Siemens HMX3B700L - 700 A, 3-Pole Circuit Breaker | AmpState

Siemens HMX3B700L is a 700A, 3-pole molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for demanding electrical environments, it combines a compact form factor with precise protection so you can design safer, more efficient power distributions.

Compact, space‑efficient protection

- The molded case design trades bulky hardware for a smaller footprint, freeing valuable panel space for wiring organization and easier maintenance. - Streamlined integration with matching OEM loadcenters and panelboards ensures a clean, reliable installation with fewer compatibility concerns.

Stable, repeatable protection you can trust

- A thermal-magnetic trip unit provides dependable response across a wide range of operating temperatures, delivering consistent protection against overloads and short circuits. - The 3-pole configuration is ideal for balanced three-phase circuits, helping you maintain system stability and protective coordination in commercial and light industrial applications.

Why this model stands out

- High-current capability: Rated at 700A, it is tailored for feeders and main distribution paths in panels where robust protection is essential. - OEM-compatible design: Engineered to pair with Siemens and compatible OEM loadcenters and panelboards, reducing retrofit complexity and enhancing reliability. - Versatile application: Suitable for residential, commercial, and light industrial environments where dependable branch-circuit protection is a must.

Technical snapshot

• Manufacturer: Siemens
• Part Number: HMX3B700L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 700A
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

- Upgrading or expanding panelboards in commercial spaces with high-current feeders. - Subpanel installations in office buildings, retail centers, or light industrial facilities where reliable 3-phase protection is required. - New construction projects that require compact, space-efficient protection without sacrificing safety margins.

Installation and practical tips

- Verify compatibility with your existing or planned panelboard lineup by matching the OEM specification; HMX3B700L is designed to integrate smoothly with matching Siemens and compatible OEM loadcenters. - Plan for routine inspection of the trip unit and conductors during commissioning to ensure clean electrical connections and stable protection performance. - Consider coordination with upstream protective devices to achieve selective tripping and minimize downtime during faults. Siemens HMX3B700L offers a concrete, high-current protection solution that respects panel space, delivers reliable trip performance, and fits neatly into compatible loadcenters and panelboards. It’s the practical choice for professionals who need durable, area-efficient three-pole protection for demanding electrical systems.