A6K400R combines Mersen engineering with a Class RK1 fast-acting current-limiting fuse, specified at 400A across a 600VAC / 300VDC system rating, suited to high-fault-current feeder and backup protection in a blade format.
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In high-fault-current feeder and backup protection designs, Mersen A6K400R serves as a Class RK1 fast-acting current-limiting fuse matched to the series architecture. The configuration combines a 400A current rating, 600VAC / 300VDC, blade mounting, and Class RK1 current-limiting protection with a 200kA AC interrupting rating. Confirm installation details and coordination against the official Mersen datasheet before placing it into a design.
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