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The SIEFD63T110 is a high-quality SIEMENS 110A trip designed specifically for FD frame circuit breakers. Engineered for optimal performance and reliability, this trip unit ensures accurate protection and enhances your electrical system’s safety. Ideal for both residential and commercial applications, trust SIEMENS for exceptional durability and efficiency in your electrical setup.
A trip unit is the overcurrent sensing and tripping mechanism within a molded-case circuit breaker. On Siemens FD frame breakers, the trip unit is field-replaceable, meaning you can swap out the SIEFD63T110 to restore protection or change the amp rating without replacing the entire breaker body — saving significant cost. This work should be performed by a qualified electrician in accordance with applicable Canadian Electrical Code requirements.
Yes — Siemens FD frame breakers and their trip units are designed for commercial and industrial applications in panelboards and switchboards rated for 600 V class service. They are not intended for residential loadcentres. If you're unsure whether this trip unit suits your specific installation, contact our team with your panel and breaker details and we'll advise.
Northern Breaker Group specializes in obsolete and hard-to-find electrical components, including Siemens FD frame trip units. Even if the SIEFD63T110 is discontinued through standard supply channels, we work hard to source it for you. Reach out to our Calgary, Edmonton, or Vancouver counter — or request a quote online — and we'll check current availability.
