Mersen A4BY800 provides a 800A rating within the A4BY Series. Published electrical limits are 600V AC / 300V DC with 200kA AC / 100kA DC short-circuit 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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Designed within Mersen’s A4BY Series, A4BY800 carries a 800A rating and Class L form factor. Its electrical envelope is 600V AC / 300V DC, supported by 200kA AC / 100kA DC interrupting data. 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 Switchboards, Mains, Feeders. Check the official Mersen datasheet before final equipment coordination.
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