Square D FC34040G 40A 3-Pole 480 V Circuit Breaker

The Square D FC34040G 40A 3-Pole 480 V Circuit Breaker is a dependable protection device designed for 3-phase electrical systems up to 480 volts. With a 40-amp rating and a three-pole configuration, it interrupts all three conductors simultaneously to safeguard motors, transformers, and feeders from overloads and short circuits.

Key specifications

• Current rating: 40 A
• Poles: 3
• Voltage rating: 480 V
• Part number: FC34040G

Why this matters for your system

Three-pole protection means balanced, comprehensive interrupting capability across all phases in a 480 V setup. This reduces the risk of uneven protection that can occur with smaller, single-pole devices and helps prevent damage to three-phase equipment during faults. The FC34040G is a straightforward, robust choice when you need reliable control and protection in industrial or commercial 480V environments.

Ideal use cases

• 3-phase motor feeders in 480 V systems, where consistent phase protection is essential for reliable startup and operation.
• Protection for 3-phase distribution circuits feeding transformers, pumps, compressors, and other heavy loads.
• Panel protection in industrial control spaces that require a compact, dependable 3-pole breaker with a clear 40 A limit.

Practical notes and best practices

For optimal performance, ensure the FC34040G is installed in a compatible enclosure designed for 3-pole breakers and that all connections are torqued to the manufacturer’s specifications. Use this breaker in appropriate 3-phase, 480 V environments to maximize safety and equipment longevity. When selecting protective devices, consider the specific load characteristics and trip requirements of your motors and feeders to align with your electrical design and safety standards.