Westinghouse QNP3040 Circuit Breaker, 40A, 3-Pole, 240V

The Westinghouse QNP3040 Circuit Breaker is built for demanding industrial service, maintenance, and replacement projects. With a 40-amp rating, a 3-pole design, and 240-volt operation, this breaker delivers dependable overcurrent protection precisely where it’s needed in commercial and industrial electrical systems.

Why the Westinghouse QNP3040 stands out

• 40 A, 3-Pole, 240V configuration — specifically suited for 240-volt, multi-line circuits that require reliable 3-pole protection in industrial panels.
• Part number clarity — the exact match for compatibility checks, ensuring you’re selecting the right device for your application.
• Industrial-grade protection — designed to perform in the demanding environments of service, maintenance, and replacement work where downtime matters.
• Compatible with Westinghouse panels and gear — a practical choice when you’re aligning with an existing Westinghouse electrical ecosystem.

What problems it solves

• Prevents damage from overcurrent on 240V circuits by providing reliable trip protection across three conductors.
• Streamlines maintenance and replacement work with a clearly identifiable part number (QNP3040) for quick compatibility checks.
• Reduces downtime in industrial environments by offering a dependable, ready-to-install solution that fits established Westinghouse systems.

Ideal use cases

• Replacing worn or tripped breakers in 240V, 3-pole distribution panels.
• Initiating new installations in industrial facilities where Westinghouse-compatible protection is required.
• Maintenance projects that call for a dependable, drop-in replacement part with a verified part number.

Compatibility and installation tips

Always verify the fit by part number and application requirements before purchasing. If you’re unsure about compatibility, send us a message and we’ll help confirm whether the QNP3040 is the right match for your panel or equipment. When installing, ensure the electrical system is de-energized and handled by qualified personnel following all safety protocols.

How this compares to alternative solutions

For environments already configured around Westinghouse components, the QNP3040 provides a streamlined, reliable option that aligns with existing panels and wiring practices. Its three-pole, 240V setup is tailored for industrial applications where stable, consistent protection is essential, helping you avoid mismatches that can cause nuisance trips or compatibility issues with generic replacements.

Keep a dependable spare on hand and rely on the part-number-based fit confirmation to minimize guesswork during critical maintenance windows. If you need help matching a part or confirming compatibility, we’re ready to assist.