This part is a kind of semiconductor called BCY87.

Function of this product has NPN general purpose transistors.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

DISCRETE SEMICONDUCTORS DATA SHEET M3D126 BCY87; BCY88; BCY89 NPN general purpose transistors Product specification Supersedes data of September 1994 File under Discrete Semiconductors, SC04 1997 Jun 20 Philips Semiconductors Product specification NPN general purpose transistors FEATURES • Low current (max. 30 mA) • Low voltage (max. 45 V). APPLICATIONS • Differential amplifier applications in general industrial service e.g. instrumentation and control • The BCY87 and BCY88 are intended for use in pre-stages of differential amplifiers where low offset, low drift and low noise are of prime importance • The BCY89 is intended for use in second stages of differential amplifiers, long-tailed pairs and more general applications. DESCRIPTION Matched dual NPN transistors in a TO- [ ... ]

BCY87 PDF Datasheet Download