Square D QOU235 Miniature Circuit Breaker

While both belong to the Square D QO family, QOU breakers are designed for unit mounting rather than plugging into a load center bus bar. The QOU235 is intended for standalone use in OEM control panels or enclosures and can be surface mounted, flush mounted, or snapped directly onto a standard 35mm DIN rail.

No special adapter is required. The housing of the QOU235 is molded to clip directly onto a standard 35mm symmetrical DIN rail (35 x 7.5 mm). It can also be surface or flush mounted depending on your specific enclosure requirements.

The box lugs require a tightening torque of 45 lb-in for the supported 14 to 2 AWG aluminum or copper wire range. Using a calibrated torque tool ensures a proper connection and helps prevent high resistance thermal buildup at the terminals.

No. The QOU235 features reversible line and load box lugs. This provides flexible wiring options, allowing you to feed power from either the top or bottom terminals to best suit your panel layout and incoming wire routing.

Yes, this unit is HACR rated. It is certified to provide overcurrent protection for heating, air conditioning, and refrigeration equipment that requires this specific type of branch circuit rating.

This breaker features the Square D Visi-Trip indicator. When an overcurrent or short circuit trip occurs, a highly visible red flag appears in a small window on the face of the breaker, making it easy to identify the tripped circuit without needing to test each pole manually.