Schneider Electric's Square D 1775-S1-U11A is a magnetic coil for the 1775-series industrial relay, delivering 24 V AC operation at 60 Hz. It is designed for use with NEMA Size 3 and Size 4 starters, providing the energizing current needed to switch the relay contacts in industrial control and motor‑control circuits. The coil is specified as 24 V AC at 60 Hz, compatible with standard Square D 1775 starter configurations, and intended as the replacement energizing component for the 1775-S1-U11A relay. This coil enables maintenance without replacing the entire relay assembly.
