Westhinghouse FB3040 - 40A, 3-Pole, Circuit Breaker

The Westhinghouse FB3040 is a sturdy 40A, 3-Pole circuit breaker engineered for demanding electrical environments. Designed to deliver dependable overcurrent protection, it suits industrial, commercial, and OEM applications where safe, reliable operation in distribution panels and motor control centers is non‑negotiable.

Why the FB3040 stands out

• Three‑pole design for 3‑phase systems: Protects all three lines in a three‑phase circuit, ensuring balanced protection and coordinated tripping when faults occur.
• 40‑amp rating: Perfect for mid‑sized motor loads, feeders, and distribution circuits where precise current limiting is required.
• Versatile mounting for panel environments: Optimized for panelboards, switchboards, and control panels, making it a flexible choice for retrofit or new builds.
• Industrial‑grade reliability: Built to perform in environments where dependable protection and safe operation are critical.
• OEM-friendly option: Suitable for original equipment manufacturers seeking a trusted, high‑performing protection device.

Ideal applications and use cases

Use the FB3040 in distribution panels and motor control centers where three‑phase power is standard. It’s well suited for:

• Industrial machinery drives and conveyors requiring balanced protection across all phases
• Commercial power distribution feeders in mechanical rooms and service bays
• OEM equipment panels where a compact, reliable 40A trip device is needed
• Control panels that manage multi‑phase circuits for pumps, fans, and processing equipment

What this means for you

Choosing the FB3040 translates to fewer fault events, faster isolation of problems, and minimized risk to downstream equipment. The three‑pole configuration delivers synchronized protection across all phases, helping prevent phase imbalances that can lead to motor overheating or wiring damage. In daily operation, you’ll benefit from straightforward maintenance, predictable performance, and compatibility with standard panel architectures.

Practical guidance for deployment

• Verify your system is a three‑phase setup and that a 40A protection level aligns with your load calculations.
• Install in panelboards, switchboards, or control panels where a compact, integrated overcurrent device fits the space and wiring layout.
• Consult your electrical schematic to ensure proper alignment with feeder circuits and motor control logic.
• Regularly inspect mounting, terminal connections, and surrounding enclosure conditions to maintain reliable operation.