This part is a kind of semiconductor called 2N6099.

Function of this product has COMPLEMENTARY SILICON TRANSISTORS.

Manufacturers : UTC

Image and pinout :

Some of the text within the PDF file :

UTC 2N3773/2N6099 COMPLEMENTARY SILICON TRANSISTORS The 2N3773/2N6099 are power-base power transistors designed for high power audio, disk head positions and other linear applications. These device can be used in power switching circuits such as relay or solened drivers, DC to DC converters or inverts. P O W E R TRANSISTOR FEATURES *High safe operating area(100 tested) 150W and 100V *Complement Characterized for linear operation *High DC Current Gain and low saturation voltage Hfe=15(8A 4V) Vce(sat)=1.4V(Ic=8A,Ib=0.8A) *For Low Distortion Complementary Designs TO-3 ABSOLUTE MAXIMUM RATINGS (Ta=25°C, unless otherwise specified ) PARAMETERS Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector-emitter voltage Total Power dissipation Tc=25°C Dertate above 25°C [ ... ]

2N6099 PDF Datasheet Download