Overview
The Square D QO220HID is a 2-pole, 20A miniature circuit breaker engineered for branch circuit protection in residential, commercial, and light industrial applications. With a 120/240V AC rating and 10 kA interrupt capacity, it provides thermal-magnetic trip protection against overloads and short circuits. This plug-on breaker mounts directly into QO load centers, NQ panelboards, and NQOD switchgear without tools.
Key Features
- Thermal-magnetic trip mechanism for dual-mode protection (overload and short circuit)
- VISI-TRIP indicator provides visual confirmation of tripped breaker status
- Toggle lever with quick-make, quick-break action and positive handle indication
- Overcenter mechanism ensures all poles trip simultaneously on single-pole overcurrent
- Plug-on design enables fast, secure connection to QO busbar without fasteners
- Listed to UL 489 and CSA standards for electrical safety
Technical Specifications
- Amperage Rating: 20 A
- Poles: 2
- Voltage Rating: 120/240V AC (50/60 Hz) / 5 kA @ 48V DC
- Interrupt Rating: 10 kA @ 120/240V AC; 5 kA @ 120V AC
- Trip Type: Thermal-Magnetic
- Mounting: Plug-On (QO Frame / 100A class)
- Actuator Type: Toggle lever with pressure plate terminals
- Wire Gauge: 14–10 AWG (main); 14–8 AWG (secondary)
- Operating Temperature: Up to 40°C ambient (104°F) at rated amperage
- Dimensions: 1.5″ W × 2.91″ D × 3″ H
- Certifications: UL 489, CSA, recognized for NEC Article 210 compliance
- Series: QO / QOB Miniature Circuit Breaker
Typical Applications
The QO220HID is ideal for:
- Branch circuit protection in residential panelboards and load centers
- Commercial lighting and small motor circuits
- Light industrial control panels and disconnect boxes
- Dedicated 240V circuits for HVAC, water heaters, and small appliances
- Retrofit installations in existing QO and NQ distribution equipment
Compatibility & Replacements
Compatible With
- Square D QO load centers and panelboards
- Square D NQ and NQOD panelboards
- OEM mounting bases designed for QO-frame breakers
- Speed-D switchboard distribution panels
Replaces / Drop-In Replacement For
- Existing QO220 thermal-magnetic breakers (standard variant)
- Other 2-pole, 20A QO-series breakers requiring hold-independent operation
Works With
- Square D QO electrical distribution equipment (load centers, panelboards, switchgear)
- Standard 120/240V single-phase branch circuits per NEC Article 210
- Thermal-magnetic trip logic compatible with standard residential and light commercial wiring
