Siemens JXD23B400 - 400A, 3-Pole, Circuit Breaker

Meet the Siemens JXD23B400, a powerhouse 400A, 3-pole circuit breaker designed to anchor the heart of your electrical distribution. With a three-pole configuration, it delivers coordinated protection across all three phases, helping prevent phase imbalance and ensuring rapid, reliable interruption when faults occur.

Engineered for industrial, commercial, and OEM environments, this breaker provides dependable overcurrent protection and safe operation in distribution panels and motor control centers. Its rugged, purpose-built design from Siemens translates into lasting reliability where downtime is costly and safety is non-negotiable.

Why the JXD23B400 stands out

• High-current capability: A robust 400A rating supports large feeders and motor circuits without compromising safety or performance.
• Three-pole synchronization: Ensures simultaneous tripping across all phases, eliminating protection gaps in 3-phase systems.
• Versatile installation: Perfect for panelboards, switchboards, and control panels, as well as distribution setups in motor control centers.
• Industrial-grade reliability: Built to endure demanding environments, delivering consistent protection and safe operation over the long term.
• OEM-ready: A natural fit for original equipment manufacturers integrating robust overcurrent protection into custom equipment.

Practical applications and scenarios

Use the JXD23B400 to safeguard feeders feeding large motors, pumps, conveyors, and HVAC systems. In a panel rack or switchgear assembly, it can serve as the main protective device or as branch protection for critical circuits, enabling quick fault isolation and minimizing collateral damage to downstream equipment.

Key specifications at a glance

• Current rating: 400A
• Poles: 3-Pole
• Breaker type: Circuit Breaker

Choosing Siemens JXD23B400 means investing in a trusted, high-capacity protection solution that aligns with professional electrical design and safety standards. Whether upgrading an existing distribution panel or integrating into a new motor control center, this 3-pole breaker delivers clear protection, steady performance, and long-term value.