Square D 1775-S1-U18B Relay

Square D 1775-S1-U18B is a dedicated coil assembly for the 1775-S1 relay family from Square D (Schneider Electric), identified by the U18B suffix. This unit provides a 120 VAC coil to energize the relay, enabling switching of the associated contacts in industrial control circuits. As a replacement coil, it is designed to preserve the original control logic and timing while restoring reliable operation of legacy Square D equipment, without replacing the entire relay assembly. The 1775-S1-U18B coil is typically used in panel installations requiring a 120-volt coil option within the 1775-S1 lineage, supporting standard control and sequencing tasks, interlocks, and safety-related control circuits. When stocking or replacing, confirm the suffix U18B and 120 V coil rating to ensure compatibility with existing 1775-S1 devices and maintain proper electrical performance in your control system.