Understand the difference.

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

NC HOLD

IEEE / ANSI

ANSI/IEEE maintained normally-closed contact symbol

The maintained NC contact form adds a retention characteristic to the reference closed contact. Analysing a control sequence requires both the initial continuity and the stated retained operating condition.

Drawing use

Schematic

Application

Control circuits

Reference family

IEEE / ANSI / Manufacturer

Form evidence

Autodesk IEEE-oriented Relays and Contacts functional form. Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.

A distinction that matters

A maintained NC contact is not an off-delay contact unless timing is separately specified.

Full referenceAdd to legend

NC HOLD

Symbols

Maintained normally-closed contact

A maintained NC contact retains its actuated position until the documented return action occurs. The unactuated closed state and retained operated state must both be understood.

Drawing use

Schematic

Application

Control circuits

Reference family

IEC / Manufacturer

A distinction that matters

A maintained contact is not necessarily an electrically latching relay.

Full referenceAdd to legend

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