Eaton DA3400W 400A 3-Pole 240 V Circuit Breaker

The Eaton DA3400W 400A 3-Pole 240 V Circuit Breaker is a high-capacity protection device built for demanding three-phase electrical systems. With a 400 amp rating and three poles, it serves as a reliable main disconnect or feeder breaker in commercial and industrial panels operating at 240 volts.

Key specifications

• Current rating: 400 A
• Poles: 3
• Voltage rating: 240 V
• Part number: DA3400W
• Typical use: main disconnect or feeder protection in compatible Eaton panels

Why choose the DA3400W for your system

• Three-pole design for complete three-phase protection – ensures all conductors in a 3-phase circuit are safeguarded, promoting balanced protection across phases.
• High-capacity protection – rated for 400 A, making it suitable for large feeders and motors common in commercial and light industrial environments.
• Precise part matching – DA3400W as the exact replacement model provides straightforward compatibility within Eaton’s ecosystem, simplifying stocking and maintenance.
• Versatile role – ideal as a main disconnect in service entrances or as a feeder breaker in distribution panels, helping streamline panel design and installation.

Ideal use cases

Best suited for facilities with substantial three-phase loads, such as manufacturing floors with large motors, data centers, HVAC infrastructure, and commercial spaces with heavy distribution feeders. The 240 V rating aligns with common commercial power distributions, while the 400 A capacity supports robust throughput without frequent tripping during normal operation.

Installation and safety considerations

For safe, code-compliant installation, engage a licensed electrician. Verify that your Eaton panel or switchgear is designed to accept the DA3400W model, and follow all local electrical codes during replacement or integration. Proper torque on connections and correct alignment with bus bars are essential for reliable operation and long-term service life.

In short, the Eaton DA3400W 400A 3-Pole 240 V Circuit Breaker delivers dependable three-phase protection with a specific replacement path in Eaton systems, helping you protect large feeders, simplify maintenance, and keep critical equipment running smoothly.