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Old 5th September 2006, 04:05 AM   #1
jarthel is offline jarthel  Australia
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Default resistors before the diode in a bridged rectifier: what does it do?

I've come across lots of designs (mainly for SS) where the designer have placed resistors before the diodes?

something like:

What is the purpose of the resistors?

Thank you for the help.
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Old 5th September 2006, 04:41 AM   #2
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What you have drawn is "in series" with the diodes, which reduces inrush current and the crest factor of the supply current.
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Old 5th September 2006, 04:38 PM   #3
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See also this thread:
Bryston - AM Audio PSU design question
Free Schematic and Service Manual downloads, Spare time company (just for fun):
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