Siemens | JXD23B400L | Circuit Breaker | 400A | 3-Pole | 240V | Feed-Through

Siemens JXD23B400L is a rugged 400A, 3-pole feed-through circuit breaker designed for demanding electrical installations. With a 240V rating, this unit is purpose-built for maintenance, retrofit, and replacement projects where reliable isolation and easy wiring are essential.

• 400 A
• 3-Pole
• 240V
• Feed-Through
• Part number JXD23B400L for compatibility

Why engineers and electricians choose this Siemens breaker. The 3-pole, 240V configuration delivers simultaneous interruption across all phases, reducing fault risk in high-current panels. The feed-through design simplifies wiring runs, making retrofits and panel upgrades quicker and cleaner while preserving the integrity of the main assembly.

Ideal use cases

• Maintenance and service upgrades in commercial or industrial panels that require a precise 400A, 3-pole solution
• Retrofit projects where existing equipment relies on Siemens JXD-series compatibility
• Replacement of worn or outdated breakers in high-load 240V circuits

Compatibility and ordering tips

Confirm fit and ratings before ordering. The part number JXD23B400L is the best reference for compatibility with your Siemens panel and existing gear. This ensures seamless integration with minimal reconfiguration and maintained electrical safety standards.

Practical considerations for installation and use

• Verify panel labeling and service requirements match a 400A, 3-pole, 240V feed-through configuration
• Plan for proper clearance and handling during replacement to maintain safety margins
• Engage a licensed electrician to perform installation and testing to ensure correct operation and compliance

Designed with reliability in mind, the Siemens JXD23B400L delivers robust protection for high-demand circuits while offering the wiring flexibility of a feed-through design. When you need a precise, upgrade-ready breaker that aligns with Siemens systems, this 400A, 3-pole, 240V solution is built to meet the challenge.