Part A4BY4000 covers the 4000A rating point in Mersen’s A4BY Series. The electrical profile is 600V AC, with 200kA AC published interrupting performance. 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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A4BY4000 is Mersen’s 4000A catalog option in the A4BY Series. The published rating combines 600V AC operation and 200kA AC short-circuit 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 Feeders, Circuit Breakers, Load Centers. Check the official Mersen datasheet before final equipment coordination.
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