EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: FrankvHoof on May 20, 2018, 10:32:05 am
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I'm trying to replace this cap that was inside of an axel grinder and broke open circuit. It's an axial capacitor for AC, but it has 2 inputs & 2 outputs.
I've been looking around sites like digikey, but I can't seem to find another capacitor like it.
Does anyone know where I can get a replacement for this? Or would I be better off replacing it with 2 capacitors?
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How was it connected?
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It was hooked up straight to the plug (coming from the wall-AC).
Leaving it out means the grinder works (so I'm guessing it's used for filtering, and not having it might shorten the lifespan of the motor?)
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Here are some more pictures of the grinder for reference.
It was hooked up at the back of the grinder, at the AC input, held by a little metal retention clamp
(Yes, I know my camera sucks. It's an old Galaxy S2, new phone's in the mail.)
(Yes I know I need to hook up ground before using it.)
I've been finding it really hard to come across a dual-pole axial cap like this, does anybody have any ideas?
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That's your typical EMC filter capacitor as they were made in former times. These wires are just "through" connections, there are no modern equivalents.
You can leave it out (won't harm the grinder, but maybe disturb radio reception), or replace it with a modern X rated capacitor of same value. Connect it in parallel with the wires.
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So something like this?
https://www.ebay.com/itm/Polyester-Safety-Capacitor-MKP-250V-275V-280V-0-1-0-33-0-47-1-2-2-22-47-nF-uF/252689533747?hash=item3ad5784b33:m:mshilaYABb0NfAQ34tBHWCA (https://www.ebay.com/itm/Polyester-Safety-Capacitor-MKP-250V-275V-280V-0-1-0-33-0-47-1-2-2-22-47-nF-uF/252689533747?hash=item3ad5784b33:m:mshilaYABb0NfAQ34tBHWCA)
With 330nF being the closest value to 250nF I could easily find.
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Yes, 220nF would also do the job. The exact value doesn't matter too much here.