Siemens FJ3-B100 Circuit Breaker, 100A, 3-Pole, 600V

Meet the Siemens FJ3-B100 Circuit Breaker: a reliable, industrial-grade protective device designed to safeguard your 3‑phase power distribution. With a 100 A rating, a 3-pole configuration, and a 600 V operating capability, this breaker is built to stand up to demanding industrial service, maintenance, and replacement projects while keeping your equipment and team safe.

Key reasons to choose the FJ3-B100

• Exact compatibility ensured — verify fit by part number FJ3-B100 and align it with your application requirements to guarantee seamless integration.
• 3-Pole, 600V design — ideal for protecting 3‑phase circuits and motor controls in industrial environments, providing reliable protection across every phase of your system.
• Durable industrial construction — engineered to endure the rigors of maintenance and service scenarios, minimizing downtime and maintenance headaches.
• Siemens ecosystem alignment — designed to slot into Siemens panels and equipment, helping maintain consistent performance and ease of replacement.
• Support when you need it — if you’re unsure about compatibility, message us and we’ll help you match the part number to your specific application.

This circuit breaker is an excellent fit for facilities performing routine equipment service, panel upgrades, or component replacements. Use it to protect 3‑phase feeders, distribution circuits, and motor-driven loads where 600 V Class protection is required, ensuring a clear, maintainable path for fault isolation and safe shutdown.

Ideal for: maintenance teams, panel builders, and industrial facilities upgrading or stocking spare parts for Siemens-based electrical systems. It’s particularly well-suited for environments where quick, reliable replacement parts are essential to keep production lines moving and safety compliance intact.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: FJ3-B100
• Product Type: Circuit Breaker
• Amperage: 100 A
• Poles: 3
• Voltage: 600 V

Ready to secure your 3‑phase protection with a trusted Siemens component? Confirm compatibility by part number and application requirements, then add the FJ3-B100 to your order for a precise, reliable upgrade or replacement in your industrial electrical system.