Siemens JXD22B400L - 400 A, 240 V, 2-Pole Circuit Breaker | AmpState

Meet the Siemens JXD22B400L, a robust 2-pole molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. With a 400A rating at 240V, this breaker is built to handle demanding residential, commercial, and light industrial applications while preserving space within your electrical panel.

• Compact molded case design maximizes panel space, giving you more room for essential wiring and future expansion without compromising protection.
• Thermal-magnetic trip unit delivers stable, repeatable protection against overloads and short circuits, reducing nuisance trips and ensuring reliable response when faults occur.
• 400A, 240V, 2-pole configuration provides strong, coordinated protection for main feeders or large branch circuits, suitable for high-current installations.
• OEM-compatible designed to integrate with matching Siemens OEM loadcenters and panelboards, ensuring a seamless, reliable fit and consistent performance.
• Versatile across settings ideal for residential service upgrades, commercial electrical rooms, and light industrial panel protection where space and reliability matter.

Technical snapshot

• Manufacturer: Siemens
• Part Number: JXD22B400L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 400A
• Voltage Rating: 240V
• Number of Poles: 2
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

Use the JXD22B400L as a main disconnect for a large residential service, as a primary feeder breaker feeding a subpanel in a commercial space, or as a high-capacity protective device within a loadcenter. Its compact footprint and reliable thermal-magnetic protection make it a practical, long-lasting choice for configurations where space is at a premium and protection cannot be compromised.

Why this Siemens breaker stands out

Rather than a generic solution, the JXD22B400L is purpose-built to slot into Siemens’ protection ecosystem. That means consistent trip characteristics, straightforward field replacement, and dependable performance across compatible panelboards and loadcenters. If you’re upgrading or maintaining a high-current electrical system, this 400A, 240V, 2-pole breaker delivers clear, tangible protection you can trust.