Siemens CMD63H800 - 800 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens CMD63H800 is a high-capacity, three-pole bolt-on molded case circuit breaker designed to guard your electrical distribution with precision. Built for dependable branch circuit overcurrent and short-circuit protection, it thrives in panelboards and loadcenters where reliability matters most—from home service upgrades to commercial equipment rooms and light industrial setups.

Why this CMD63H800 stands out

• Secure bolt-on mounting provides a rigid, vibration‑resistant bus connection, helping prevent loosening and maintain consistent electrical performance in demanding environments.
• Thermal-magnetic trip unit delivers stable, repeatable protection by sensing both heat and instantaneous magnetic faults, reducing nuisance trips and ensuring fast response during a short‑circuit event.
• OEM-compatible design is engineered to work with matching Siemens load centers and panelboards, enabling straightforward integration and reliable system-wide protection.
• Versatile application suitable for residential, commercial, and light industrial installations that require robust protection for high-current circuits.

Technical at a glance

• Manufacturer: Siemens
• Part Number: CMD63H800
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage Rating: 800A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use the CMD63H800 when you need robust protection for high-current feeders in panelboards and loadcenters. It’s well-suited for upgrading older installations, replacing worn components in commercial panels, or configuring new three-phase distributions in light industrial settings. Its bolt-on design simplifies secure mounting in compatible Siemens environments, while the thermal-magnetic trip ensures dependable protection against both gradual overloads and sudden faults.

Practical guidance for deployment

• Pair this 3-pole bolton MCCB with Siemens OEM panelboards and loadcenters designed for the CMD63H800 family to ensure optimal electrical contact and protection harmony.
• Plan for high-current applications where stable protection is critical—this 800A device is built to handle demanding branch circuits with confidence.
• Follow standard electrical safety practices during installation, including proper secure mounting and adherence to your panelboard’s rated specifications.
• Use as part of a comprehensive protection strategy that combines reliable fault detection with clear maintenance plans to minimize downtime.

With the Siemens CMD63H800, you’re choosing a rugged, purpose-built solution for reliable three-phase circuit protection in modern electrical systems. It’s engineered to deliver consistent trip performance, rapid fault response, and seamless compatibility where serious power management matters.