{"schemaVersion":1,"slug":"ansi-solid-state-relay","name":"ANSI/IEEE Solid-state relay form","kind":"symbol","abbreviation":"SSR","aliases":["HCR1SSD","VCR1SSD","IEEE Solid State","ANSI Solid-state relay"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-library form of solid-state relay: a solid-state relay switches an output through semiconductor circuitry in response to a control input.","description":["This reference locates solid-state relay in Autodesk's IEEE-oriented relays and contacts family. A solid-state relay switches an output through semiconductor circuitry in response to a control input. Control isolation, output type and leakage depend on the chosen product. The public library uses HCR1SSD for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.","Trace the measured quantity or initiating control signal separately from the output contacts. The device tag links the sensing or operating element to the controlled circuit; settings, reset behaviour and the actual terminal arrangement belong in the selected equipment documentation.","Distinguish the low-power input terminals from the load-side output terminals. An SSR has no ordinary mechanical contact gap and must not be treated as a disconnector. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted."],"readingNotes":["Distinguish the low-power input terminals from the load-side output terminals.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name output AC or DC type","State input operating range","Reference leakage and load limits"],"distinction":"An SSR has no ordinary mechanical contact gap and must not be treated as a disconnector.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview: Relays and Contacts; published form: Solid State."},{"label":"Public vendor block","value":"HCR1SSD. Vendor library token, not an IEEE symbol number."},{"label":"Drawing role","value":"Relay operation"},{"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."},{"label":"Artwork scope","value":"Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified."}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Public IEEE-oriented Relays and Contacts table explicitly lists HCR1SSD as Solid State. This supports the vendor convention context, not reproduction of the publisher graphic."}],"related":["solid-state-relay","relay-coil","normally-open-contact"],"artwork":"s28-ansi-solid-state-relay","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Solid State","reference":"Autodesk IEEE Symbol Preview: Relays and Contacts, block HCR1SSD. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.","counterpart":"solid-state-relay"},"plainEnglish":{"title":"What does ANSI/IEEE Solid-state relay form mean?","introduction":"This reference locates solid-state relay in Autodesk's IEEE-oriented relays and contacts family. A solid-state relay switches an output through semiconductor circuitry in response to a control input. Control isolation, output type and leakage depend on the chosen product. The public library uses HCR1SSD for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.","example":"Trace the measured quantity or initiating control signal separately from the output contacts. The device tag links the sensing or operating element to the controlled circuit; settings, reset behaviour and the actual terminal arrangement belong in the selected equipment documentation.","drawings":"Distinguish the low-power input terminals from the load-side output terminals. An SSR has no ordinary mechanical contact gap and must not be treated as a disconnector. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.","terms":[{"name":"Normally open / normally closed","meaning":"The contact state in the normal condition defined for the drawing."},{"name":"Coil","meaning":"A wound conductor that can produce a magnetic field when energised."},{"name":"Terminal","meaning":"An identified point where a conductor connects."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"Autodesk IEEE Symbol Preview — Relays and Contacts","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F8EAC387-53CF-45FE-BE6A-C0C8FB3C1B22.htm"}],"detail":"IEEE-library form of solid-state relay: a solid-state relay switches an output through semiconductor circuitry in response to a control input. An SSR has no ordinary mechanical contact gap and must not be treated as a disconnector.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/ansi-solid-state-relay","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/ansi-solid-state-relay.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","title":"Autodesk IEEE Symbol Preview — Relays and Contacts","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F8EAC387-53CF-45FE-BE6A-C0C8FB3C1B22.htm","type":"cad-reference","scope":"Verified public IEEE-oriented vendor catalogue. Block names identify vendor symbols, not IEEE standard symbol numbers. Linked only; graphics and CAD files are not redistributed. IEEE/ANSI 315-1975 is a historical graphics reference with Inactive-Reserved status; this page does not certify current standards compliance.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Public IEEE-oriented Relays and Contacts table explicitly lists HCR1SSD as Solid State. This supports the vendor convention context, not reproduction of the publisher graphic."}]}