Siemens HJXD63B300L - 300 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Siemens HJXD63B300L is a 300A, 600V, 3-pole molded case circuit breaker engineered to deliver dependable branch circuit protection in panelboards and load centers. Built to stand up to everyday electrical demand, this device helps safeguard residential, commercial, and light industrial distributions with precise, reliable performance.

Key design features that set the HJXD63B300L apart:

• Compact molded-case design optimizes panel space, enabling efficient layouts in tight enclosures without sacrificing protection.
• Thermal-magnetic trip unit delivers stable, repeatable protection as loads change, reducing nuisance trips and improving system reliability.
• 3-pole configuration provides balanced, three-phase protection ideal for modern electrical systems.
• 300A, 600V rating ensures it can handle substantial branch circuit loads while maintaining clear, decisive protection.
• OEM compatibility designed to pair with matching Siemens OEM load centers and panelboards for straightforward replacement and seamless integration.

Who should consider the HJXD63B300L? electricians, facilities managers, and building owners looking for a dependable, industry-standard solution to protect branch circuits in panelboards and load centers. It’s well-suited for installations where space is at a premium, where three-phase protection is required, and where compatibility with Siemens OEM gear simplifies maintenance and upgrades.

Technical specifications

• Manufacturer: Siemens
• Part Number: HJXD63B300L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 300A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

In practice, the Siemens HJXD63B300L helps you maintain safer electrical distributions with fewer interruptions. Use it in panelboards or loadcenters designed for OEM compatibility, and pair it with appropriate wiring conductors and protection coordination to achieve reliable performance across residential, commercial, and light industrial installations.