This part is a kind of semiconductor called BCY79.

Function of this product has PNP SILICON PLANAR TRANSISTORS.

Manufacturers : CDIL

Image and pinout :

Some of the text within the PDF file :

Continental Device India Limited An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company PNP SILICON PLANAR TRANSISTORS BCY77, BCY78 BCY79 TO-18 Metal Can Package Low Noise Audio Amplifier input stages and Driver Applications Complementary BCY57/58/59 ABSOLUTE MAXIMUM RATINGS DESCRIPTION Collector Emitter Voltage Collector Emitter Voltage Emitter Base Voltage Collector Current Continuous Base Current Power Dissipation @ Ta=25ºC Power Dissipation @ Tc=45ºC Operating and Storage Junction Temperature Range SYMBOL VCEO VCES VEBO IC IB PD PD Tj, Tstg BCY77 60 60 5 100 50 BCY78 32 32 5 200 50 0.39 1.00 - 65 to +200 BCY79 45 45 5 200 50 UNIT V V V mA mA W W ºC THERMAL CHARACTERISTICS Junction to Ambient in free air Junction to Case Rth(j-a) Rth(j-c) 450 K/W 150 K/W ELECTRICAL C [ ... ]

BCY79 PDF Datasheet Download