4.0M5X20F
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30899101-4.0M5X20F
Cartridge Fuses Fuse, Miniature, 5x20mm 4A, 250V, fast blow
The DC Voltage ratings are the AC voltage values times 1.41 (usually rounded).
Current rating is the maximum current that a fuse will carry for an indefinite period without too much deterioration of the fuse element.