Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Thevenin voltage

Required number input.

Thevenin resistance

Required number input.

Compute the Norton source current in amperes from the Thevenin voltage and Thevenin resistance. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Norton current

The resulting norton current returned as a number.

• A Norton equivalent is valid only at the selected pair of terminals and under the assumed linear operating conditions. Dependent sources, frequency-dependent impedance, nonlinear devices, and changing loads require the appropriate small-signal or full circuit model.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

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