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

HVR1R8

IEC

Carbon-disc variable resistor

This representation identifies the publisher's carbon-disc variable-resistance form. The publisher identifies a variable resistive form using carbon discs as part of its operating construction. That identifies a component principle without assigning a resistance law or power rating.

Drawing use: Schematic
Application: Electronic components
Reference family: IEC / Manufacturer
Form evidence: Carbon-disc variable resistor. Autodesk IEC-60617 Symbol Preview — Resistive component forms; vendor family reference, not certified IEC geometry or database identifier.

A distinction that matters

The material/mechanism indication is distinct from a generic electronic potentiometer.

Full reference

Symbols

Resistor

A resistor representation identifies a resistive component in a circuit. Different drawing conventions can use different basic outlines, while additional qualifiers distinguish variable resistors, shunts or heating elements. The value, rating and purpose are separate annotations.

Drawing use: Schematic
Application: Control circuits
Reference family: IEC / IEEE / ANSI

A distinction that matters

IEC-style rectangular and other conventional resistor depictions can describe the same component concept, but qualifiers and documentation still matter.

Full reference

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