Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

SSR

IEEE / ANSI

ANSI/IEEE Solid-state relay form

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.

Drawing use

Schematic

Application

Control circuits

Reference family

IEEE / ANSI / Manufacturer

Form evidence

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.

A distinction that matters

An SSR has no ordinary mechanical contact gap and must not be treated as a disconnector.

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SSR

Symbols

Solid-state relay

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.

Drawing use

Schematic

Application

Control circuits

Reference family

IEC / Manufacturer

A distinction that matters

An SSR has no ordinary mechanical contact gap and must not be treated as a disconnector.

Full referenceAdd to legend

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.