Square D QOU170 Miniature Circuit Breaker 70A 1 Pole

Product Description

The SQUARE D QOU170 is a single-pole miniature circuit breaker rated for 70 amps at 240 volts AC. It provides overcurrent and short-circuit protection in residential and light commercial electrical panels. The panel-mount design uses box lug terminals and accepts wire sizes ranging from 12 AWG to 2/0 AWG, giving installers flexibility across a range of load conductor sizes. The QOU170 carries UL listing and CSA and IEC certifications, along with RoHS compliance. Licensed electricians install this breaker as part of load-center wiring for dedicated branch circuits serving high-draw equipment.

The QOU170 is rated for use with air conditioning and refrigeration equipment as well as heating systems. It is suited for dedicated branch circuits where a single-pole 70-amp protective device is required. The panel-mount form factor fits load centers designed to accept QOU-series breakers. This breaker is a practical choice for HVAC contractors and electricians wiring condensing units, heat strips, and similar high-amperage single-phase loads.

Key Features

• 70-amp continuous rating at 240 volts AC for high-draw branch circuits
• Single-pole configuration with panel-mount installation
• Box lug terminals accept 12 AWG through 2/0 AWG conductors
• UL listed, CSA certified, IEC compliant, and RoHS compliant
• Rated for air conditioning, refrigeration, and heating equipment applications

Compatibility

Rated for use with air conditioning and refrigeration equipment and heating systems. Designed for installation in load centers that accept QOU-series 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 before handling any breaker or wiring. Confirm that the conductor size and type are appropriate for a 70-amp circuit before terminating at the box lugs. Do not exceed the wire size range of 12 AWG to 2/0 AWG at the terminal connection.