{"schemaVersion":1,"slug":"gate-turn-off-thyristor","name":"Gate-turn-off thyristor","kind":"symbol","abbreviation":"GTO","aliases":["HDI1_S00655","VDI1_S00655","gate turn off thyristor"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A gate-turn-off thyristor has a documented gate-controlled turn-off capability.","description":["A gate-turn-off thyristor has a documented gate-controlled turn-off capability. Its drive requirements and power-terminal connections are part of the selected converter design."],"readingNotes":["Do not substitute a simple SCR gate circuit for the documented turn-off drive.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify power terminals","Reference gate-drive circuit","State selected device rating"],"distinction":"Gate-turn-off capability distinguishes this device from a conventional latching SCR.","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_S00655, VDI1_S00655 (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-gate-turn-off-thyristor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/gate-turn-off-thyristor","illustration":{"url":"https://eloragrid.ai/library/illustrations/gate-turn-off-thyristor.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."}]}