Siemens | E43B100 | Circuit Breaker | 3-Pole

Siemens E43B100 3-Pole Circuit Breaker delivers reliable, precise protection for three-phase electrical systems. This 3-pole unit is engineered to align with Siemens specifications, making it an ideal choice for maintenance, retrofit, or replacement tasks where exact compatibility matters.

• Exact compatibility: Built around the E43B100 designation to ensure proper fit within compatible Siemens panels and assemblies.
• Three-pole design: Supports three-phase circuits, providing synchronized protection across all live conductors for motors and equipment common in commercial and industrial settings.
• Versatile application: Specifically suitable for maintenance, retrofit, and replacement projects where matching specs are required.
• Clear verification steps: Before ordering, confirm your panel model, required voltage, amperage, and trip characteristics to ensure a perfect match.
• Quality you can rely on: Siemens build quality designed for dependable performance in demanding environments and ongoing operations.

This 3-Pole circuit breaker is an excellent choice for facilities upgrading to compatible Siemens components or maintaining a ready-to-install spare for critical services. The 3-pole configuration simplifies wiring and ensures balanced protection across three phases, reducing the risk of phase-related issues and equipment damage.

Real-world use cases

• Maintenance swaps: Fast, field-ready replacement to minimize downtime during service windows.
• Retrofits: Aligns with existing three-phase Siemens systems to preserve protective coordination and performance.
• New installations: Suitable for panels that require a Siemens 3-pole breaker with matching specifications.

Compatibility reminder: The part number (E43B100) is the best reference for compatibility. Always verify the fit and ratings against your panel documentation or Siemens support resources before purchase.