Siemens | FJ3B080 | Circuit Breaker | 80A | 3-Pole | 600V | Bolt-On

Siemens FJ3B080 Circuit Breaker — an 80A, 3-Pole, 600V bolt-on protection device designed for demanding electrical installations. Built for maintenance, retrofit, and replacement projects where exact specifications matter, this breaker delivers reliable, plug-and-play compatibility with Siemens panels and gear.

Key specifications

• Amperage: 80 A
• Poles: 3-Pole
• Voltage rating: 600 V
• Mounting: Bolt-On

What makes this breaker stand out

Designed to pair precisely with Siemens equipment, the FJ3B080 is built for secure, durable installation thanks to its bolt-on mounting. This configuration provides a robust physical connection in larger panels and feeders, helping to maintain reliable circuit protection in demanding environments. The combination of a high-current 80 A rating with a 600 V capability makes it a practical choice for industrial control circuits, commercial feeders, and motor-related applications where strong overcurrent protection is essential.

Ideal use cases

• Maintenance and retrofit projects where exact specifications are required
• Replacement of older or failed breakers in Siemens-equipped panels
• Industrial motor circuits and large feeders needing 80 A protection
• 3-Pole, 600V applications in commercial or light industrial electrical systems

Compatibility and installation notes

Important: Confirm fit and ratings before ordering. The part number is the best reference for compatibility. Specifically, use Siemens FJ3B080 to match the intended 80A, 3-Pole, 600V, bolt-on configuration.

Practical tips for installation

Before installation, ensure the power is fully de-energized and follow local electrical codes. Verify that the enclosure supports bolt-on mounting and that the panel labeling corresponds to a 3-pole, 600V device. Keeping the line and load terminals clean and tightly torqued helps ensure a solid, long-lasting connection in high-current environments.