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Old 28th July 2005, 06:07 PM   #1
pooge is offline pooge  United States
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Default Snubber for HEXFRED?

Has anyone investigated the value of snubbers for a HEXFRED rectifier bridge? Assuming the purpose of going HEXFRED is to reduce rf hash, is snubbing still beneficial, or still a system dependent thing? I can't find any answer through a search.
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Old 28th July 2005, 07:42 PM   #2
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According to IRF, the soft recovery means there is very little need for a RC snubber.

The junction capacitance is something like 1/10th that of an MUR860 -- i.e. about 10pF -- compared to 100pF (@30V).
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Old 29th July 2005, 12:34 AM   #3
pooge is offline pooge  United States
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I am aware of the supposed lack of RF with Hexfreds. I was wondering, though, if anyone had any experience otherwise, or if snubbing improved them even more.
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Old 29th July 2005, 02:41 AM   #4
Leolabs is offline Leolabs  Malaysia
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Many have snubbing normal high speed diode but never seen any snubbing with HEXFRED.
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