The RU4S-M-A220 is a 4PDT (4-pole double-throw) miniature universal relay with a 220-240V AC coil and momentary lever mechanism, designed for general-purpose switching and control applications. It features a maximum contact rating of 6A per pole with a coil resistance of 18,230 O (±10% at 20°C) and rated current of 4.2–5.0 mA at 50 Hz or 3.6–4.2 mA at 60 Hz. The relay operates with a maximum continuous applied voltage of 110%, pickup voltage of 80% maximum, and dropout voltage of 30% minimum, providing reliable switching performance across AC power systems. It includes a non-polarized LED indicator, mechanical flag indicator for contact position confirmation, lead-free construction, and cadmium-free contacts. The relay is UL Recognized, CSA Certified, and EN61810-1 compliant, making it suitable for industrial control panels, automation systems, and general-purpose switching where multiple independent circuits must be controlled simultaneously.