Within its Mersen family, HSJ400 is a Class J high-speed current-limiting fuse, with 400A current capacity and 600VAC / 500VDC, suited to drives, motor controllers and power-semiconductor circuits in a blade format.
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HSJ400 belongs to Mersen’s HSJ range and is configured as a Class J high-speed current-limiting fuse for drives, motor controllers and power-semiconductor circuits. The model carries a 400A rating with 600VAC / 500VDC; low-I²t Class J protection with 200kA AC and 100kA DC interrupting ratings is paired with blade mounting. Confirm installation details and coordination against the official Mersen datasheet before design release.
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