Square D QO2-4A Circuit Breaker

The Square D QO2-4A is a two-pole QO-series circuit breaker rated at 70 amps for 120/240-volt service, designed for plug-on mounting in Square D QO load centers and panelboards. This snap-in device protects two poles in a single enclosure, supplying overcurrent protection for a multi‑wire branch circuit and integrating with standard QO bus systems for straightforward installation and replacement within residential or light commercial electrical distributions. With a 70 A rating, it supports higher-current branch circuits, such as feeders or large-appliance circuits, when permitted by the panel’s rating and wiring method. The unit is suitable for 120/240 VAC operation and is intended for use in applications requiring reliable, code‑compliant protection within Square D-labeled installations. For exact compatibility, terminal configurations, mounting requirements, and panel listings, consult the official Square D QO catalog and the specific panel’s labeling to ensure proper fit and electrical compliance.