Understand the difference.

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

Q021216

IEC

Mechanical clutch connection

A clutch qualifier identifies a selectively coupled mechanical relationship. A clutch provides a selectable mechanical relationship between driving and driven elements. Its engaged and disengaged conditions can influence movement without interrupting an electrical supply.

Drawing use

Schematic

Application

Control circuits

Reference family

IEC / Manufacturer

Form evidence

Mechanical clutch connection. Autodesk IEC-60617 Symbol Preview — Mechanical coupling qualifiers; vendor family reference, not certified IEC geometry or database identifier.

A distinction that matters

Mechanical engagement does not mean electrical continuity between the elements.

Full referenceAdd to legend

Coil

Symbols

Relay coil

A relay coil represents an operating element that changes the state of associated contacts when the device operates. Coil and contact representations are often drawn in different locations to make the circuit easier to read. Their shared identifier and cross-references establish the relationship.

Drawing use

Schematic

Application

Control circuits

Reference family

IEC / IEEE / ANSI

A distinction that matters

A relay coil is not a contactor power pole. Similar operating-element marks can represent equipment with different switching duties.

Full referenceAdd to legend

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