The Schneider Electric Square D QOU3901021 is a 3-pole miniature circuit breaker engineered for reliable overcurrent protection in commercial and industrial electrical distribution systems. This breaker, part of the QOU series, is designed to interrupt fault currents and prevent damage to downstream equipment. Its robust construction ensures consistent performance in demanding environments.

Technical Details

• Series: QOU
• Poles: 3
• Voltage Rating: 240 VAC
• Current Rating: 90 Amperes
• Interrupting Rating: 10 kA at 240 VAC (This specification is derived from the '10' in the part number, common for QOU series breakers indicating 10kAIC. Buyers should verify against the manufacturer's datasheet.)
• Terminal Type: Lug terminals (Standard for this series, verify against datasheet for specific configuration)
• Mounting Type: Bolt-on (Standard for QOU series, verify against datasheet)
• Trip Unit: Thermal-magnetic (Standard for this series, verify against datasheet)

Applications & Compatibility

This 3-pole circuit breaker is suitable for use in main distribution panels, sub-panels, and motor control centers. It is commonly found in applications such as HVAC systems, lighting circuits, and general power distribution for manufacturing facilities, data centers, and commercial buildings. Ensure compatibility with your specific panelboard and system requirements by consulting the manufacturer's documentation.

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 QOU3901021 or contact our technical team for cross-reference assistance with compatible QOU series components.