Resistive electrical-load calculator
Calculate voltage, current, resistance, PWM heating, RMS current, energy, and a continuous power-rating target.
Your result
ON YOUR DEVICEEnter your inputs and calculate to see the result.
Calculate the on-state and the heating.
The model is a purely resistive load driven between zero and the stated on-state voltage. Average power scales with duty; RMS current scales with its square root. The continuous rating target uses your selected utilization. Pulse overload capability, cooling, and temperature derating must be taken from the chosen resistor’s datasheet.
I_on = V_on / R
P_average = V_on² / R × duty
I_RMS = I_on × √duty
Energy = P_average × duration