NA3P45-FLAT-TOP | Circuit Breaker | 45A | 3-Pole | 240V

Designed for maintenance, retrofit, and replacement projects, the NA3P45-FLAT-TOP is a 45A, 3-Pole, 240V industrial circuit breaker built to protect three-phase electrical systems with precision and reliability.

Why this breaker stands out

Engineered for three-phase environments, this flat-top variant delivers balanced protection across all phases in 240V systems. Its form factor supports compatible enclosures where a neat, flush fit matters for both safety and panel aesthetics. While many replacements exist, the NA3P45-FLAT-TOP is specifically tailored to align with the NA3P family’s mounting and electrical characteristics, helping you maintain consistent trip behavior and panel configuration.

Key specifications

• Amperage: 45A
• Poles: 3-Pole
• Voltage: 240V
• Form factor: Flat-Top design for compatible enclosures
• Type: Industrial circuit breaker

Ideal use cases

• Retrofits for aging three-phase panels in manufacturing floors, data centers, and processing plants
• Maintenance replacements to restore original panel protection without altering existing wiring schemas
• New installations where a 3-pole, 240V protective device is required to safeguard three-phase equipment
• Panel upgrades where matching the part number ensures alignment with enclosure mounting and trip characteristics

Fit, compatibility, and buying tips

Notes: Confirm fit and ratings before ordering. Part number is the best reference for compatibility. Use NA3P45-FLAT-TOP when your panel or replacement guide specifies the same designation to preserve mounting alignment and electrical behavior.

Installation and handling essentials

• Power off and lock out before working on the panel to ensure safe installation
• Verify that the panel’s bus connections and terminal torque requirements match the breaker’s design (consult your panel’s documentation)
• Handle with care to avoid physical damage to terminals or the trip mechanism
• Follow local electrical codes and manufacturer instructions for wiring and commissioning

What makes it a practical upgrade over generic breakers

• Three-phase protection in a compact, flat-top form factor that suits restricted or flush-mitting enclosures
• Clear alignment with the NA3P series mounting and electrical characteristics, reducing retrofit guesswork
• Clear, reliable 45A protection for common industrial loads, supporting safer startup and operation of equipment