The capacitor is a 2.2uf 50v cap. It is capacitor 10 on the board. I have purchased a new board from Lionel and I assume that the "exploded one" is a polar cap and the same as the 3 caps beside it . I am assuming it is a polar cap because of the cost difference between a polar vs non-polar capacitors although I am not sure. I suppose I can use a non-polar cap instead.
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