Siemens | NEG3B040L | Circuit Breaker | 3-Pole | 600V | Feed-Through

Meet the Siemens NEG3B040L Circuit Breaker—the dependable three-pole protection solution designed for demanding 600V electrical systems. This feed-through model is built for maintenance, retrofit, and replacement scenarios, delivering seamless integration with existing Siemens panels and workflows.

Key specifications

• Poles: 3-Pole
• Voltage: 600V
• Configuration: Feed-Through
• Part number: NEG3B040L
• Compatibility note: Best reference for compatibility is the part number NEG3B040L; confirm fit and ratings before ordering.

What makes this model unique

• Designed to integrate smoothly within Siemens system architectures, minimizing retrofit complexity and downtime.
• Feed-through configuration offers straightforward wiring alignment in compatible panels, simplifying expansion or replacement work.
• Three-pole protection ensures balanced handling of multi-phase 600V circuits in industrial environments, supporting reliable, continuous operation.

Ideal use cases

Perfect for service and upgrade projects that require a precise 3-Pole, 600V feed-through breaker within Siemens-based installations. Replacement in panels that rely on NEG-series compatibility and maintenance in manufacturing lines, process control cabinets, or equipment rooms where robust overcurrent protection is essential.

How to verify compatibility

Before ordering, confirm fit and ratings using the part number NEG3B040L as the primary reference. This ensures the breaker matches your panel’s acceptance criteria and your system’s voltage and pole requirements.