Understand the difference.

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

TOFF

IEEE / ANSI

ANSI/IEEE off-delay timer relay symbol

The off-delay timer form identifies timing after a documented initiating condition is removed. The selected device's supply requirements and timing sequence determine whether the delay can complete during control-power interruption.

Drawing use

Schematic

Application

Control circuits

Reference family

IEEE / ANSI / Manufacturer

Form evidence

Autodesk IEEE-oriented Time Delay Relays 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

Off-delay timing is not an automatic statement of how every contact behaves after complete loss of power.

Full referenceAdd to legend

TOFF

Symbols

Off-delay timer relay

An off-delay timer holds a specified output condition for a documented period after its initiating condition is removed. Its auxiliary power requirements depend on the selected timer.

Drawing use

Schematic

Application

Control circuits

Reference family

IEC / Manufacturer

A distinction that matters

Off-delay is not the same as a minimum pulse duration generated when the trigger first arrives.

Full referenceAdd to legend

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