Bridge Rectifier Calculator

Your details

The RMS (root mean square) voltage from the transformer secondary winding. Mains-connected transformers are rated this way.
V
Supply frequency. Affects the ripple voltage calculation. 60 Hz is standard in North America.
The DC load connected across the output. Lower values draw more current and increase ripple.
Ω
Electrolytic capacitor across the output. Enter 0 to see the unfiltered ripple. Larger values reduce ripple.
μF
Forward voltage drop across one diode. Two diodes conduct at any moment, so the total loss is 2 x Vf.
DC Output VoltageModerate ripple
14.95V

Average (mean) DC voltage at the output terminals after rectification and filtering

Peak Voltage16.97V
DC Load Current0.149A
Ripple Voltage1.246V
Ripple Factor0.08%
Peak Inverse Voltage (PIV)16.97V
Recommended PIV Rating25.5V
Output Power2.23W
Diode Power Loss0.209W
Rectifier Efficiency0.9%
Capacitor for 1% Ripple8,333μF
Transformer VA Rating4.4VA
DC Output (V)14.95
Ripple (V)1.246
PIV (V)16.97

DC output: 14.95 V at 149.5 mA

  • The rectifier delivers 14.95 V DC with 1.246 V of peak-to-peak ripple (8.33%).
  • Rectifier efficiency is 91.4% - the rest is lost as heat in the four diodes.
  • Your filter capacitor (1000 uF) is well below the 8333 uF needed for 1% ripple - consider increasing it.
  • Each diode must block up to 17.0 V in reverse - choose diodes with a PRV rating of at least 25 V (1.5x derating).

Next stepVerify your transformer VA rating, add heatsinks to the diodes if load current exceeds 1 A, and use a voltage regulator (e.g. 7812) downstream for stable regulated output.

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