3RU1946-3AA01

The 3RU1946-3AA01 is a standalone installation adapter from Siemens' SIRIUS 3RU1 series, engineered to enable independent panel or DIN-rail mounting for Size S3 thermal overload relays. Designed for use with 3RU1146 overload relays, this accessory allows the protective relay to be mounted separately from the contactor across main power circuits operating up to . Electrically, the 3RU1946-3AA01 provides dedicated terminal connections to route main motor currents up to directly into the thermal overload relay without requiring direct mechanical coupling to a Size S3 contactor. It preserves full phase-monitoring capabilities, Class 10 tripping characteristics, and auxiliary fault signaling functions while expanding panel layout flexibility in complex motor starter configurations. Mechanically, the 3RU1946-3AA01 consists of a heavy-duty, flame-retardant mounting base that clips onto standard 35 mm DIN rails or fastens securely to panel backplates with screws. Equipped with touch-safe IP20 screw terminals for main conductor connections, it securely holds the Size S3 overload relay in place, simplifying wiring and maintenance access inside motor control centers and distribution cabinets. Purchase the 3RU1946-3AA01 at Electrical.com, your reliable partner for industrial and commercial electrical products. Our selection includes trusted mounting adapters, thermal overload relays, and contactor accessories from top manufacturers like Siemens, Eaton, Cutler-Hammer, and Schneider Electric, backed by a knowledgeable sales team ready to assist with technical questions, product selection, and support.