General Electric SG400F 400A 3-Pole 480 V Circuit Breaker

General Electric SG400F 400A 3-Pole 480 V Circuit Breaker is a robust, industrial-grade solution designed to protect large three-phase electrical systems. Built for reliability in demanding environments, this GE breaker delivers precise overcurrent protection to safeguard equipment, wiring, and personnel in 480 V networks.

Key specifications

• Current rating: 400 A
• Poles: 3
• Voltage rating: 480 V
• Part number: SG400F

Why the 3-pole, 480 V design matters

In three-phase power distribution, balanced protection across all phases is crucial. The SG400F’s three-pole construction ensures simultaneous interruption of faults in every leg, reducing the risk of uneven loads, equipment damage, or fire hazards. Its 480 V rating makes it a natural fit for industrial and commercial environments where high-voltage three-phase power is the norm.

Ideal use cases

• Industrial facilities with large 3-phase feeders, such as manufacturing lines and process plants
• Commercial or data center distribution rooms requiring dependable 400 A protection
• Main or sub-panel protection for 480 V electrical systems in heavy-duty applications

What problems it solves

• Prevents damage from overloads and short circuits by interrupting fault currents quickly
• Minimizes downtime and maintenance costs by protecting critical feeders
• Provides reliable, predictable tripping behavior in demanding 480 V environments

Practical considerations

When selecting this breaker, confirm that your installation environment supports a 3-pole, 480 V configuration and that the panel or distribution system is designed to accommodate a 400 A protection device. For installation, rely on a qualified electrical professional to ensure proper mounting, secure connections, and compliance with local electrical codes.

Upgrade or stock the General Electric SG400F 400A 3-Pole 480 V Circuit Breaker for dependable, phased protection in high-capacity 480 V systems. It blends durable GE engineering with clear, decisive fault interruption to keep power systems resilient under load and fault conditions.