Voltcraft 6ff 1 635mm quick response multimeter fuses voltcraft 6ff 1 400ma the voltcraft 6ff 1 400ma is a 635mm quick response multimeter fuse offering continually reliable performance as well as a cost effective circuit protectionthis 635 x 318mm fuse is rated at 600v 400ma and has been encased in a ceramic tube plus extinguishing agent the ends have been sealed with a nickel plated brass cap voltcraft 6ff 1 635 x 318mm 400ma600v multimeter fuse