{"schemaVersion":1,"slug":"manually-unlatched-nc-contact","name":"Manually unlatched NC contact","kind":"symbol","abbreviation":"NC UNLATCH","aliases":["HCR2221F","VCR2221F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A manually unlatched NC contact has a mechanical retained state and a documented manual release.","description":["A manually unlatched NC contact has a mechanical retained state and a documented manual release. Its reference state is closed but the retained operated position must be stated."],"readingNotes":["Confirm which contact position the mechanism retains.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State reference and retained states","Identify manual release","Link associated device"],"distinction":"A mechanical retention marker must not be confused with a delayed-return timer marker.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR2221F, VCR2221F (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":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-manually-unlatched-nc-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/manually-unlatched-nc-contact","illustration":{"url":"https://eloragrid.ai/library/illustrations/manually-unlatched-nc-contact.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"autodesk-contacts","title":"Relays and contacts: public symbol reference","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-011C62B8-9EC8-485C-B47D-B22A3F7B7574.htm","type":"cad-reference","scope":"Normally open, normally closed and changeover contacts, relay coils and latching relay variants.","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."}]}