What this reversing contactor assembly delivers
The 3RA2318-8XB30-2AK6 is a Siemens SIRIUS reversing contactor assembly — a pre-wired pair of contactors with mechanical interlock, ready to drop into a panel that needs forward/reverse motor control without building the interlock logic yourself. It ships with two 3RT2018-2AK62 contactors, size S00, so the reversing pair is matched from the factory — no separate sourcing of interlock kits or matching contactor ratings. The coil is wound for 110 V at 50 Hz and 120 V at 60 Hz, which means it lands directly on common North American and European control transformer secondaries without an extra voltage-matching relay.
Mounting and wiring — no surprises
Mounts on 35 mm DIN rail (snap-on) or directly with screws — the fastening method supports both, so it fits a new panel build or a retrofit into an existing drilled backplate. Spring-type terminals on both the coil and the main circuit — no screw torque to verify, just strip and push.
Mechanical life is rated at 10,000,000 cycles typical — well into the range for frequent reversing applications like conveyor shuttles or door drives. Available through independent distribution channels; current pricing and lead time confirmed at RFQ against your BOM quantity.