Square D QOU2125 125A 2-pole Miniature Circuit Breaker

Product Description

The SQUARE D QOU2125 is a 2-pole miniature circuit breaker rated for 125 amps at 240 volts AC. It provides overcurrent and short-circuit protection for branch circuits and equipment loads in residential and light commercial electrical panels. The QOU2125 accepts wire sizes from 12 AWG to 2/0 AWG via box lug terminals, making it suitable for high-amperage branch circuits feeding large loads. It mounts directly to a compatible panelboard. Licensed electricians install this breaker as part of service panel work governed by the National Electrical Code (NEC). CSA, UL, IEC, and RoHS compliance confirms it meets widely accepted North American and international standards.

The QOU2125 is rated for use with air conditioning and refrigeration equipment as well as heating systems, making it a common choice for HVAC disconnect and subpanel branch circuit protection. Its 125-amp rating and 2-pole configuration allow it to serve 240-volt double-pole loads including condensing units, electric furnaces, heat pumps, and similar equipment. Panel mount installation allows direct integration into compatible Square D QO and compatible panelboards.

Key Features

• 125-amp overcurrent protection at 240 volts AC
• 2-pole configuration for double-pole 240-volt branch circuits
• Box lug terminal connection accepts 12 AWG to 2/0 AWG wire
• Panel mount design for direct panelboard installation
• Rated for air conditioning, refrigeration, and heating equipment loads
• UL Listed, CSA certified, IEC compliant, and RoHS compliant

Compatibility

Rated for use with air conditioning and refrigeration equipment and heating systems as stated by the manufacturer. Verify panelboard compatibility before installation, as miniature circuit breakers are designed for use with specific panel families.

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 and lock out the panel before installing or replacing any circuit breaker. Confirm wire gauge falls within the 12 AWG to 2/0 AWG range supported by the box lug terminals. Do not exceed the breaker amperage rating for the connected load.