The Schneider Electric Square D SU3040D400N20015 is a heavy-duty electrical enclosure designed for robust power distribution in demanding industrial environments. This unit is part of the Square D Safety Switch product line, engineered for reliable circuit isolation and personnel protection. Its construction supports integration into main power distribution panels or as a standalone disconnect for critical machinery.

Technical details

• Series: Square D Safety Switch
• Enclosure Type: NEMA 3R (suitable for outdoor use, rain-tight)
• Amperage Rating: 400 Amps
• Voltage Rating: 400 Volts AC
• Number of Poles: 3-Pole
• Disconnect Switch Position: Top-mounted for enhanced operational safety and accessibility.
• Interrupting Rating: 200,000 Amps (kAIC) - This indicates the maximum fault current the switch can safely interrupt.
• Wire Size Compatibility: Designed to accommodate a range of wire gauges suitable for 400A service. Specific terminal sizes should be verified against the manufacturer's datasheet.

Applications & compatibility

This 400A, 3-pole safety switch is commonly deployed in applications requiring high-capacity power disconnects, such as main service entrances for industrial facilities, large motor control centers, or as a disconnect for heavy machinery like large pumps, compressors, or manufacturing equipment. Its NEMA 3R rating makes it suitable for installations where exposure to weather is a concern.

Available from Industrial Automation Co as new, refurbished, or surplus stock, backed by a 2-year warranty with same-day shipping on in-stock items. Request a quote for the Schneider Electric Square D SU3040D400N20015 or contact our technical team for cross-reference assistance with compatible Square D safety switch components.