Square D QOB260 Miniature Circuit Breaker

This bolt-on circuit breaker is designed exclusively for use in Square D NQ and NQOD series panelboards. It secures directly to the busbar with a bolted connection, making it incompatible with standard QO plug-on load centers.

The box lug terminals require a tightening torque of 44.3 lb-in (5 N.m). This applies when landing either copper or aluminum conductors sized between 8 AWG and 2 AWG.

The Visi-Trip feature provides immediate visual identification of a tripped circuit. When a fault causes the breaker to trip, a red indicator flag appears in the window next to the toggle handle.

Both breakers offer the same 60A thermal-magnetic protection and electrical specifications. The difference is the mounting style. The QO260 is a plug-on breaker used in standard load centers, while the QOB260 features a bolt-on connection required for commercial NQ and NQOD panelboards.

No. This is a standard thermal-magnetic branch circuit breaker designed solely for overload and short-circuit protection. It does not contain AFCI or GFCI circuitry.

Yes, the QOB260 carries an HACR rating, indicating it is UL listed for use with compatible heating, air conditioning, and refrigeration equipment branch circuits.

Yes. The breaker is engineered with an over-center, trip-free toggle mechanism. The internal contacts will open and interrupt the circuit during an overcurrent or short-circuit event regardless of external pressure on the handle.