For engineering selection, Mersen A4J6 is a Class J fast-acting current-limiting fuse, specified at 6A across a 600VAC / 300VDC rating, suited to feeders, panelboards and general high-fault-current circuits in a cartridge / clip format.
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Mersen positions A4J6 in the A4J family for feeders, panelboards and general high-fault-current circuits, using a Class J fast-acting current-limiting fuse format. The configuration combines a 6A current rating, 600VAC / 300VDC, cartridge / clip mounting, and Class J current limitation with 200kA AC and 100kA DC interrupting ratings. Confirm installation details and coordination against the official Mersen datasheet before design release.
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