Eaton FAZ-B40/3 40A 3-Pole 480 V Circuit Breaker

The Eaton FAZ-B40/3 is a robust 3-pole circuit breaker designed for reliable overcurrent protection in demanding 3-phase power systems. Rated at 40 A and configured for up to 480 V, this unit safeguards industrial equipment and distribution networks where uptime matters.

Three-pole protection ensures all phases disconnect together during a fault, minimizing arc energy and helping protect downstream machinery, wiring, and panels. The FAZ-B40/3 is a compact, modular solution that fits standard industrial switchgear and distribution panels, simplifying upgrades or panel replacements in 480 V networks.

Key specifications

• Current rating: 40 A
• Poles: 3
• Voltage rating: 480 V
• Part number: FAZ-B40/3

Why this 3-pole solution stands out

• Balanced phase protection: With a true three-phase disconnect, it maintains system stability and reduces the risk of neutral or ground faults propagating through a panel.
• Suitable for 480 V distributions: Ideal for mid-range industrial circuits and motor-driven equipment in manufacturing, HVAC, or data-center infrastructure.
• Modular compatibility: Designed to integrate with standard bus bars and enclosures found in common industrial panels, streamlining retrofits and upgrades.
• Clear fault response: In the event of an overload or short, the breaker isolates the circuit, helping minimize downtime and protect connected equipment.

Ideal use cases

• Manufacturing lines and assembly automation powered by 3-phase 480 V supply.
• Industrial HVAC systems with multiple motor loads.
• Data centers and critical facilities requiring reliable 3-phase distribution protection.
• Power distribution panels, switchgear, and control cabinets in warehouses and facilities.

Practical installation tips

• Verify that the hosting panel or switchgear supports a 3-pole, 480 V device in the FAZ family and that wiring gauge and conductor insulation are appropriate for 40 A service.
• Follow standard safety practices when wiring line and load connections and ensure proper alignment with the panel’s bus bars.
• Regularly inspect tripped indicators and perform periodic testing or replacement in accordance with maintenance schedules.