R
Resistor
A resistive component with its value and purpose documented separately.
Schematic
Symbols · R VAR
Variable resistor
A variable resistor provides a documented adjustable resistance in a circuit path.
SLD / Schematic · R VAR
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
A distinction that matters
A variable resistor is a broader function than a three-terminal potentiometer connection.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Resistors and heater-element symbols
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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