Siemens K3B100 100A 3-Pole 600 V Circuit Breaker

Siemens K3B100 is a reliable three‑pole circuit breaker engineered to protect three‑phase electrical systems up to 600 V. With a 100 A rating, it provides dependable overcurrent protection for industrial and commercial panelboards, helping keep equipment safe and downtime to a minimum.

• Three‑pole configuration delivers balanced protection across all phases in three‑phase networks.
• 100 A current rating protects feeders and distribution circuits from overloads while supporting robust startup and operation of connected equipment.
• 600 V voltage rating suitable for a wide range of industrial and commercial applications, including distribution panels and feeder lines.
• Part Number K3B100 ensures straightforward identification, ordering, and compatibility within Siemens systems and spare‑parts inventories.
• Trusted Siemens reliability with a design philosophy built around consistent performance, ease replacement, and long‑term support in demanding environments.

This breaker is an excellent choice for three‑phase distribution and protection in service panels, equipment racks, and industrial control solutions. It helps maintenance teams streamline repairs and replacements, thanks to its standardized form factor and clear Siemens lineage.

Ideal for: electrical contractors, facility managers, panel builders, and maintenance crews working with Siemens‑based installations that require dependable 3‑pole protection at up to 600 V.

Use cases and scenarios include stocking a ready replacement for Siemens‑driven installations, upgrading legacy panels to maintain consistent protection across three phases, and provisioning spare parts for service fleets in manufacturing, processing, and infrastructure environments.

Installation and considerations ensure the 600 V rating matches your system, and that the breaker aligns with your Siemens panel or distribution setup. Always follow local electrical codes and the manufacturer’s installation guidelines when integrating this device into an active system.

Technical specifications

• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Part Number: K3B100
• Brand: Siemens