Hi, I am trying to find some ware I can buy this capacitor in the pics attached. I normally get parts from RS online but cant seem to to find this one listed.
The capacitor is a metallized paper cap Rifa PME285 series, 2.2nF or 2,200pF X2 safety rated 275VAC.
Don't replace with Rifa PME271's they are notorious for cracking and shorting out, they burn up.
The industry is instead using ceramic disc capacitors (Y2) there.
Morning All, andrewsawesomr thank you for the link. That cap is unfortunately out of stock until mid September. I have checked and there is another that matches all categories except the series instead of VY2 its AY2. I wonder if this would be a acceptable equivalent. The use for this is a Power supply in a VHS player. Please see the link below.
So would it need to be a X2/Y2? I know the original part in my pic is X2 for domestic use in the uk and X1 is industrial. not sure why its not interchangeable.
Because a Y-cap failure can cause electric shock, they are tested to higher voltages that are 2X that of an X-cap in the same class number.
A Y2 is tested to 5kV, an X2 to 2.5kV. So you need an X2 cap but a Y2 will work fine despite its higher voltage and larger size.
X1 is a higher voltage-proof test than X2, so an X1 is above an X2.
Y1 is a higher voltage-proof test than Y2, so an Y1 is above an Y2.
OP your cap is likely just for RFI/EMI filtering like in a sewing machine or SMPS.
I think it's only dielectric strength that is the difference? Higher test voltages for Y-caps.
Parts of IEC60384-14 the endurance test is 1,000hrs at high temp and voltage 1.25x rated for X2 and X1, and 1.7x for Y2.
There is no flammability test performed on Y-caps. I don't have a copy of the standard.
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