Active SIRIUS RC suppressor for 3RT1 S6-S12 frames
The 3RT1956-1CD00: It fits the 3RT1 S6, S10, and S12 contactor frames with screw-terminal drive connections.
Voltage window and thermal limits
The AC operating band is 127-240 V at either 50 Hz or 60 Hz; the DC band is 150-250 V. Stay within these rails — the RC element is sized for the coil energy of the S6 through S12 frames, not for general-purpose snubbing on smaller or larger contactors. The RC element dissipates the coil's stored energy as heat; in a crowded panel at 60 °C ambient, ensure the suppressor has air movement around the screw terminals to keep the internal temperature below the storage ceiling.
RoHS and compliance baseline
Substance prohibition date is 2006-07-01 — the part complies with RoHS restrictions effective from that date. No additional compliance documents (UL, CSA, CE) are listed in the spec record, so confirm the required agency marks with the order documentation at RFQ time.