Schneider Electric QO320 Plug-On Circuit Breaker

Description:

The Square D QO320 Circuit Breaker is used in industrial electrical distribution systems to provide reliable overcurrent protection for 3-phase circuits. Commonly installed in QO load centers, panelboards, and switchboards operating at 240V where coordinated protection of branch circuits and equipment is required. Maintenance teams, OEM panel builders, and electrical contractors use this breaker for system protection, panel upgrades, retrofit installations, and replacement of existing or failed QO-series breakers in industrial and commercial power distribution systems.

Applications:

The Square D QO320 circuit breaker is commonly used in commercial and industrial power distribution systems including motor control panels, HVAC systems, machinery power feeds, manufacturing equipment, and facility electrical infrastructure where 3-pole 240V circuit protection is required to safeguard equipment and ensure safe interruption of overload and short-circuit faults.

Technical Specifications:

• Manufacturer: Square D (Schneider Electric)
• Model / Part number: QO320
• Product type: Miniature circuit breaker (MCB)
• Series: QO plug-in type
• Poles: 3-pole
• Rated current: 20A
• Voltage rating: 120/240V AC
• Interrupting rating: 10 kA
• Trip type: Thermal-magnetic
• Mounting: Plug-in (QO load center compatible)
• Function: Overload and short-circuit protection
• Phase: 3-phase compatible configuration
• Standards: UL Listed / CSA Certified

Common Replacements:

• Square D QO320CP equivalent plug-in breaker
• Eaton BR320 20A 3-pole circuit breaker
• Siemens Q320 20A 3-pole breaker (EQ series equivalent class)