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The AJT400 – GOULD 400A 600V CLASS J TIME DELAY FUSE is designed for high-performance applications, providing reliable protection against overloads and short circuits. With its time-delay feature, it allows for temporary inrush currents without tripping, ensuring stability in your electrical systems. Perfect for industrial and commercial use, this fuse guarantees safety and efficiency.
Both are 600V Class J time-delay fuses with a 200kA interrupting rating, but the AJT series uses standard Class J dimensions, while the AJT-SP (and equivalent Bussmann LPJ-SP) features an additional rejection feature to prevent substitution with non-current-limiting fuses. For most industrial Class J holders, the AJT400 is the correct choice — contact us if you're unsure which series your equipment requires.
Yes. The AJT400's time-delay characteristic makes it well suited for protecting motors, transformers, and other loads that draw high inrush currents at start-up. The time-delay allows temporary inrush without nuisance opening, while still providing fast response to sustained overloads and short circuits up to 200kA.
The Gould brand was acquired by Mersen (formerly Ferraz Shawmut), and the AJT series continues to be produced under the Mersen name. Northern Breaker Group specialises in both current-production and hard-to-find electrical components across Canada. Contact our Calgary, Edmonton, or Vancouver counters or request a quote online and we'll confirm availability and lead time.
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