Siemens MXD63B800HL - 800 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens MXD63B800HL, an 800A, 600V, 3-pole bolt-on molded case circuit breaker engineered for dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Built to thrive in residential, commercial, and light industrial environments, this breaker delivers unmatched reliability where it matters most — in the heart of your electrical distribution system.

Why the MXD63B800HL stands out

• Secure bolt-on mounting: a rigid, vibration-resistant bus connection that stays locked in place even in crowded or movement-prone panels.
• Thermal-magnetic trip unit: combines precise overload protection with instantaneous magnetic tripping for short circuits, ensuring stable, repeatable protection across diverse loads.
• 3-pole design for 3-phase systems: coordinated protection across all phases reduces the risk of unbalanced faults and streamlines panel coordination.
• 600V rating and 800A capacity: designed to handle high-demand feeders and equipment in commercial and light industrial applications without compromising safety.
• OEM-compatible integration: engineered to pair with matching Siemens OEM load centers and panelboards for straightforward installation and reliable performance.

Ideal applications and use cases

• Residential and small-to-mid commercial panels where durable protection and space-efficient, bolt-on mounting are critical.
• HVAC and mechanical room distribution that require solid 3-phase protection with fast fault clearing.
• Light industrial feeder circuits and large motor loads needing robust branch-circuit protection with predictable trip behavior.
• New installations or replacements in projects prioritizing Siemens-compatible components for cohesive procurement and maintenance.

Performance and reliability you can trust

The MXD63B800HL embodies Siemens’ commitment to long-term protection. The combination of a secure bolt-on design, a thermal-magnetic trip unit, and OEM compatibility translates to fewer field adjustments, easier installation, and dependable operation in challenging environments. With an 800A rating and a 600V capability, it’s ready to safeguard high-current circuits while maintaining stable performance across varying loads and conditions.

Technical snapshot

• Manufacturer: Siemens
• Part number: MXD63B800HL
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 800 A
• Voltage rating: 600 V
• Poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection