Square D QOU210 Miniature Circuit Breaker

The QOU210 is a unit-mount breaker equipped for versatile installation. It can snap directly onto a standard 35mm DIN rail or be mounted via surface or flush configurations using the built-in mounting feet. It does not plug onto a panelboard busbar.

Yes. The breaker utilizes slotted box lugs for both line and load connections and is UL tested for reverse connection. It lacks restrictive line or load markings, allowing you to feed power from either the top or bottom.

No. While it belongs to the broader QO family, the QOU series features a cable-in, cable-out design meant for OEM panels, control enclosures, and DIN rail systems. It will not snap onto the busbar of a standard residential QO load center.

It is equipped with the Square D Visi-Trip visual indicator. When an overload or short circuit causes the breaker to trip, a bright red indicator appears in the handle window to help you quickly identify the faulted circuit.

Yes. The QOU210 is HACR rated, making it fully compliant for use with heating, air conditioning, and refrigeration systems that require a 10 Amp, 2-pole disconnect or overcurrent protection device.

While commonly used in AC applications with a 10kAIC rating at 120/240VAC, this breaker is also rated for DC control circuits. It provides a 5kAIC interrupting rating at 48VDC.

It features a fixed thermal-magnetic trip unit with Long-Time and Instantaneous (LI) trip functions. This common trip design ensures both poles open automatically under overload or short circuit conditions.

No. The internal mechanisms are designed to operate reliably in any position, providing additional flexibility when routing 14-2 AWG wire in tight control panels or OEM enclosures.