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In Reply to: 1N5408 (1000V )rectifier in Bridge good for 350V AC input? posted by hc122 on August 10, 2003 at 21:36:03:
Since the input is 350 volts rms ac, I presume, the peak rectified voltage is +500 volts. During the negative half of the waveform, the reverse biased diodes see -500 volts peak at one end, and +500 volts at the other. The total across each diode is 1000 volts peak. A 1000 volt rated rectifier just makes it. If there is a tolerance on the 350 volts rms, the peak stress on the rectifiers will exceed 1000 volts. I would recommend at least a 1500 volt rated part. If you double the 1000 volt parts, you may want to add resistors across each rectifier in order to equalize the voltages.
Claude
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Follow Ups
- 1000V barely makes it - use 1500V or double up - Claude Abraham 12:42:30 08/11/03 (0)
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