Square D QO250PSPD Whole Home Surge Protective Device

Square D QO250PSPD is a plug-on-neutral, whole-home surge protection device designed to install in Square D QO load centers to shield all 120/240 V circuits in a home from damaging voltage spikes. This 50 kA surge current rated SPD is Type 1 protection for 120/240 VAC systems and uses a 1‑phase, 3‑wire configuration to deliver centralized surge mitigation for the entire panel. It plugs onto the panel bus with a Plug-On Neutral connection, providing protection for every branch circuit fed by the load center and helping defend appliances, electronics, and other sensitive equipment from transient surges caused by lightning, utility switching, or other disturbances. The QO250PSPD is specified for indoor installation in QO load centers, aligning with Square D’s residential protection ecosystem to offer a compact, panel‑level solution that acts at the source to reduce surge exposure across the home.