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.

Saturation current (A)

Required number input.

Forward voltage (V)

Required number input.

Thermal voltage (V)

Required number input.

Ideality factor

Optional number input.

Calculate Shockley diode current. 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]

Diode current (A)

The resulting diode current returned as a number.

• Diode voltage, current, dynamic resistance, and loss depend exponentially on temperature and on device-specific model parameters. Reverse recovery, junction capacitance, leakage, surge rating, thermal impedance, and switching waveform may dominate practical behavior.
• 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.

• LED Forward Voltage Vs Current

  Shockley-diode forward voltage estimate from current, saturation current, ideality factor and junction temperature; series resistance omitted.

• Ac Motor Reactive Power

  Calculate positive reactive-power magnitude for a balanced three-phase motor from line voltage, line current, and power factor.

• APD Gain

  Calculate avalanche photodiode current multiplication from multiplied photocurrent and unity-gain primary photocurrent after dark-current subtraction.