National 801-050 Replacement Fuse (220V/0.5 Amp) Tweet Description The National 801-050 Replacement Fuse (220V/0.5 Amp) is a 200 volt, 0.50 Amp replacement fuse. Details Additional Category Tags: Microscope Accessories Category: Optics Manufacturer Catalog Number: 801-050 Product Manufacturer: National Subcategory: Microscopes