ABB S5N - 400A, 3-Pole, Molded Case Circuit Breaker

ABB S5N - 400A, 3-Pole, Molded Case Circuit Breaker delivers dependable overcurrent protection for industrial power distribution. With a 400A rating and a true 3-pole design, this MCCB is engineered to handle three-phase loads with precision, enabling safe, controlled shutdown during faults in panelboards, switchboards, and control panels.

Key advantages that matter in the field

• 400A current rating supports high-demand circuits in industrial environments without compromising protection.
• 3-Pole configuration provides balanced protection for three-phase systems, ensuring coordinated tripping across all phases.
• Molded case construction offers a compact, modular footprint ideal for dense panel layouts and streamlined system integration.
• Versatile installation suitable for panelboards, switchboards, and control panels in a wide range of settings.
• Reliable protection for distribution and motor-control applications—a trusted solution in industrial, commercial, and OEM environments where safety and uptime are critical.

Who benefits most

Electrical engineers, panel builders, OEM equipment manufacturers, and maintenance teams will find the ABB S5N MCCB indispensable when building or upgrading power distribution and motor-control centers. It’s ideal for applications that demand consistent short-circuit and overcurrent protection with straightforward integration into existing 3-phase systems.

Practical use cases

• Primary protection in distribution panels and switchgear for manufacturing lines and processing facilities.
• Protecting feeders and motor circuits within motor control centers (MCCs) and large control panels.
• Replacement or retrofit in commercial-grade switchboards where robust, long-life protection is required.

Performance and installation considerations

For optimal operation, pair the ABB S5N with compatible upstream protection devices to achieve proper coordination and minimize nuisance trips. Its three-pole design makes it suitable for standard three-phase power systems, and it integrates with common panelboard and switchboard architectures used in industrial and OEM settings. Ensure installation is performed by qualified personnel following all applicable electrical standards and safety guidelines.

Why choose this over generic breakers

The ABB S5N brings a proven track record of reliability in demanding environments, backed by ABB’s engineering commitment to precision protection. Its molded case design delivers a compact, durable solution capable of withstanding the rigors of continuous operation in distribution panels and motor control centers, while maintaining clear, predictable trip behavior across three phases.