Mersen positions A4J1 as a Class J fast-acting current-limiting fuse; electrical selection centers on 1A and 600VAC / 300VDC, suited to feeders, panelboards and general high-fault-current circuits in a cartridge / clip format.
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A4J1 is a A4J product from Mersen, built as a Class J fast-acting current-limiting fuse for feeders, panelboards and general high-fault-current circuits. For coordination, the page records 1A, 600VAC / 300VDC, Class J current limitation with 200kA AC and 100kA DC interrupting ratings, plus the cartridge / clip connection style. Confirm installation details and coordination against the official Mersen datasheet before design release.
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