Siemens Contactor Assembly Kit. Accessory Type: Function Module. Range: SIRIUS. For Use With: 3RT2 Communication Capable Contactor, AS-i, Direct Start, S0 Contactor, S00 Contactor, S2 Contactor, S3 Contactor, Spring Type Terminal. Size: S0, S00, S2, S3. Series: 3RA2712. Voltage Rating: 24 V dc. MPN: 3RA2712-2AA00