The Schneider Electric Square D QO3901021 is a 3-pole miniature circuit breaker engineered for robust electrical system protection. This unit is part of the QO series, a widely recognized line for its reliability in commercial and industrial environments. It is designed to safeguard circuits against overcurrents and short circuits, ensuring the integrity of connected equipment.

Technical Details

• Series: Square D QO
• Poles: 3
• Voltage Rating: 240V AC
• Current Rating: 90A
• Interrupting Capacity: 10kA
• Mounting Type: Plug-on
• Terminal Type: Screw clamp (verify against datasheet for specific wire gauge compatibility)
• Frame Size: Compact, shorter footprint compared to standard QO breakers

Applications & Compatibility

This 90A, 3-pole circuit breaker is suitable for use in various electrical distribution panels and load centers within commercial buildings, manufacturing facilities, and data centers. It is commonly employed to protect branch circuits supplying motors, transformers, and other inductive loads where a higher current rating and multi-pole protection are required. Ensure compatibility with your specific panelboard model 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 QO3901021 or contact our technical team for cross-reference assistance with compatible QO series components.