Square D QOU320-1200 QOU3201200 - 20A 3 Pole Miniature Circuit Breaker

The -1200 suffix means this breaker includes a factory-installed auxiliary switch. This switch monitors the contact status and provides a remote signal to indicate whether the breaker contacts are open or closed.

No, QOU breakers are unit-mount devices designed for OEM panels, control panels, and DIN rail systems. They do not plug into or bolt onto standard QO or QOB load centers and panelboards.

This unit-mount breaker features slotted box lugs on both the line and load sides. It can be flush-mounted, surface-mounted, or installed on a standard 35mm DIN rail using the appropriate mounting hardware.

Yes, QOU miniature circuit breakers are fully tested, UL Listed, and CSA certified for reverse connection. They do not have restrictive line or load markings, allowing you to feed power from either side.

The 48 VDC rating with a 5 kA interrupting capacity makes this breaker ideal for protecting industrial control circuits, automation equipment, and low-voltage DC power supplies.

Yes, it includes the Square D Visi-Trip indicator. When the breaker trips due to an overload or short circuit, a red indicator becomes highly visible to help you quickly identify the faulted circuit.

The fixed thermal element provides delayed tripping to prevent nuisance trips from mild overloads, while the magnetic element responds instantaneously to clear severe short circuits.