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Are bridge rectifiers "downward compatible"? Answered

If I have a power supply circuit that requires a 25.4VAC, 2A transformer connecting to a bridge rectifier, could I use a rectifier that is rated at 50V, 4A, or do I need to get one that matches the input more closely?

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ShutterBuggerBest Answer (author)2009-04-20

Yes. You can use any rectifier rated above the output voltage of your transformer. You can pull components from scrapped electronics and use a site like datasheet4u.com to get the specifications. ~Bob~

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Xombee (author)ShutterBugger2009-04-21

Thank you very much for your replies!

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frollard (author)ShutterBugger2009-04-21

Exactly like that - sometimes their characteristics aren't as good - like a high-current diode might have a higher voltage drop - but if it's rated for 100 volts - thats max before it will let the smoke out - in fact, it's better to use components rated 1.5-2x higher than your normal operating range.

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