Siemens JXD62B400L - 400 A, 600 V, 2-Pole Circuit Breaker | AmpState

Meet the Siemens JXD62B400L, a 400A, 600V, 2-pole molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Sold by AmpState, this breaker is built to fit seamlessly into modern electrical enclosures while optimizing space and safety.

• Compact molded case design maximizes panel space, enabling cleaner, more organized installations in residential, commercial, and light industrial environments.
• Thermal-magnetic trip unit provides stable, repeatable protection performance across a range of operating temperatures, helping to prevent nuisance trips while safeguarding wiring and equipment.
• 2-pole configuration delivers common-trip protection for both hot conductors, ensuring coordinated shutdown in the event of a fault.
• High current capability with a 400A amperage rating suitable for demanding branch circuits and service feeders within panelboards and load centers.
• 600V rating supports typical commercial and light industrial wiring, expanding its applicability beyond basic residential use.
• OEM-compatible design ensures reliable fit and coordination with matching Siemens OEM load centers and panelboards for consistent performance and labeling.

Technical specifications

Why this breaker matters

In any panelboard or load center, protecting each branch circuit from overloads and short circuits is critical. The Siemens JXD62B400L combines a compact footprint with a robust thermal-magnetic trip mechanism, delivering reliable protection that stays consistent across temperature swings and load conditions. Its 2-pole design ensures synchronized disconnection of both hot conductors, which is essential for safe operation in multi-wire branch circuits. Whether you’re outfitting a new commercial space, upgrading a service panel in a light industrial setting, or extending a residential distribution panel, this unit provides the performance and compatibility you need.

Key use cases include installing in main service panels or subpanels, upgrading panel capacity to handle higher loads, and integrating into equipment enclosures that require dependable branch circuit protection with clear OEM alignment. With Siemens’ engineering and AmpState’s dependable distribution, you get a trustworthy solution that helps you meet code expectations while keeping maintenance practical.