Square D QOU310 10A 240V 3-pole Miniature Circuit Breaker

Product Description

The SQUARE D QOU310 is a 3-pole miniature circuit breaker rated for 10 amps at 240 volts AC, designed for panel mount installation in branch circuit protection applications. It connects via box lug terminals and accepts wire sizes from 14 to 2 AWG. The QOU310 provides overcurrent and short-circuit protection for three-phase or multi-wire branch circuits in commercial and residential electrical panels. Licensed electricians install this breaker as part of service panel work or equipment circuit upgrades. It carries UL Listing, CSA certification, IEC compliance, and RoHS compliance, making it suitable for a broad range of North American and international panel applications.

The QOU310 is specified 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. Its compact miniature form factor fits QOU-series load centers and compatible panelboards. The box lug terminal design supports solid or stranded conductors from 14 to 2 AWG, accommodating the wiring gauges typical in HVAC and light commercial equipment circuits.

Key Features

• 10 amp continuous rating at 240 volts AC for reliable branch circuit protection
• 3-pole configuration protects all three conductors simultaneously
• Box lug terminals accept 14 to 2 AWG solid or stranded wire
• Panel mount design for direct installation in compatible load centers
• UL Listed, CSA certified, IEC compliant, and RoHS compliant
• Rated for air conditioning, refrigeration, and heating equipment circuits

Compatibility

Designed for use with air conditioning, refrigeration, and heating equipment branch circuits. Compatible with QOU-series panel mount load centers that accept miniature circuit breakers of this pole configuration.

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 installing or removing any circuit breaker. Ensure conductor sizing matches the breaker ampacity and that all box lug connections are torqued to the panelboard and breaker manufacturer specifications found in the equipment documentation. Do not exceed the wire size range of 14 to 2 AWG at the terminal connections.