Overview
The Square D QO 2-pole circuit breaker is a UL-listed miniature circuit breaker designed for residential, commercial, and light industrial applications requiring overcurrent and short-circuit protection on 120/240V single-phase systems. This Square D QO breaker uses thermal-magnetic trip technology for reliable protection and features the signature Visi-Trip indicator for visual confirmation of fault conditions.
Key Features
- Thermal-magnetic trip mechanism for fast response to overcurrent and short-circuit faults
- Visi-Trip indicator with mid-position handle — red flag clearly marks tripped breaker
- Plug-on design for quick, tool-free connection to Square D QO load center busbars
- Compact 3/4-inch per pole width for space-efficient panel layout
- Trip-free toggle mechanism with quick-make, quick-break action for positive handle indication
Technical Specifications
- Current Rating: 20 Amperes
- Voltage Rating: 120/240V AC
- Number of Poles: 2
- Breaking Capacity: 10 kA (AIR)
- Mounting Type: Plug-on (snap-in)
- Trip Type: Thermal-Magnetic
- UL Listing: UL File E84967
- CSA Certification: CSA Master Contract 153555
- ANSI Certified: Yes
- Trip Indication: Visi-Trip visual indicator
Typical Applications
- Standard residential branch circuits (lighting, receptacles, appliances)
- Light commercial installations (office spaces, retail, small facilities)
- Replacement breaker in existing Square D QO panels
- 20-amp, 2-conductor circuits requiring simultaneous disconnection
- Retrofit and maintenance applications in commercial buildings
Compatibility & Replacements
Compatible With
- Square D QO load centers
- Square D QO and Homeline panelboards (NQ and NQOD rated)
- Standard single-phase 120/240V distribution systems
- CSED (Combination Service Entrance Devices)
- Panels with UL-listed 120/240V single-phase busbar assemblies
Replaces / Drop-In Replacement For
- Square D QO220 (standard 2-pole 20A breaker)
- Square D QO220CP (plug-on neutral variant, if neutral connections not required)
- Other 20-amp 2-pole 120/240V circuit breakers with 10kA rating in compatible frames
Works With
- Square D PowerLogic energy management systems
- Standard NEMA load center controls
- Facilities using 60 Hz AC power distribution
- Electrical systems rated for 50/60 Hz operation (10 kA at 60 Hz)
