For 300A circuit protection, A4BQ300-TA is a catalog member of Mersen’s A4BQ Series. The datasheet specifies 600V AC / 500V DC and 200kA AC / 100kA DC interrupting capability. The series is intended for applications needing 4-second time delay at 500% rating and very high current limitation. This catalog code identifies the TA remote blown-fuse trigger actuator option.
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Part A4BQ300-TA belongs to the Mersen A4BQ Series and is rated 300A. Selection data centers on a 600V AC / 500V DC voltage rating and 200kA AC / 100kA DC interrupting rating. A key selection characteristic is 4-second time delay at 500% rating and very high current limitation. The Class L format uses blade terminals with cartridge/clip mounting. Typical selection contexts include Large Motors, Lighting & Heating, Circuit Breaker Backup. This SKU is the TA remote blown-fuse trigger actuator option. Check the official Mersen datasheet before final equipment coordination.
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