Square D QOU245 45A 240V 2-pole Miniature Circuit Breaker

Product Description

The SQUARE D QOU245 is a 2-pole miniature circuit breaker rated at 45 amps and 240 volts AC, designed for panel mount installation in load centers and distribution boards. It provides overcurrent and short-circuit protection for branch circuits in residential and light commercial electrical systems. Box lug terminal connections accept wire sizes from 14 to 2 AWG, giving installers flexibility across a range of conductor sizes. The QOU245 carries UL Listed, CSA, IEC, and RoHS certifications, meeting the compliance requirements common to HVAC, refrigeration, and heating equipment branch circuits.

The QOU245 is suited for branch circuit protection serving air conditioning and refrigeration equipment as well as electric heating loads. It is a panel mount breaker intended for installation in compatible load center enclosures. Electricians and HVAC technicians commonly specify this breaker when protecting dedicated equipment circuits in both new construction and service replacement applications. The 2-pole configuration interrupts both ungrounded conductors simultaneously, as required for 240-volt branch circuits.

Key Features

• 45-amp continuous rating with 240 VAC 2-pole overcurrent protection
• Box lug terminal connections accept 14 to 2 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

Designed for use with air conditioning and refrigeration equipment and heating systems as an OEM-style panel mount circuit breaker replacement. Verify load center compatibility with the QOU breaker series before installation.

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 before handling or installing the breaker. Ensure wire terminations are seated fully in the box lug terminals and torqued per the terminal markings on the device. Do not install the breaker in a load center that does not accept the QOU series format.