A DIAC (Diode for Alternating Current) is a two-terminal, bi‑directional semiconductor switch that blocks current until its is reached, at which point it abruptly turns on into a low‑voltage conducting state. Unlike a standard diode, it conducts in both directions, making it ideal for triggering triacs in AC circuits. Most common DIACs have a symmetrical breakover voltage in the 28 V–36 V range, though asymmetric variants (e.g., 7 V–18 V) also exist.
Switches on in both positive and negative directions. diac db2 datasheet pdf 14 top
Based on industry-standard datasheets for the DB-series family (DB3, DB4, DB6) and generic DIAC data, the following 14 points represent the most critical parameters for a DB2. A DIAC (Diode for Alternating Current) is a
This is the "ghost story" of the component. Once the DIAC breaks over at 32 volts, its internal resistance collapses. It actually lowers its voltage requirement to stay on. It enters a valley where it conducts easier than before. It is a one-way door; once you push the DIAC through that 32-volt wall, it tumbles down the other side, conducting freely until the current drops to almost nothing. Switches on in both positive and negative directions
The "DB2" is often ranked as a top component for through-hole designs because: