Siemens CMD63B800 - 800 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens CMD63B800—a robust 3-pole bolt-on molded case circuit breaker designed to protect panelboards and load centers from overcurrent and short circuits. Rated at 800A and 600V, this unit is built to handle demanding residential, commercial, and light-industrial environments with consistent protection and dependable performance.

• Bolt-on mounting delivers a secure, vibration-resistant bus connection that stays solid through equipment vibration and temperature cycles.
• Thermal-magnetic trip unit provides stable, repeatable protection for both overloads and short circuits, reducing nuisance trips and safeguarding connected equipment.
• 3-pole design ideal for three-phase systems, designed to work with matching Siemens OEM load centers and panelboards for a seamless install.
• OEM compatibility ensures straightforward replacement and expansion within Siemens-compatible panel ecosystems, minimizing compatibility concerns.
• Versatile installation suitable for residential service panels, commercial distribution panels, and light-industrial downstream gear that require high-current protection.
• Durable molded-case construction built to withstand daily use in demanding electrical rooms and panel installations.

Technical snapshot

• Manufacturer: Siemens
• Part Number: CMD63B800
• 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

Use cases and practical scenarios

When you need reliable protection for a high-load, three-phase installation, the CMD63B800 shines. Use it to upgrade service panels to accommodate larger loads, protect motors and feeders in commercial or light-industrial panels, or add a solid, bolt-on solution in new builds where a rigid mounting connection reduces contact issues over time. Its compatibility with Siemens panel ecosystems makes it a practical choice for projects that require cohesive, long-term protection without aftermarket compatibility headaches.

Why choose the CMD63B800

This breaker combines a secure bolt-on design with a precise thermal-magnetic trip mechanism, delivering dependable protection while minimizing operational surprises. By matching Siemens OEM panel hardware, it simplifies installation, improves electrical integrity, and supports scalable protection as your system grows. For professionals prioritizing reliability, ease of installation, and cohesive system compatibility, the CMD63B800 is a purpose-built solution for safeguarding high-current, 3-phase circuits.