Side-by-side reference

Understand the difference.

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

First referenceCompare with

R VAR

IEEE / ANSI

ANSI/IEEE variable resistor symbol

The variable-resistor form combines a resistive path with an adjustment indication. The adjustable range and connected terminals determine whether the circuit uses it as a resistance or part of a divider; the arrow is not automatically a separate supply lead.

Drawing use: SLD / Schematic
Application: Electronic components
Reference family: IEEE / ANSI / Manufacturer
Form evidence: Autodesk IEEE-oriented Resistive Components 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 variable resistor's adjustment and a directional signal arrow carry different meanings.

Full reference

R VAR

Symbols

Variable resistor

A variable resistor provides a documented adjustable resistance in a circuit path. Its range, terminal usage and adjustment method must be stated when they affect the control function.

Drawing use: SLD / Schematic
Application: Control circuits
Reference family: IEC / Manufacturer

A distinction that matters

A variable resistor is a broader function than a three-terminal potentiometer connection.

Full reference

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