This part is a kind of semiconductor called 2N6075.

Function of this product has Sensitive Gate Triacs.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

2N6071A/B Series Preferred Device Sensitive Gate Triacs Silicon Bidirectional Thyristors Designed primarily for full-wave ac control applications, such as light dimmers, motor controls, heating controls and power supplies; or wherever full-wave silicon gate controlled solid-state devices are needed. Triac type thyristors switch from a blocking to a conducting state for either polarity of applied anode voltage with positive or negative gate triggering. • Sensitive Gate Triggering Uniquely Compatible for Direct Coupling to TTL, HTL, CMOS and Operational Amplifier Integrated Circuit Logic Functions • Gate Triggering 4 Mode 2N6071A,B, 2N6073A,B, 2N6075A,B • Blocking Voltages to 600 Volts • All Diffused and Glass Passivated Junctions for Greater Parameter Uniformity and Stability [ ... ]

2N6075 PDF Datasheet Download