Square D QOU120HM 20A 240V 1-pole Miniature Circuit Breaker

Product Description

The SQUARE D QOU120HM is a single-pole miniature circuit breaker rated at 20 amps and 240 volts AC, designed for panel mount installation in residential and light commercial electrical distribution systems. It provides overcurrent protection for branch circuits serving air conditioning, refrigeration, and heating equipment. The breaker accepts wire sizes from 14 to 2 AWG via box lug terminals, giving installers flexibility across a range of conductor sizes. Electricians install this breaker as a replacement or new-circuit component inside load centers that accept QOU-series breakers. The compact form factor and standard panel mount design allow for straightforward swap-outs during service calls or panel upgrades.

This breaker is listed for use with air conditioning, refrigeration, and heating equipment, making it a practical stock item for HVAC and electrical contractors. It is suited for single-pole 240-volt branch circuit applications where a compact miniature breaker profile is required. Panel mount installation means the breaker seats directly into a compatible load center bus without additional hardware. Its box lug terminal connection accepts a wide AWG range, reducing the need for multiple breaker SKUs on service vehicles.

Key Features

• 20-amp overcurrent protection on a single-pole 240-volt circuit
• Box lug terminals accept 14 to 2 AWG conductors
• Panel mount design for direct installation into compatible load centers
• Listed for air conditioning, refrigeration, and heating circuit applications
• Meets CSA, IEC, UL, and RoHS compliance standards
• Compact miniature breaker profile fits high-density panel configurations

Compatibility

Listed for use with air conditioning, refrigeration, and heating equipment branch circuits. Designed as a panel mount miniature circuit breaker for load centers that accept QOU-series single-pole 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 absence of voltage before removing or installing any breaker. Ensure conductor size falls within the 14 to 2 AWG range supported by the box lug terminals and that torque is applied per the terminal markings on the device. Do not install this breaker in a panel that does not accept QOU-series breakers, as improper bus contact can create a hazardous condition.