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.

Core Loss Watts (W)

Required number input.

Thermal Resistance Kelvin Per Watt (K/W)

Required number input.

Estimate inductor core temperature rise from measured core loss and a specified core-to-ambient thermal resistance; does not include winding hot spots. 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]

Temperature Rise Kelvin (K)

The resulting temperature rise kelvin returned as a number.

• Inductor calculations depend on core material, air gap, turns, frequency, waveform, temperature, DC bias, copper resistance, skin and proximity effects, fringing, and saturation definition. Small-signal inductance and nominal current rating may not describe switching operation.
• 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.

• Power Dissipation from Temperature Rise

  Infer steady-state power dissipation as (Tj−Ta)/θJA from a measured junction and ambient temperature. Use the effective thermal resistance for the same assembly and cooling conditions.

• Transformer Temperature Rise Estimate

  Estimate steady transformer temperature rise as total heat dissipation multiplied by measured effective thermal resistance to ambient. Airflow, enclosure, mounting, and temperature-dependent losses can change the actual rise.

• Copper Loss

  Compute resistive winding or conductor loss as I²R from RMS current and resistance at the relevant operating temperature. Output is watts; AC skin and proximity effects are not included unless already reflected in the supplied resistance.