Toshiba E400B - 250A, 3-Pole, Circuit Breaker

Meet the Toshiba E400B 250A 3-Pole Circuit Breaker — a sturdy, dependable cornerstone for safeguarding your three-phase electrical systems. With a 250-amp current rating and a 3-pole configuration, this breaker interrupts fault currents quickly across all phases, protecting wiring, motors, and control circuits with a coordinated trip.

Designed for demanding environments, it integrates seamlessly into panelboards, switchboards, and control panels. The E400B is built to withstand industrial and commercial settings, helping minimize unplanned downtime and extending the life of your distribution network. Its robust construction and reliable performance make it a trusted choice for both new installations and upgrades in OEM equipment.

Key specifications at a glance

• Current rating: 250A
• Poles: 3-Pole
• Breaker type: Circuit Breaker

Why the 3-Pole design makes a difference

In three-phase systems, simultaneous interruption of all lines is essential for equipment safety and coordinated protection. The Toshiba E400B delivers this across all phases, reducing the risk of phase imbalance, arc flash potential, and nuisance trips from unbalanced faults. This makes it an ideal main protection device for motor control centers and distribution panels where dependable, synchronized tripping is critical.

Ideal for

• Industrial facilities with three-phase motors and drives
• Commercial buildings with complex distribution networks
• OEMs incorporating robust overcurrent protection into equipment
• Maintenance teams seeking reliable, long-life protection for critical circuits

Use cases and practical applications

• Protection for main feeders in panelboards and switchboards
• Motor control centers requiring reliable three-phase protection
• Protective upgrading for legacy systems where coordinated tripping is essential

Smart considerations for selection and installation

Choosing the Toshiba E400B means selecting a purpose-built device for reliable overcurrent protection in 3-phase applications. Its 3-pole design aligns with standard industrial and commercial layouts, supporting code-compliant installation and straightforward integration with compatible Toshiba configurations. When installing, verify compatibility with your panel design and follow established electrical guidelines to ensure secure mounting and dependable operation.

With the Toshiba E400B 250A 3-Pole Circuit Breaker, you gain a trusted, efficient solution that helps protect critical assets, minimize downtime, and maintain safer, more stable electrical distribution across your facility.