Square D FB78 Circuit Breaker, 78A, 3-Pole, 600V

Introducing the Square D FB78 Circuit Breaker—a 78 A, 3-pole, 600 V protection solution crafted for demanding industrial environments. Designed for reliability in service, maintenance, and replacement projects, this FB78 unit delivers trusted Square D performance to safeguard your equipment and personnel in everyday operations and during upgrades.

• Manufacturer: Square D
• Part Number: FB78
• Product Type: Circuit Breaker
• Amperage: 78 A
• Poles: 3
• Voltage: 600 V

Designed for industrial service, maintenance, and replacement

Perfect for industrial electrical service, this three-pole breaker is suited for panels, switchgear, and distribution systems where three-phase protection is essential. It supports routine maintenance and straightforward replacement when upgrading or refurbishing existing installations, ensuring minimal downtime and dependable circuit protection.

Compatibility and fit

Compatibility check: Verify fit by part number and application requirements. The correct and intended part number is FB78, and confirming that your equipment, panelboard, or switchgear accepts this 3-pole 600 V breaker is essential before purchase. If you need help matching a part number or confirming compatibility, message us and we'll help.

Practical use cases

• Replacing a failed or obsolescent breaker in industrial panels or switchgear
• Upgrading legacy systems to a 600 V, three-phase protection scheme
• Incorporating a reliable 78 A breaker into new or refurbished distribution networks

Why this FB78 stands out

• Three-pole configuration provides synchronized protection across all phases in a 3-phase system
• Robust 600 V rating supports medium-to-high voltage industrial circuits with steady performance
• Trusted Square D design offers familiarity and compatibility with existing Square D components in your infrastructure

Practical tips for deployment: ensure the system is de-energized before replacing any breaker, confirm exact compatibility with your panel or switchgear using the FB78 part number, and maintain a spare on hand for planned maintenance windows. If you’re unsure about compatibility or fit, reach out—we’re ready to assist with part-number validation and application-specific guidance.