Siemens JXD63B400HL - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Introducing the Siemens JXD63B400HL, a high-capacity 400A, 600V, 3-pole molded case circuit breaker designed to protect branch circuits with precision and reliability. Built for panelboards and load centers, it delivers dependable overcurrent and short-circuit protection across residential, commercial, and light industrial applications.

• Compact molded case design maximizes panel space, allowing cleaner, more organized electrical distributions in both new installations and upgrades.
• Thermal-magnetic trip unit provides stable, repeatable protection by responding to long-term overcurrents and instantly interrupting severe short circuits, reducing mis-trips and equipment damage.
• 3-pole configuration ensures synchronized protection for three-phase systems, helping maintain balance and prevent nuisance trips in multi-wire loads.
• OEM loadcenter compatibility designed to pair with matching Siemens OEM loadcenters and panelboards for straightforward installation and reliable performance.
• Versatile用途 suitable for residential, commercial, and light industrial environments where robust feeder protection is essential.

Technical snapshot

• Amperage rating: 400 A
• Voltage rating: 600 V
• Number of poles: 3
• Type: Thermal-magnetic molded case circuit breaker

Why this breaker matters in your electrical system

• When protecting large feeder circuits or service entrances, the JXD63B400HL provides rapid magnetic trip for short-circuit events while offering stable, predictable behavior under normal load conditions.
• Its compact, molded-case construction helps maximize panel capacity without compromising protection, making it a practical choice for panel refreshes or new builds where space is at a premium.
• OEM compatibility minimizes installation troubleshooting and ensures the protection scheme remains consistent with your existing Siemens panel infrastructure.

Ideal use scenarios

• Feeder protection for commercial distribution panels serving lighting, outlets, and essential equipment
• Primary protection in 3-phase service panels within light industrial facilities
• Upgrade candidate in residential-commercial multi-tenant buildings requiring robust 400 A protection

With the Siemens JXD63B400HL, you’re choosing a trusted, purpose-built solution that blends space efficiency, precise protection, and seamless integration—backed by Siemens engineering designed to keep your electrical system safer and more reliable over the long run.