled to a monolithic silicon phototransistor detector. Applications • General Purpose Switching Circuits • Interfacing and coupling systems of different potentials and impedances • I/O Interfacing • Solid State Relays • Monitor and Detection Circuits • To order devices that are tested and marked per VDE 0884 requirements, the suffix ”V” must be included at end of part number. VDE 0884 is a test option. MAXIMUM RATINGS (TA = 25°C unless otherwise noted) Rating INPUT LED Reverse Voltage Forward Current Continuous LED Power Dissipation @ TA = 25° [ ... ]

MCT2 PDF Datasheet Download