Both of my capacitors went out at the same time so I had to keep one of me AC units on continuously until I received my replacement parts. The Domestic 55/15 were the exact match, I only wish I would have ordered an extra one because they have been on back order ever since
I bought replacement capacitors for my roof top dometic air conditioner as spares so can only say they are exact replacements for the ones that are there now. I can say that the sales person who I spoke to was very helpful in making sure I got the right parts and that they arrived in a timely manner. It's nice to deal with a company that is service orientated.