# ANSI/IEEE Solid-state relay form Canonical URL: https://eloragrid.ai/symbols/ansi-solid-state-relay Publisher: Elora Grid Updated: 2026-10-28 Lookup label: SSR Drawing use: Schematic Reference families: IEEE / ANSI, Manufacturer ## Symbol convention Convention: IEEE / ANSI Form: Solid State 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. Related representation: [Solid-state relay](https://eloragrid.ai/symbols/solid-state-relay) IEEE-library form of solid-state relay: a solid-state relay switches an output through semiconductor circuitry in response to a control input. ## In plain English ### What does ANSI/IEEE Solid-state relay form mean? 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. ### A simple 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. ### What the drawings help you do 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. ### This particular reference 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. ### Terms - Normally open / normally closed: The contact state in the normal condition defined for the drawing. - Coil: A wound conductor that can produce a magnetic field when energised. - Terminal: An identified point where a conductor connects. Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram. - [Autodesk IEEE Symbol Preview — Relays and Contacts](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F8EAC387-53CF-45FE-BE6A-C0C8FB3C1B22.htm) ## What it represents 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. ## How to read it - 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. ## Information to show or reference - Name output AC or DC type - State input operating range - Reference leakage and load limits ## Important distinction An SSR has no ordinary mechanical contact gap and must not be treated as a disconnector. ## Facts - Convention evidence: Autodesk IEEE Symbol Preview: Relays and Contacts; published form: Solid State. - Public vendor block: HCR1SSD. Vendor library token, not an IEEE symbol number. - Drawing role: Relay operation - Identifier status: 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. - Artwork scope: Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified. ## Public references - [Autodesk IEEE Symbol Preview — Relays and Contacts](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F8EAC387-53CF-45FE-BE6A-C0C8FB3C1B22.htm) — Autodesk. 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. ## Graphic scope Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.