The Mersen A4J125 product is a Class J fast-acting current-limiting fuse, carrying 125A with a 600VAC / 300VDC system rating, suited to feeders, panelboards and general high-fault-current circuits in a blade format.
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Designed around feeders, panelboards and general high-fault-current circuits, A4J125 combines the A4J platform with Class J fast-acting current-limiting fuse characteristics. 125A and 600VAC / 300VDC define the primary electrical envelope, while Class J current limitation with 200kA AC and 100kA DC interrupting ratings and blade describe protection and fit. Confirm installation details and coordination against the official Mersen datasheet before design release.
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