Siemens | FJ3B110 | Circuit Breaker | 110A | 3-Pole | 600V | 14kA | Bolt-On

The Siemens FJ3B110 circuit breaker is a purpose-built protection device designed for demanding industrial panels where reliable, precise protection matters. This 3-pole unit delivers solid protection for 3-phase systems up to 600 V, with a robust 14 kA interrupting capacity. Built for bolt-on installation, it’s engineered to simplify field retrofits, maintenance, and replacements that require exact specifications.

Key specifications

• Amperage: 110 A
• Poles: 3-Pole
• Voltage: 600 V
• Interrupting capacity: 14 kA
• Mounting: Bolt-On

Why this 3-pole, 110 A breaker fits your retrofit or maintenance project

• Exact match for existing Siemens installations where FJ3B110 is specified, ensuring seamless replacement without reworking panel layouts.
• Bolt-on mounting provides secure, vibration-resistant installation and faster serviceability when swapping or upgrading protection in the field.
• High interrupting rating (14 kA) offers confidence in handling short-circuit events typical of industrial feeders and motors.
• 600 V rating covers a wide range of commercial and light industrial distribution applications, from control circuits to power feeders.
• Designed for maintenance, retrofit, and replacement scenarios where matching specs is critical, reducing commissioning time and risk.

Ideal use scenarios

Use the FJ3B110 when you need a reliable drop-in protection solution for 3-phase circuits in industrial switchgear, panel boards, or motor control centers. It’s well-suited for:

• Replacing worn or outdated breakers in Siemens-based systems
• Upgrading protection in retrofit projects where unchanged amperage and voltage ratings are required
• New installations that must align with existing Siemens FJ-series footprints and mounting philosophies

Installation and compatibility tips

Before ordering, confirm fit and ratings directly against your equipment’s documentation. The part number FJ3B110 is the most reliable reference for compatibility with Siemens gear. Ensure your panel or switchgear accepts bolt-on breakers and that the 110 A, 600 V, and 14 kA specifications align with your protection scheme and upstream devices.

What sets this Siemens breaker apart

• Genuine Siemens component engineered for field reliability and long service life in industrial environments
• Clear, unambiguous spec alignment for trouble-free maintenance, retrofits, and replacements
• Bolt-on design reduces installation complexity, improves mechanical stability, and speeds up future servicing

If you’re planning a maintenance cycle, retrofit, or replacement in a Siemens-powered system, the FJ3B110 delivers the exact protection you need—and the confidence that comes with a proven industrial solution. Always verify fit and ratings against your specific panel model to ensure optimal performance and safety.