Fuse rated 10 A, part 68608, for Hanovia medium-pressure ultraviolet disinfection systems, protecting the supply to the lamp control gear. The rating is specified against the lamp and gear fitted and must be matched — the same range also uses a 16 A fuse under part 67472. Substituting a higher rating to stop a fuse blowing removes the protection the circuit was designed with and hides the fault that caused it. Reference number 2277-0310.