Siemens MD63B700 - 700 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Siemens MD63B700 is a robust 700A, 600V, 3-pole molded case circuit breaker designed to safeguard branch circuits in panelboards and loadcenters. Built for dependable overcurrent and short-circuit protection, it delivers reliable protection where it matters most in residential, commercial, and light industrial settings.

Designed to maximize panel space without sacrificing protection, this compact molded case breaker fits neatly into crowded electrical enclosures. Its thermal-magnetic trip unit delivers stable, repeatable protection performance, providing fast instantaneous trips for fault conditions while minimizing nuisance tripping during normal operation.

• Three-pole protection for 3‑phase systems: ideal for panelboards and loadcenters that run on balanced three‑phase power common in commercial and light industrial environments.
• 700A, 600V ratings: supports heavy branch circuits and large feeders, allowing you to protect high-demand equipment without compromising safety.
• Space-efficient molded case design: preserves panel density and simplifies wiring management in compact installations.
• Thermal-magnetic trip unit: provides precise protection characteristics with reliable coordination across varying loads and fault conditions.
• OEM loadcenter compatibility: engineered to work seamlessly with Siemens matching loadcenters and panelboards for straightforward replacement or upgrade.

Use cases span protecting main feeders in commercial panelboards, safeguarding large branch circuits in light industrial applications, and upgrading residential service panels where higher current protection is required without expanding panel footprint. The MD63B700 is a purpose-built solution for reliable, long-term electrical protection that aligns with Siemens loadcenter ecosystems, ensuring consistent trip performance and easier maintenance over time.

Technical specifications at a glance:

• Manufacturer: Siemens
• Part Number: MD63B700
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 700 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the Siemens MD63B700 means selecting a trusted, purpose-built solution for high-current, three‑phase protection that integrates smoothly with compatible Siemens panels. It’s a thoughtful upgrade for panels dealing with demanding loads, delivering clear protection advantages, simplified maintenance, and coordinated performance across your electrical distribution system.