Overview
The Square D QO290VH is an 90A, 2-pole QO miniature circuit breaker with plug-in mounting, rated for 120/240V AC and a 22kA interrupting capacity. Its thermal-magnetic mechanism provides overload and short-circuit protection.
Key Features
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Protection: Thermal-magnetic overcurrent protection with a common-trip, two-pole configuration.
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Installation: Plug-in mounting occupies two panel spaces; box-lug terminals accept 4 AWG through 2/0 AWG copper or aluminum conductors.
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Compatibility: For compatible Square D QO/QON load centers and NQ panelboard systems. Verify the equipment label and installation instructions for the exact application.
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Performance: 90A rating, 22kA interruption at 120/240V AC, and Visi-Trip indication for identifying a tripped breaker.
Specifications
- Manufacturer part number: QO290VH
- Brand and family: Square D QO
- Current: 90A
- Poles: 2
- Voltage: 120/240V AC; 120V AC
- Interrupting capacity: 22kA at rated AC voltages, 50/60 Hz
- Mounting: Plug-in
- Terminals: Box lugs
- Conductor range: 4–2/0 AWG copper or aluminum
- Ambient calibration: 40°C (104°F)
- Certifications/ratings: UL Listed, CSA certified, HACR rated
- Dimensions: 3.5 in high × 1.5 in wide × 2.91 in deep
Common Applications
Overcurrent protection in compatible residential and light-commercial distribution equipment, including appropriately rated HVAC and other branch circuits requiring an 90A two-pole QO breaker. Select equipment and conductors for the actual installation and follow the manufacturer's instructions.
