Mersen specifies A4BY2001 as a 2001A device in the A4BY Series. Its key ratings are 600V AC / 300V DC and 200kA AC / 100kA DC interrupting capability. Its selection value is strongest where the circuit needs 4-second minimum time delay at 500% rating for service and feeder protection.
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For applications specifying Class L, Mersen A4BY2001 supplies the 2001A rating in the A4BY Series. Electrical limits are 600V AC / 300V DC, with 200kA AC / 100kA DC interrupting capability. The design focuses on 4-second minimum time delay at 500% rating for service and feeder protection. The Class L format uses blade terminals with cartridge/clip mounting. Typical selection contexts include Panelboards, Switchboards, Mains. Check the official Mersen datasheet before final equipment coordination.
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