Siemens | JXD63H400L | Circuit Breaker | 400A | 3-Pole | 600V

The Siemens JXD63H400L Circuit Breaker delivers dependable, three‑phase protection for demanding electrical systems. With a 400A rating and a 600V operating capability, this 3‑pole unit is built for maintenance, retrofit, and replacement projects where exact specifications matter. Designed to harmonize with compatible Siemens panels and distribution gear, it provides predictable protection and reliable performance in commercial and industrial environments.

Key specifications

• Amperage: 400A
• Poles: 3‑Pole
• Voltage: 600V
• Part number: JXD63H400L

Ideal applications

• Maintenance and upgrade projects in commercial or light industrial panels
• Retrofit needs where a precise 3‑phase, 400A protection solution is required
• Replacement for worn or obsolete breakers within Siemens-compatible distribution systems

Why this breaker stands out

Choosing the JXD63H400L means selecting a component purpose-built for Siemens‑compatible electrical ecosystems. The 3‑pole design ensures simultaneous disconnection of all phases, enhancing personnel safety and reducing arc risk in three‑phase circuits. Its 400A capacity supports high‑demand equipment and motors, while the 600V rating suits a wide range of industrial power networks. This combination delivers a reliable, drop‑in solution that minimizes downtime during upgrades and repairs.

Compatibility and buying tips

Notes: Confirm fit and ratings before ordering. The part number is the best reference for compatibility. When planning a retrofit or replacement, cross‑check the panel labeling and any manufacturer documentation to ensure seamless integration with your Siemens distribution gear.

Installation and safety

Installation should be performed by a qualified electrician in accordance with local electrical codes and panel manufacturer guidelines. Ensure the power is fully de‑energized and lockout/tagout procedures are followed before service or replacement work.