NA340 | Circuit Breaker | 40A | 3-Pole | 240V

Introducing the NA340: a rugged industrial circuit breaker built for reliability in demanding environments. With a precise 40A rating, a 3-pole footprint, and 240V operation, this unit is designed for maintenance, retrofit, and replacement projects where exact specifications matter. When your panel or equipment calls for the NA340, you get a dependable, straightforward solution that minimizes downtime and confirms ongoing protection for your electrical system.

Why the NA340 stands out

• 40A protection tailored for 240V circuit protection in industrial settings.
• 3-Pole design consolidates protection across all three conductors in a single device, simplifying wiring and maintenance.
• Direct-match replacement when your system specifies the NA340—reducing guesswork and compatibility issues.
• Industrial-grade reliability purpose-built for maintenance, retrofit, and replacement tasks in demanding environments.

Key specifications at a glance

• Amperage: 40A
• Poles: 3-Pole
• Voltage: 240V

Compatibility and fit — Confirm fit and ratings before ordering. The part number NA340 is the most reliable reference for compatibility with your panel or equipment, ensuring a seamless installation and reliable protection.

Ideal use cases

• Maintenance projects where an aging or failed 3-pole 240V breaker needs replacement.
• Retrofit initiatives upgrading electrical systems to 240V with a 3-pole protection strategy.
• Replacement scenarios in industrial panels that specify the NA340 as the correct part number.
• Spare-part readiness for facilities that emphasize quick downtime recovery and consistent protection.

Practical guidance for installation and care

• Before handling, shut down power and verify zero voltage to avoid risk during replacement.
• Ensure the mounting and bus-bar configuration matches a 3-Pole 240V setup for proper seating and operation.
• Keep the NA340 in the spare parts kit, noting the exact part number for future maintenance or replacements.