Capacitive Transformerless Power Supply Calculator
Free calculate component values for capacitive transformerless power supplies including capacitor size, current limiting, and voltage regulation.
Input Parameters
RMS voltage
Expected voltage across load
Results
Enter parameters to calculate component values
Capacitive Power Supply Formulas
Capacitor Reactance
XC = 1 / (2π × f × C)
Current limiting capacitor
Required Capacitance
C = I / (2π × f × V)
Where I is current, f is frequency, V is voltage