Siemens | NNX3B800 | Circuit Breaker | 800A | 3-Pole | 600V

Siemens NNX3B800 Circuit Breaker delivers robust protection for high-current electrical installations. With an 800 A rating, a 3‑pole design, and 600 V capability, it’s built to handle demanding industrial and commercial power distributions. This unit is ideal for maintenance, retrofit, and replacement projects where precise specifications are required and Siemens reliability matters.

Key specifications

• Amperage: 800 A
• Poles: 3-Pole
• Voltage: 600 V
• Part reference: NNX3B800 — best reference for compatibility

Why choose the NNX3B800 for your system

Exact compatibility is anchored to the part number. By selecting NNX3B800, you streamline procurement and reduce the risk of mismatched ratings in critical protection schemes. The Siemens build behind this breaker supports reliable tripping performance under high-current conditions, helping you safeguard feeders, panels, and downstream equipment without unnecessary downtime or nuisance trips.

Use cases and ideal applications

Use this 800 A, 3‑pole, 600 V circuit breaker in facilities where heavy electrical loads rely on solid protection within switchgear and electrical panels. It’s well-suited for:

• Maintenance projects requiring an exact component replacement
• Retrofits to bring older installations up to current protection standards
• Replacement programs where uptime and compatibility are critical

Practical guidance

Before ordering, confirm fit and ratings to ensure a seamless match with your existing electrical infrastructure. The part number NNX3B800 is the most reliable reference for compatibility, so have it on hand during procurement.