Square D FA34045G 45A 3-Pole 480 V Circuit Breaker

Powerful protection for industrial-grade electrical systems, the Square D FA34045G is a 45 A, 3-pole, 480 V circuit breaker designed to guard three-phase feeders against overloads and short circuits. Built for reliability in demanding environments, it helps keep motors and heavy equipment running smoothly while reducing the risk of costly downtime.

Key specifications

• Part Number: FA34045G
• Current rating: 45 A
• Poles: 3
• Voltage rating: 480 V
• Brand: Square D

Why choose the FA34045G

In high-voltage, three-phase setups, this 3-pole breaker ensures all phases disconnect together, reducing the risk of phase imbalance and equipment damage. The 45-amp rating makes it ideal for protecting motor circuits, feeders, and heavy loads commonly found in manufacturing facilities, data centers, and large-scale HVAC installations.

Ideal applications

• Three-phase motors and drives in manufacturing and processing facilities
• Industrial feeders powering distribution panels with 480V service
• Heavy equipment circuits where reliable overload protection is critical

What problems it solves

By interrupting current on overload or fault conditions across all three phases, the FA34045G minimizes equipment wear, prevents insulation damage, and helps ensure safety standards are met in high-voltage environments.

Installation and safety notes

• Designed for use in compatible Square D distribution panels that accept FA-series breakers
• Install by a qualified electrician following local electrical codes and panel manufacturer guidelines
• Verify wiring and conductor sizing align with a 45 A protective device and 480 V system requirements

Tips for optimal use

• Keep a spare FA34045G on hand for rapid replacement in routine maintenance to minimize downtime
• Record trip history to anticipate preventive maintenance and prevent nuisance trips
• Store in a dry, clean environment and handle with care to preserve the integrity of the trip mechanism