Bridge Rectifier Dissipation

[boatanchorguy]

With a basic 4 diode bridge rectifier where there is no load - just open circuit on the output side - am I correct that the only energy expended in this system would be heat due to the voltage drops across the diodes? 

[rx8pilot]

An open circuit has no current. Without current, there is no heat.

Short and misplld from my mobile......

[TimNJ]

Not sure the context of your question but yes, without any current, there cannot be dissipation.

On a side note, if you try to probe a bridge rectifier open circuit (or effectively open circuit with a 10M scope probe), you may see some weird nonlinear waveforms. Apply a little load to it and you’ll see what you’d expect.

[madires]

There would be a negligible small power loss because the diodes have a tiny leakage current.