Within the Mersen range, OT400 is a Class K5 fast-acting one-time fuse, with a 400A current rating and 250VAC / 250VDC, suited to feeder, branch-circuit and resistive-load protection in a blade format.
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OT400 belongs to Mersen’s OT range and is configured as a Class K5 fast-acting one-time fuse for feeder, branch-circuit and resistive-load protection. The model carries a 400A rating with 250VAC / 250VDC; Class K5 fast-acting protection with a 50kA interrupting rating is paired with blade mounting. Confirm installation details and coordination against the official Mersen datasheet before placing it into a design.
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