Overview
The Square D QO220 is a 2-pole, 20-ampere thermal-magnetic circuit breaker designed for 120/240V AC circuits in residential and commercial electrical distribution systems. Built for reliable thermal-magnetic protection for 120/240V circuits, this miniature circuit breaker delivers fast overcurrent protection with a 10 kAIC interrupting rating and the signature Visi-Trip indicator to easily identify tripped circuits.
Key Features
- Plug-on design ensures a secure, tool-free connection to the busbar
- Over center, trip free toggle mechanism with quick make, quick break action and VisiTrip trip indication for visual indication that the circuit breaker has tripped
- Mounts into Square D QO load centers, as well as NQ and NQOD panelboards
- UL Listed under UL File E84967 and CSA Certified under CSA Master Contract 153555
- Single-phase, long-time and instantaneous (LI) trip protection
Technical Specifications
- Number of Poles: 2
- Amperage Rating: 20A
- Voltage Rating: 120/240V AC
- Interrupting Rating: 10,000 amperes (10 kAIC)
- Connection Type: Plug-In
- Phase: Single-phase
- Dimensions: 3″ H × 1.50″ W × 3″ L
- Trip Type: Thermal-Magnetic
- Certification: UL Listed (E84967) and CSA Certified
- Series: QO
- Manufacturer: Schneider Electric / Square D
Typical Applications
The QO220 is widely used in residential electrical panels, commercial branch circuits, and general-purpose overcurrent protection for 120/240V distribution systems. Its compact plug-in design and fast-trip characteristics make it ideal for branch circuit protection in lighting loads, small motor circuits, and general building wiring systems where code-compliant, reliable overcurrent protection is required.
Compatibility & Replacements
Compatible With
- Square D QO load centers and panelboards
- Square D NQ and NQOD distribution panels
- Speed-D switchboard distribution systems
- OEM interior configurations compatible with QO busbar
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The QO220 model designation follows Schneider Electric’s standard nomenclature; alternative model variants such as QO220VH exist with different voltage or interrupting ratings and should not be substituted without confirmation.
Works With
- Square D QO series circuit breaker accessories (shunt trips, auxiliary switches, alarm switches)
- Standard North American electrical panelboard systems rated for QO-series breakers
- 120/240V single-phase AC power distribution circuits
