The MDL1 fuse from Bussmann (now Eaton) is a compact 6.3 × 32 mm, glass-tubed time-delay fuse rated for 1 A at 250 V AC. It features nickel-plated brass end caps and a clear glass body for visible filament status, and its time-delay characteristic suits circuits with brief inrush currents, such as power supplies, instrumentation, control panels, and small motor drives. With an interrupting rating up to 35 A at 250 V AC, the MDL1 provides reliable protection while tolerating transient surges; it is commonly sold in packs of five to facilitate stocking and replacements. The MDL family includes MDL-1-R as a close variant with the same 6.3 × 32 mm form factor and 1 A, 250 V rating, offering compatibility with standard MDL fuse holders.
