Siemens HHJXD63B400L - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HHJXD63B400L is a rugged 400 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to safeguard large branch circuits in panelboards and load centers. Built for dependable protection in demanding environments, this unit combines a secure mechanical connection with precise electrical trip behavior to keep your systems up and running. Why this breaker stands out - Secure bolt-on mounting: A rigid connection to the bus bar minimizes vibration-induced loosening and ensures consistent electrical contact in panels exposed to vibration or movement. - Thermal-magnetic trip unit: The thermal element provides stable overload protection across temperature variations, while the magnetic element delivers instantaneous interruption during short-circuit events for immediate system protection. - 3-pole configuration: Ideal for 3-phase power distribution, supporting balanced protection of multi-phase equipment and loads. - High-current capability: 400 A rating makes it suitable for large branch circuits, feeders, and equipment in commercial and light industrial settings. - 600 V rating: Designed to handle typical commercial and industrial distribution requirements with reputable Siemens reliability. - OEM-compatible: Designed to work with matching Siemens OEM load centers and panelboards, simplifying replacements and upgrades without mismatched components. - Broadly applicable: Suitable for residential, commercial, and light industrial applications where robust, code-compliant overcurrent and short-circuit protection is essential. Practical use cases - Upgrading or replacing a failing breaker in commercial panelboards feeding high-current equipment like motor starters, pumps, or HVAC controls. - Installing a reliable main feeder protection in load centers that require a sturdy bolt-on solution with a compact, 3-pole form factor. - Refurbishing service panels in light industrial environments where consistent thermal-magnetic protection supports reliability and uptime. What you get with this unit - Type: Thermal-magnetic molded case circuit breaker - Amperage Rating: 400 A - Voltage Rating: 600 V - Number of Poles: 3 - Mounting Style: Bolt-on - Application: Branch circuit overcurrent and short-circuit protection Specifications at a glance - Manufacturer: Siemens - Part Number: HHJXD63B400L - Category: Thermal-magnetic molded case circuit breaker - Compatibility: Matching OEM load centers and panelboards - Intended environments: Residential, commercial, and light industrial installations requiring durable, reliable overcurrent protection