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.

Forward Amperes (A)

Required number input.

Saturation Amperes (A)

Required number input.

Ideality Factor

Required number input.

Temperature Kelvin (K)

Required number input.

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

Forward Volts (V)

The resulting forward volts returned as a number.

• LED forward voltage, current, power, efficacy, intensity, wavelength, and viewing angle depend on junction temperature, binning, drive waveform, optics, aging, and the manufacturer's measurement convention. Thermal design and absolute maximum ratings remain separate.
• 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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