Within its Mersen family, A4J3 is a Class J fast-acting current-limiting fuse; this configuration is rated 3A and 600VAC / 300VDC, suited to feeders, panelboards and general high-fault-current circuits in a cartridge / clip format.
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A4J3 belongs to Mersen’s A4J range and is configured as a Class J fast-acting current-limiting fuse for feeders, panelboards and general high-fault-current circuits. Rated at 3A and 600VAC / 300VDC, this version uses cartridge / clip mounting and is characterized by 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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