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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 13th Aug 2018, 9:56 pm   #1
valveaudio
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Default Five wire XY suppressor

The 5 wire XY capacitor just blew up in my Unimat lathe It is:
ERO F1740-325-5522 1x0.025ufX 2x 2500pfY 4A
I cannot find anything with this part no. Size is critical since it is fitted in the motor housing.

Any ideas?

Thanks Trevor
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Old 14th Aug 2018, 10:38 am   #2
valveaudio
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Default Re: Looking for 5 wire XY suppressor

Looks like Vishay F1740-322-5511 is the thing, but I can't find one of them either!

Trevor
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Old 14th Aug 2018, 7:10 pm   #3
yesnaby
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Default Re: Looking for 5 wire XY suppressor

https://www.ebay.co.uk/itm/Mains-int...-/362392711714

Nearly the same values, only three leads though.
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Old 14th Aug 2018, 7:35 pm   #4
Boater Sam
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Default Re: Looking for 5 wire XY suppressor

Its for suppression so the actual component could be placed elsewhere.
5 wire will have an x and two y caps and a series choke pair in each lead.
3 wire will likely not have a choke.
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Old 16th Aug 2018, 11:21 am   #5
valveaudio
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Default Re: Looking for 5 wire XY suppressor

Ok, can't find the correct size and the Ebay item is expensive, so I have built an external filter using X & Y capacitors acquired from old PC power supplies, mounted in a small plastic box close to the lathe.

Trevor

Mods this can be closed unless you think it may be useful for others, thanks
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Old 17th Aug 2018, 10:56 pm   #6
Maarten
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Default Re: Five wire XY suppressor

5 wire ones almost always have no additional choke inside, so you should be good with any 3 or 5 wire one (or with separate capacitors of course).

The reason that the exact original type or a direct replacement isn't available is probably that the manufacturer discontinued paper capacitors. I would be VERY weary of using new old stock, as stocking is often worse for their remaining life than regular usage. When replacing, polypropylene dielectric is preferred.
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