Siemens CMD63A800 - 800 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens CMD63A800 is a rugged 800A, 600V, 3-pole bolt-on molded case circuit breaker engineered for dependable protection in your electrical distribution system. Designed for panelboards and load centers, it delivers precise overcurrent and short-circuit protection where reliability matters most—from residential upgrades to commercial and light industrial installations.

Key features and practical benefits:

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection. This reduces connection looseness and electrical noise, helping maintain consistent protection even in environments with equipment vibration or heavy switching loads.
• Thermal-magnetic trip unit offers stable, repeatable protection for both overload and short-circuit events. The combination of thermal and magnetic sensing adapts to changing current conditions, helping prevent nuisance trips while safeguarding wiring and devices.
• 3-pole design is ideal for balanced 3-phase power systems, ensuring coordinated protection across all phases and simplifying integration into standard 3-phase panelboards and load centers.
• OEM compatibility works seamlessly with matching Siemens panelboards and load centers, helping you maintain a cohesive, reliable electrical infrastructure without compatibility guesswork.
• Versatile application suitable for residential projects with high-load requirements, commercial suites, and light industrial setups that demand robust branch-circuit protection and fast response to fault conditions.
• Branch circuit protection designed to guard downstream circuitry and equipment, reducing the risk of damage from overcurrent and short circuits and supporting safer, longer-lasting electrical systems.

• Manufacturer: Siemens
• Part Number: CMD63A800
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 800A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for professionals upgrading or expanding Siemens-based electrical systems, the CMD63A800 provides a proven, durable solution when you need high-capacity protection with straightforward installation. Its bolt-on design simplifies mounting, while the thermal-magnetic trip unit delivers reliable performance across a range of load conditions. If your panels are Siemens-based and demand robust, three-phase protection for heavy loads, CMD63A800 is a compelling choice that pairs directly with compatible equipment for a cohesive, safer electrical distribution network.