Quoted from herg:Actually, I misspoke earlier when I said that. LOTR_breath is more accurate in saying it's DOTS. The important thing, however, is that the diode is not directly on the coil, and if you turn it the wrong way, bad things will happen.
https://pinside.com/pinball/forum/topic/replaced-stern-flipper-coil-blows-fuse-each-time