TRIACs, which handle the heavy lifting of AC power, are notoriously "finicky." They don't always trigger symmetrically on both halves of an AC cycle, leading to flickering lights or uneven motor speeds.
You can find the full PDF documentation at these major repositories: diac db2 datasheet pdf 14 top
Looking for the official specs on the ? If you are designing triggering circuits for TRIACs or working on AC phase control, this component is a staple. Here is the lowdown on the "Top 14" search query and where to find the PDF. TRIACs, which handle the heavy lifting of AC