My original 4 wire capacitor cooked itself at the blue wire site. The three values it has are red: 4uf,white: 4.5uf, and yellow:5uf. I can't find an exact replacement but the closest is one with 4.5, 5 and 5uf. Will this work in its place?

Also, should I replace the switch as well as I don't know what caused the capacitor unit to overheat. The fan was not running at the time.

The items are pictured below.

4.5-5-5 should work fine, the fan will run a hair slower. I would leave the original switch.