Siemens | EF3B100 | Circuit Breaker | 100A | 3-Pole | 600V | 14kA | Bolt-On

When you need reliable, category-leading protection for 3‑phase 600V systems, the Siemens EF3B100 circuit breaker is engineered to perform. This 100A, 3‑pole, bolt‑on model delivers precise overcurrent protection with a robust build, making it an ideal choice for maintenance, retrofit, and replacement projects where exact specifications matter.

Key specifications

• Amperage: 100A
• Poles: 3‑Pole
• Voltage rating: 600V
• Interrupting capacity: 14kA
• Mounting: Bolt‑On
• Part number: EF3B100

Why choose the Siemens EF3B100?

The EF3B100 brings a deliberate, purpose-built design to industrial and commercial panels. The 3‑pole configuration ensures simultaneous disconnection across all phases, improving safety and reducing the risk of backfeeds in three‑phase circuits. Its bolt‑on mounting simplifies installation in compatible enclosures, enabling quicker maintenance or fault‑finding during downtime. With a 14kA interrupting capacity at 600V, this breaker is built to handle substantial fault currents typical of demanding electrical environments, giving you dependable protection when it matters most.

Ideal use cases

• Retrofit projects where a 100A, 3‑pole, 600V breaker is required to upgrade existing panels.
• Maintenance replacements in Siemens-equipped or compatible 3‑phase distribution systems.
• Spare part in maintenance inventories for critical infrastructure that operates at 600V.
• New installations that demand a bolt‑on, three‑pole protection device with a clear, predictable trip profile.

Installation and compatibility tips

Before ordering, confirm fit and ratings using the EF3B100 part number as the best reference for compatibility. This bolt‑on design is meant for panels that accommodate Siemens 3‑pole breakers with the same footprint and mounting style. When installing, ensure the power is fully shut off, and follow standard electrical safety practices. For best results, pair with a panel that matches the 600V operating requirement and 14kA fault current expectation of this device.