Overview
The Square D QO220HID is a high-density discharge (HID) miniature circuit breaker designed for reliable overcurrent protection in residential, commercial, and light industrial applications. This 2-pole breaker provides 20-amp protection on 120/240 VAC circuits with a 10 kA interrupting rating. The thermal-magnetic trip mechanism delivers fast, dependable protection with Qwik-Open® technology that trips within 1/60th of a second, ensuring rapid response to faults.
Key Features
- Plug-on design — Secure, tool-free connection to pressure plate busbar in QO load centers
- Visi-Trip® indicator — Red indicator flag clearly identifies tripped breakers for fast troubleshooting
- High-density discharge option — HID variant provides enhanced spacing and fault tolerance for compact installations
- Thermal-magnetic protection — Reliable overload and short-circuit protection on AC and DC systems
- Qwik-Open® technology — Faster-than-instantaneous trip response (under 1/60 second)
Technical Specifications
- Voltage Rating: 120/240 VAC / 48 VDC
- Amperage: 20 A
- Poles: 2 (2P)
- Frequency: 50/60 Hz
- Interrupting Rating: 10 kA at 120/240 VAC; 5 kA at 48 VDC
- Trip Mechanism: Thermal-Magnetic
- Mounting Type: Plug-In (Pressure Plate Connection)
- Wire Range: 14–8 AWG aluminum/copper (14–10 AWG copper)
- Operating Temperature: Calibrated for 40°C (104°F)
- Width: 1-1/2 inch (double-pole footprint)
- Certifications: UL, CSA listed
- Series: QO (Standard Miniature Thermal-Magnetic)
- Condition: New in Box
Typical Applications
The QO220HID is ideal for:
- General lighting circuits in commercial and residential panels
- Small appliance and equipment circuits requiring 20-amp protection
- High-density panel installations where space is limited
- OEM mounting bases and Speed-D switchboard distribution panels
- Control circuits and auxiliary power in automation and HVAC systems
Compatibility & Replacements
Compatible With
- Square D QO load centers and panelboards
- NQ and NQOD panelboards
- Speed-D switchboard distribution panels
- OEM mounting bases with QO pressure plate busbar
- AC and DC electrical systems rated 120/240 VAC or 48 VDC
Replaces / Drop-In Replacement For
- QO220 (standard variant without HID spacing)
- Other 20A 2-pole breakers in QO-compatible panels (verify panel manufacturer compatibility before ordering)
Works With
- Square D QO series circuit breaker accessories (padlock devices, handle ties, auxiliary switches)
- Standard electrical panel configurations using UL-listed miniature circuit breakers
- 50/60 Hz AC and DC distribution systems
