Siemens BEC4100 100A 4-Pole 480 V Circuit Breaker

The Siemens BEC4100 is a rugged, high-capacity protection device designed for demanding 480 V three‑phase power systems. Rated at 100 A with a 4‑pole configuration, it delivers reliable overcurrent protection for large distribution panels, switchgear, and industrial circuits. Part Number BEC4100, this breaker is built to integrate seamlessly into Siemens environments, ensuring consistent performance and straightforward replacement in compatible installations.

Key benefits

• 4-pole design for 3-phase at 480 V—central protection for multi‑phase circuits and the ability to reliably interrupt faults across all phases.
• 100 A current rating provides robust protection for feeders and branch circuits in commercial and industrial settings.
• Siemens compatibility—optimized to drop into Siemens panels and gear, simplifying maintenance and upgrades without aftermarket compatibility concerns.
• Consistent, predictable protection—engineered for dependable interruption during overloads and short circuits, helping minimize equipment damage and downtime.
• Durable, field‑reliable construction—designed to perform in tough electrical environments found in data centers, manufacturing floors, and large facilities.

Ideal use cases

• Upgrading or expanding 3‑phase distribution in industrial plants and manufacturing lines.
• Protection for large commercial electrical rooms and data center utility feeds.
• Replacements in Siemens panel boards where a 4‑pole, 480 V breaker is required.
• New installations where a trusted Siemens solution is preferred for system-wide compatibility.

How it solves real-world problems

In high‑voltage, three‑phase environments, overcurrent events can cause costly downtime and equipment damage. The Siemens BEC4100 delivers quick, reliable interruption at the source, protecting transformers, motors, and distribution feeders. Its 4‑pole architecture ensures all live conductors are protected in unison, reducing the risk of phase‑to‑phase faults propagating through the system. By matching Siemens standards and interfaces, it also simplifies future maintenance, parts availability, and panel retrofits.

What to consider when selecting

• System voltage and phase configuration: ensure 480 V, four‑pole protection aligns with your distribution topology.
• Service continuity needs: pair with other Siemens protective devices to create a cohesive, reliable protection scheme.
• Installation environment: verify panel compatibility and follow local electrical codes during replacement or installation.

Why choose the Siemens BEC4100

• Specific to Siemens ecosystems, reducing integration risk and maintenance complexity.
• 100 A rating tuned for mid‑to‑large feeders and critical loads in commercial and industrial facilities.
• Clear, consistent performance in 480 V power distribution applications—helping protect equipment and improve uptime.