D83TG Diac 34V, 2A, 2-Pin DO-35:

The D83TG is a DIAC (DIode for Alternating Current) designed for use in triggering and switching applications within electronic circuits. It is commonly used for phase control in AC signals, often in light dimmers, motor speed control, and other control applications. The device has a breakdown voltage of 34V and is housed in a compact DO-35 package.