Siemens CND63S120 A - 1200 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens CND63S120A is a 1200A, 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 handle demanding electrical environments, it delivers reliable performance when protection and stability matter most. Key features that set this breaker apart - Secure bolt-on mounting for a rigid, vibration-resistant bus connection that stays tight through even the roughest installations. - Thermal-magnetic trip unit provides stable, repeatable protection by continuously sensing both overload and short-circuit conditions. - Designed to be compatible with matching OEM load centers and panelboards, simplifying replacement and upgrade projects. - Versatile for residential, commercial, and light industrial applications where robust protection and durable construction are essential. Technical specifications at a glance

• Manufacturer: Siemens
• Part Number: CND63S120A
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 1200A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases and practical benefits - Panel upgrades and new installations: Mounts securely with a bolt-on design to create a dependable, vibration-resistant bus connection in panelboards and load centers. - High-current circuits: The 1200A rating supports sizable branch circuits common in commercial spaces and light industrial facilities, providing robust protection without compromising speed or accuracy. - Maintenance-friendly replacements: Compatibility with OEM panels means smoother swaps and fewer compatibility concerns during service work or upgrades. - Long-term reliability in variable environments: The thermal-magnetic protection works consistently across temperature fluctuations and electrical noise, helping prevent nuisance trips while guarding against dangerous faults. Why this breaker matters for your electrical system Choosing the Siemens CND63S120A means prioritizing secure mechanical integrity, precise protection, and seamless compatibility with established panelboard ecosystems. Its bolt-on design reduces the risk of bus connection loosening in environments subject to vibration, while the thermal-magnetic trip curve delivers predictable, repeatable performance when protection is critical. For installers and facility managers aiming to safeguard high-current circuits with reliable, industry-standard components, this 3-pole molded case breaker is a practical, future-ready choice.