DIAC 37 Volt DO 35 (DB3):

The DIAC 37 Volt DO 35 (DB3) is a type of semiconductor device known as a DIAC, used primarily in triggering applications, such as in light dimmers, motor speed controls, and other electronic circuits. It is designed to switch on and off at a specific voltage threshold, enabling smooth control of AC signals. The DB3 is particularly used in phase-control applications and provides a reliable and stable performance in triggering TRIACs.