Siemens | EF3S100 | Circuit Breaker | 3-Pole | 600V

When protection matters most in industrial panels, the Siemens EF3S100 Circuit Breaker stands ready. This 3-pole, 600V unit is designed for maintenance, retrofit, and replacement projects where exact compatibility matters, delivering dependable interruption protection while you upgrade or service critical equipment.

Key specs at a glance

• Poles: 3-Pole
• Voltage rating: 600V
• Part number: EF3S100 — the best reference for compatibility

The EF3S100 is more than a drop-in replacement. It’s a precise Siemens match that preserves the original trip characteristics and physical footprint of your existing installation. By aligning with the exact part number, you reduce guesswork, minimize downtime, and maintain the reliability your equipment depends on.

Ideal use cases

• Maintenance and repair of industrial control panels that rely on 3-pole protection in 600V mains
• Retrofit projects where upgrading equipment requires a direct, compatible breaker
• Replacement for compatible Siemens-based installations to restore protected operation

Why choose this Siemens breaker for your project

• Direct compatibility through the EF3S100 part number reduces installation risk and mismatch
• Three-pole design provides synchronized protection across three live conductors in a 600V system
• Manufactured by Siemens, a trusted name in electrical protection with a consistent form factor

How to verify fit before purchase

Ensure your system requires a 3-pole, 600V breaker and that EF3S100 is the appropriate reference for your panel or OEM components. The part number is your most reliable guide for matching ratings and fit, helping you avoid incompatible replacements and supporting a smooth installation.