Siemens NMG3F800 800A 3P 600V Circuit Breaker | AmpState

Rugged and dependable, the Siemens NMG3F800 800A 3P 600V Circuit Breaker is purpose-built for robust electrical protection in panelboards, load centers, and distribution gear. Its three-pole design makes it ideal for 3‑phase systems, delivering consistent performance across demanding industrial and commercial applications.

Key specifications at a glance

• Manufacturer: Siemens
• Part Number: NMG3F800
• Type: Circuit Breaker
• Amperage: 800 A
• Poles: 3
• Voltage: 600 V

Why choose this for your next project

Replacement-ready and designed to keep your BOM aligned with the original part number, the NMG3F800 is a precise fit for refurbishments and stocking spares. The 3‑pole configuration provides balanced protection across all three phases, helping to maintain reliable electrical distribution in complex panel assemblies and feeders.

Ideal use cases

• Panelboards and load centers in commercial buildings, manufacturing facilities, and other facilities with 3‑phase electrical systems.
• Retrofit and replacement projects where the original BOM specifies NMG3F800, minimizing engineering changes and downtime.
• Service fleets and maintenance inventories that require fast access to a trusted Siemens breaker for rapid restoration of power delivery.

How this breaker stands out

This Siemens unit isn’t a generic substitute—it’s a direct-fit, OEM-aligned protection device designed to match the performance and mounting characteristics of your existing equipment. Availability through AmpState makes sourcing straightforward, helping you keep projects on schedule and inventories accurate to the original design.

Support and compatibility

Need help confirming fit? Message AmpState and we’ll help you verify compatibility against your panel model and original BOM, ensuring you select the exact part your system was designed for and preserving electrical reliability.

Purchase with confidence from AmpState, where genuine Siemens NMG3F800 breakers are stocked for timely delivery to keep critical electrical distribution running smoothly.