50v capacitor in a 40v circuit

capacitor

I am Making a Power Supply, There is a 40v rail that needs a 10000uf cap, I was wondering if it is safe to use a 50v rated cap, Should i be worried that it is close to the Limit? The Brand of the capacitor is Elna.

Best Answer

Under full load you're close to 40V peak- you need to allow for high mains voltage and transformer regulation (voltage will rise under light load).

50V should just be okay if transformer regulation is good (usually is for larger transformers). Elna is a good brand.