Resistor symbol
Also called Fixed resistor
A resistor limits current and divides voltage. Its resistance, in ohms, is fixed.
ANSI / IEEE
IEC 60617 · S00555
What the resistor symbol means
A resistor limits current and divides voltage. Its resistance, in ohms, is fixed.
ANSI and IEC symbols
Where you see it
Everywhere in electronics: current limiting, pull-up and pull-down, voltage dividers, biasing, shunts and load resistors.
What is written next to it
On a schematic, the resistor usually carries its designator and value, such as R1 4.7 kΩ, and sometimes the power rating and tolerance.
Related symbols
Frequently asked questions
What does the resistor symbol look like?
On ANSI drawings: A zigzag line. In IEC 60617: A plain rectangle.
Is the resistor symbol the same in IEC and ANSI?
No. A plain rectangle. The IEC 60617 number is S00555.
Where is a resistor used?
Everywhere in electronics: current limiting, pull-up and pull-down, voltage dividers, biasing, shunts and load resistors.
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