Yes, it has a fuse, as well as a megaton and an inverter. Unfortunately, ever since countertop microwaves of all brands have been made in China, there are no parts listings for them. Please call 800-657-6119 for parts, if available.
Due to production delays stemming from the pandemic, current models are out of stock or on backorder. Here's a similar 2.2 cu ft model from Frigidaire if you need a replacement: sears.com/frigidaire-gallery-fgmo226nuf-2.2-cu-ft-built/p-A105254268?sellerId=SEARS
Hope this helps!