Siemens | NNX3B100 | Circuit Breaker | 1000A | 3-Pole | 600V | 35kA

Meet the Siemens NNX3B100 Circuit Breaker—a purpose-built solution for high-demand electrical systems. With a 1000A rating, three poles, and a 600V maximum, it’s designed to protect large, multi-phase distributions in industrial settings. When faults occur, its 35kA interrupting capacity helps isolate the problem quickly, safeguarding equipment, wiring, and personnel while minimizing downtime.

Key specifications

• Amperage: 1000A
• Poles: 3-Pole
• Voltage: 600V
• Interrupting rating: 35kA
• Part number: NNX3B100

What sets this breaker apart

• The NNX3B100 is purpose-built to match Siemens systems, simplifying retrofit, maintenance, and replacement tasks.
• Clear reference for compatibility: The part number is your most reliable guide when confirming fit and ratings before ordering.
• High-current protection for demanding environments: 1000A capacity paired with a robust 35kA interrupting capability provides strong defense against fault currents in large feeders and main service paths.
• Three-phase protection: The 3-Pole design ensures synchronized switching across all phases, essential for balanced distribution and motor circuits.

Ideal use cases

• Industrial power distribution panels needing reliable high-current protection
• Retrofit projects where existing equipment requires an exact NNX3B100 match
• Maintenance and replacement of aging or non-Siemens components within Siemens-compatible assemblies
• Large motor feeder circuits and service entrances that require solid fault isolation

Fit, compatibility, and installation insights

Before ordering, verify that the NNX3B100 matches the intended panel or bus arrangement and that the 600V, 1000A, and 35kA ratings align with your system requirements. The part number is the strongest compatibility reference—use it to confirm that this breaker will drop into your Siemens-structured lineup without modification.

Practical guidance for getting the most from your breaker

• Plan replacements during preventive maintenance windows to minimize panel downtime.
• Cross-check with existing Siemens components in the same circuit to ensure consistent tripping characteristics and coordination.
• Keep a direct reference to the NNX3B100 part number handy for future service needs and quick procurement.