2CSF202101R3800 is a vacuum contactor made by ABB. It is an all-in-one, snap-on instant upgrade solution for contactors from 8A to 40A. It is suitable for operation with symmetrical power control and is a compact yet powerful contactor. It can be equipped with a manual override, for direct manual operation. It is designed for low loss, environmental safety and is rated for operation in a temperature range from -20 to +60 degrees Celsius. The contactor has a 3-pole design and offers fast switching even in demanding conditions. It includes several protection features such as line and load side thermal overload protection, anti-condensation contact, and contact protection. It is suitable for applications such as motor starters and reversing starters, lighting and fan control, single-phase and three-phase switching, and is approved for use in hazardous locations.