# Variable resistor

Canonical URL: https://eloragrid.ai/symbols/variable-resistor
Publisher: Elora Grid
Updated: 2026-10-13
Lookup label: R VAR
Drawing use: SLD, Schematic
Reference families: IEC, Manufacturer

A variable resistor provides a documented adjustable resistance in a circuit path.

## What it represents

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.

## How to read it

- Check whether the device is used as a two-terminal resistance or a three-terminal divider.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.

## Information to show or reference

- State resistance range
- Show connected terminals
- Reference adjustment method

## Important distinction

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

## Facts

- Drawing role: Passive circuit element
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- Public vendor block reference: HVR1B, VVR1B (Autodesk identifiers; not IEC symbol numbers)
- Identifier status: The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name.

## Public references

- [Resistors and heater-element symbols](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-1D071951-D38E-4B15-8B9E-C30ECBD55C19.htm) — Autodesk. Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.