Square D QOU290 90A 240V 2-pole Miniature Circuit Breaker

Product Description

The SQUARE D QOU290 is a 2-pole miniature circuit breaker rated for 90 amps at 240 volts AC, designed for panel mount installation in residential and light commercial electrical distribution systems. It accepts wire sizes from 12 AWG through 2/0 AWG via box lug terminals, making it suitable for branch circuit protection on higher-draw loads. Licensed electricians install this breaker during new construction, service upgrades, or circuit replacements. It carries UL Listed, CSA, IEC, and RoHS compliance certifications, meeting the standards required for most North American and international installation scenarios.

The QOU290 is rated for use with air conditioning and refrigeration equipment as well as heating systems, making it a common choice for HVAC disconnect and branch circuit protection applications. Its panel mount configuration fits standard load centers that accept QOU-series breakers. The box lug terminal connection supports a wide conductor range, accommodating both smaller branch circuit wiring and larger feeder conductors up to 2/0 AWG.

Key Features

• 90-amp continuous rating at 240 volts AC for high-draw branch circuit protection
• 2-pole configuration interrupts both ungrounded conductors simultaneously
• Box lug terminals accept 12 AWG through 2/0 AWG conductors
• Panel mount design for load center installation
• Rated for air conditioning, refrigeration, and heating equipment circuits
• UL Listed, CSA certified, IEC compliant, and RoHS compliant

Compatibility

Rated for use with air conditioning and refrigeration equipment and heating systems. Designed as an OEM-style panel mount replacement for load centers accepting QOU-series 2-pole miniature circuit breakers.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize the panel and verify the absence of voltage with a meter before handling any breaker or bus connections. Ensure conductor size is within the rated 12 AWG to 2/0 AWG range before terminating at the box lugs. Do not exceed the breaker's 90-amp continuous rating for the connected load.