Schneider Electric FJA140403 40A 1-Pole 277 V Circuit Breaker Potential Transformer

Schneider Electric FJA140403 is a dependable 40 A, 1-pole circuit breaker built for 277 V electrical systems. This circuit breaker potential transformer variant is designed to protect feeders and branch circuits from overloads and short circuits, helping maintain uptime in commercial environments where 277 V distribution is common. It’s engineered to integrate with metering and monitoring workflows, providing a measurement-ready protection solution.

With this 277 V circuit breaker, you get predictable trip performance, straightforward compatibility with Schneider Electric panels, and a compact design that fits standard distribution setups. The FJA140403 is a practical choice for facilities managers, electrical contractors, and engineers who prioritize reliability and easy asset replacement in busy commercial spaces.

Key specifications

• Current rating: 40 A
• Poles: 1
• Voltage rating: 277 V
• Part number: FJA140403

Why this circuit breaker stands out

• Optimized for 277 V systems common in commercial buildings, making it ideal for protecting lighting feeders and general-purpose circuits.
• Single-pole design delivers targeted protection while minimizing panel footprint where space matters.
• Backed by Schneider Electric’s trusted protection lineage, ensuring seamless compatibility with existing panels and replacement parts within the same ecosystem.
• Designed for straightforward installation and maintenance, reducing downtime during replacements or upgrades.

Best-use scenarios

Ideal for offices, retail spaces, schools, and facilities with 277 V distribution. Use it to protect lighting circuits, power feeds to small equipment, or as part of a broader protection strategy in electrical rooms. If your system operates at 277 V and you need a reliable, 40 A, single-pole protective device, the FJA140403 provides a proven solution that aligns with Schneider Electric’s standards and supports metering-related workflows through its potential-transformer capability.