{"schemaVersion":1,"slug":"triac","name":"TRIAC","kind":"symbol","abbreviation":"TRIAC","aliases":["HDI1_S00659","VDI1_S00659"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A TRIAC is a bidirectional thyristor used for a documented AC switching or control function.","description":["A TRIAC is a bidirectional thyristor used for a documented AC switching or control function. Its main terminals and gate connections must match the selected component."],"readingNotes":["Identify the gate reference main terminal from the component data.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label main terminals and gate","Reference gate trigger circuit","State AC load conditions"],"distinction":"A TRIAC is a controlled bidirectional device, unlike a DIAC trigger element.","facts":[{"label":"Drawing role","value":"Semiconductor function"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDI1_S00659, VDI1_S00659 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","power-converter"],"artwork":"edu-triac","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/triac","illustration":{"url":"https://eloragrid.ai/library/illustrations/triac.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-symbol-semiconductors","title":"AutoCAD Electrical: Semiconductor components","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-AC954072-7314-4682-88AF-38160D61E9A2.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}]}