Siemens 400 Amp 3 Pole Circuit Breaker

A Siemens 400 amp 3 pole circuit breaker is designed for high-capacity electrical distribution applications in commercial buildings, industrial facilities, manufacturing plants and other large electrical systems. These breakers provide protection for three-phase circuits against overloads and short circuits and are commonly used in switchboards, panelboards and electrical distribution equipment. Siemens manufactures several families of 400 amp molded case circuit breakers, with different frame sizes, voltage ratings, interrupting capacities and trip unit configurations. Selecting the correct breaker requires identifying the specific model and matching its electrical and physical specifications to the existing equipment.

Siemens 400 Amp Industrial Circuit Breaker Models

Siemens 400 amp three-pole breakers are available in different product families, including JD-frame and 3VA molded case circuit breakers. Depending on the model, breakers may feature thermal-magnetic or electronic trip units, different interrupting ratings and various terminal and mounting configurations. Some models are designed for particular voltage applications or electrical distribution systems, making it important to verify the manufacturer's catalog number before purchasing a replacement. ESU can help locate specific Siemens 400 amp breakers, including older, discontinued and hard-to-find models, depending on availability.

When identifying a Siemens 400A 3 pole circuit breaker, check the manufacturer's label for the catalog number, ampere rating, voltage rating, frame designation and interrupting capacity. The breaker must also be compatible with the existing switchgear, panelboard or enclosure. Breakers with the same 400 amp rating are not automatically interchangeable, even when they are manufactured by the same company. Confirming the exact model and application requirements is essential when sourcing replacement electrical equipment.

Buy and Sell Siemens 400 Amp Circuit Breakers

Electrical Supplies Unlimited (ESU) buys and sells Siemens 400 amp circuit breakers, along with a wide range of new, used, surplus, obsolete and discontinued electrical equipment. Whether you are an electrical contractor replacing an existing breaker, a facility manager maintaining industrial equipment or a business looking to sell surplus inventory, ESU has more than 40 years of experience helping customers source hard-to-find electrical components. We work with electricians, contractors, manufacturers, distributors, commercial facilities and industrial businesses throughout the United States.

If you need to buy a Siemens 400 amp three-pole circuit breaker or have one available for sale, contact Electrical Supplies Unlimited. We purchase surplus Siemens breakers and other electrical equipment and can help locate specific replacement models depending on availability. Call 858-558-2850 with the breaker catalog number, a photograph of its identification label and any available equipment information. Our team can help determine which breaker you need and assist with sourcing the correct electrical component.