Siemens JXD22B350L - 350 A, 240 V, 2-Pole Circuit Breaker | AmpState

Meet the Siemens JXD22B350L — a rugged 350A, 240V, 2-pole molded case circuit breaker engineered to reliably guard your branch circuits in panelboards and load centers. When protection matters, this unit delivers predictable, fast-acting response to overloads and short circuits, keeping electrical systems safe and uptime high.

Designed for space-conscious installations, the compact molded-case design streamlines panel layouts, freeing room for feeders, subfeeds, and future expansion. The thermal-magnetic trip unit provides stable, repeatable protection across a broad range of temperatures and load conditions, helping coordinate overcurrent protection with adjacent breakers for safer, more predictable operation.

What makes this breaker different

• High-capacity protection: 350A rating at 240V handles large branch circuits and heavy equipment with confidence.
• Thermal-magnetic trip: Combines thermal and magnetic sensing for accurate, consistent tripping under overloads and short circuits.
• Panel compatibility: Specifically designed to be used with Siemens OEM loadcenters and panelboards, ensuring proper fit and reliable performance.
• Versatile applications: Suitable for residential, commercial, and light industrial environments where robust protection is required.

Technical specifications at a glance:

• Manufacturer: Siemens
• Part Number: JXD22B350L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 350 A
• Voltage Rating: 240 V
• Number of Poles: 2
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

• Feeding large residential subpanels or main distribution panels where higher current protection is required.
• Commercial lighting and HVAC circuits that demand rapid isolation during faults.
• Light industrial equipment circuits that benefit from robust, space-efficient protection in compact panelboards.

Installation tips

• Ensure the breaker matches the OEM loadcenter/panelboard model for proper bus compatibility and mounting.
• Follow applicable electrical codes and manufacturer instructions during installation and testing.
• Coordinate with adjacent breakers to maintain selective protection and minimize nuisance trips.