Replacement Fluke meter fuse for the Fluke meters shown below. Fluke references meter fuse holders by the markings "F1", "F2" or "F3." Since Fluke meter fuses may be used in different meters, in different fuse positions, we have listed in the chart below for each meter the correct fuse position. Fuse measures 10mm x 35mm and is a fast-acting, "fast blow" type fuse. Fast blow fuses are not appropriate for protecting equipment from voltage surges on standard AC power lines.