Siemens 3RT1966-4G Three Pole AC Magnetic Contactor

Siemens 3RT1966-4G is a box-terminal accessory for Siemens Sirius contactors, designed to be used with 3RT1, 3RB2, and 3RW507 models. It provides a dedicated terminal interface to facilitate wiring connections to a three-pole contactor within panel installations. As a component in the Sirius modular system, the 3RT1966-4G is intended to accompany the specified contactor models in industrial control and motor control circuits. Verified listings show the part as 3RT1966-4G box terminal for contactors 3RT1, 3RB2, and 3RW507, confirming compatibility within the Sirius ecosystem. When selecting this accessory, ensure the target contactor is one of the 3RT1, 3RB2, or 3RW507 families to guarantee proper fit and electrical termination alignment. This box-terminal block helps organize wiring inside control cabinets and provides a standardized interface for field wiring to the associated contactor assembly in typical automation applications such as conveyors and machine tools.