Square D QOB350VH Miniature Circuit Breaker

This bolt-on circuit breaker is designed exclusively for use in Square D NQ and NQOD series panelboards. It cannot be installed in standard QO load centers, which require plug-on connections.

The QOB350VH features a bolt-on connection designed for secure mounting in commercial panelboards. The standard QO350VH uses a plug-on connection intended for residential and light commercial load centers. Both models share the exact same electrical ratings and physical dimensions.

The "VH" suffix indicates a "Very High" interrupting rating. While standard QOB breakers offer a 10kAIC rating, this VH model can safely interrupt up to 22,000 amps during a short-circuit fault at 120/240VAC.

As a member of the standard QO/QOB family, it requires three 3/4-inch spaces side-by-side, occupying a total width of 2.25 inches on the panel bus.

Yes, it carries an HACR rating, making it fully compliant for use with heating, air conditioning, and refrigeration equipment that requires this specific overcurrent protection certification.

Yes, it includes the Square D Visi-Trip indicator. When the breaker trips due to an overcurrent or short-circuit event, a highly visible red flag appears in the window, making it easy to quickly identify the tripped circuit in a crowded NQ or NQOD panel.

Yes, the integrated box lugs are dual-rated for both copper and aluminum conductors ranging from 8 AWG to 2 AWG. When using aluminum wire, it is standard practice to apply an approved oxide inhibitor to the stripped conductor before termination to prevent corrosion and thermal issues.