Square D QOU3301200 Miniature Circuit Breaker

The 1200 suffix indicates that this circuit breaker includes a factory-installed auxiliary switch with a 1A contact. This allows for remote monitoring of the breaker's open or closed status.

This unit-mount circuit breaker can be installed on a standard 35mm DIN rail, or it can be surface or flush mounted using mounting feet. It features a cable-in, cable-out design with box lugs on both the line and load sides.

No. QOU breakers are unit-mount devices designed for DIN rail systems, OEM panels, and control enclosures. They lack the plug-on or bolt-on clips required for standard QO or NQOD panelboards.

When the breaker trips due to an overcurrent or short circuit, the handle moves to a center position and a bright red indicator appears in a window on the case. This allows you to quickly identify the tripped circuit in a crowded control panel.

Yes, the QOU3301200 is HACR rated. This means it is certified for use with multi-motor and combination loads commonly found in heating, air conditioning, and refrigeration equipment.

To reset the breaker, you must first push the handle completely to the OFF position to reset the internal mechanism, and then push it back to the ON position.

Yes. The tripping mechanism in this three-pole breaker operates so that an overcurrent on any single pole will cause all three poles to open simultaneously, ensuring complete circuit isolation.