Siemens JXD23B400L - 400 A, 240 V, 3-Pole Circuit Breaker | AmpState

Siemens JXD23B400L is a 400A, 240V, three-pole molded case circuit breaker crafted to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for real-world electrical environments, this unit keeps distribution safe and reliable across demanding loads.

Its compact molded case design maximizes panel space, making it easier to fit high-capacity protection without sacrificing room for other circuits. The thermal-magnetic trip unit provides stable, repeatable protection performance, delivering precise response to both overloads and short circuits while minimizing nuisance trips.

Key advantages at a glance:

• 400A, 240V, 3-pole — ideal for 3-phase feeders and high-load branch circuits.
• Compact molded-case construction — efficient use of panel space and straightforward integration into existing installations.
• Thermal-magnetic trip — reliable protection with predictable trip behavior across varying loads and conditions.
• OEM-compatible — designed to pair seamlessly with matching Siemens load centers and panelboards for cohesive protection schemes.
• Versatile applications — suitable for residential, commercial, and light industrial environments where dependable overcurrent protection is essential.

Technical snapshot:

• Manufacturer: Siemens
• Part number: JXD23B400L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 400A
• Voltage rating: 240V
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Whether you’re upgrading a panelboard, replacing a legacy unit, or deploying a new installation, the JXD23B400L from Siemens delivers robust protection with space-conscious design. It’s a practical, reliable choice for protecting electrical infrastructure and keeping systems running smoothly with fewer interruptions.