Agreed, the class cylinder is an axial lead fuse.
I was thinking the yellow disc may be a Bourns MF-R185 PTC resettable fuse. It does appear to have the Bourns logo on it, and appears as if it may have the distinctive inward U bends on the leads. Bourns MOVs I've found come in a blue package, but otherwise look similar to a PTC without the U bends in the leads.
I'm mostly guessing here.