"Unless your 1.0 uF 630v is of the older flat variety - there is no difference except leadout and capacity."
OK, so the way I interpret this statement is that the older, larger diameter flat 630V CAST caps are of the same WPIO construction as the 100V Cast caps, just with a thicker dielectric layer. The newer, smaller diameter 630V CAST caps have the extra layer of "mystery material" between the paper layers to increase the dielectric strength and decrease the size.
I know a few of us had questions when the shape and size of the caps changed a while back, and we were assured that these were still genuine CAST caps...it seems they may genuine yet still different, though.
OK, so the way I interpret this statement is that the older, larger diameter flat 630V CAST caps are of the same WPIO construction as the 100V Cast caps, just with a thicker dielectric layer. The newer, smaller diameter 630V CAST caps have the extra layer of "mystery material" between the paper layers to increase the dielectric strength and decrease the size.
I know a few of us had questions when the shape and size of the caps changed a while back, and we were assured that these were still genuine CAST caps...it seems they may genuine yet still different, though.