Siemens NMX3B800L - 800 A, 3-Pole Circuit Breaker | AmpState

Siemens NMX3B800L is built to safeguard high-demand branch circuits with precision and reliability. This 800A, 3-pole molded case circuit breaker is designed for use in panelboards and loadcenters where dependable overcurrent and short-circuit protection is non-negotiable. Its compact footprint frees panel space while delivering robust performance when it matters most. Key features that set the NMX3B800L apart - Efficient, space-saving design: The molded case construction packs heavy duty protection into a compact form, enabling denser panel configurations and simpler wiring layouts without compromising safety. - Thermal-magnetic protection with repeatable accuracy: The dual-action trip unit combines long-time thermal sensing with instantaneous magnetic response to quickly interrupt dangerous fault currents, maintaining consistent protection across varying temperatures and supply conditions. - Seamless compatibility with Siemens and OEM panel systems: Specifically engineered to work with matching Siemens loadcenters and compatible OEM panelboards, ensuring a reliable fit and predictable electrical performance. - Ready for residential, commercial, and light industrial use: Whether upgrading a home service panel, a commercial distribution board, or a light-industrial installation, this 3-pole breaker provides robust branch-circuit protection for demanding environments. Why this breaker matters for your electrical system - Protects both wiring and devices: By quickly disconnecting power during short circuits and overloads, it minimizes damage to cables, equipment, and downstream components. - Maintains system stability under fault conditions: The thermal-magnetic mechanism responds to overloads with a controlled, repeatable trip profile, reducing nuisance tripping while preserving essential protection during faults. - Scales with high-demand applications: The 800A rating is ideal for feeder protection in larger panels or service entrances where substantial load is present, helping you consolidate protection without juggling multiple devices. Ideal use cases and scenarios - Upgrading a residential main distribution panel to support higher load centers while preserving safety margins. - Protecting feeders in commercial panels that serve HVAC systems, lighting networks, and receptacle circuits in office environments. - Providing dependable protection in light industrial panels where compact size and strong interruption capability are crucial. What you gain with the Siemens NMX3B800L - Proven Siemens engineering for consistency and long-term reliability in critical electrical infrastructure. - A trusted, OEM-compatible solution that aligns with standard panelboard configurations and wiring practices. - Clear, predictable protection performance that operators and maintenance teams can rely on for routine service and safety reviews. Technical snapshot - Amperage Rating: 800A - Poles: 3 - Type: Thermal-magnetic molded case circuit breaker - Application: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters In practice, the NMX3B800L simplifies panel design and maintenance by delivering strong, predictable protection in a compact form factor. It’s a purpose-built choice for professionals who demand dependable safety, clear electrical performance, and seamless compatibility with Siemens systems and compatible panel architectures.