Current source symbol
Also called Ideal current source, Constant current source
A source that drives a set current whatever the voltage across it.
ANSI / IEEE
IEC 60617What the current source symbol means
A source that drives a set current whatever the voltage across it.
ANSI and IEC symbols
Where you see it
Circuit analysis, 4 to 20 mA loop calibrators and LED drivers.
Related symbols
Frequently asked questions
What does the current source symbol look like?
On ANSI drawings: A circle with an arrow showing the direction of current. In IEC 60617: A circle with a line across the conductor. In IEC drawings a line along the conductor is a voltage source.
Is the current source symbol the same in IEC and ANSI?
No. A circle with a line across the conductor. In IEC drawings a line along the conductor is a voltage source.
Where is a current source used?
Circuit analysis, 4 to 20 mA loop calibrators and LED drivers.
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