The Siemens SIRIUS 3RA2426-8XF32-2BB4 is a factory-assembled star-delta (wye-delta) contactor assembly — three contactors and an RS kit on a common mounting plate, wired and ready to drop into a panel. It's sized for S0 contactors, so it handles motor loads up to 22 kW at 400 V AC-3, 19 kW at 500 V or 690 V. The 24 V DC coil means it's a low-voltage-control part, common on PLC-driven or safety-relay circuits.
The AC-3 maximum operating voltage of 690 V tells you this assembly can switch motors on 400 V, 500 V, or 690 V three-phase systems — the power ratings drop at higher voltages because of the current derating, but the contactor's insulation class handles the full range. The 24 V DC coil is a common control voltage; the spring-loaded terminals on both the main and auxiliary circuits mean no screwdriver torque checks, just strip and push. The assembly comes with three specific contactors: two 3RT2027-2BB40 units for the line and delta legs, and one 3RT2026-2BB40 for the star leg, plus the RS bridging kit 3RA2923-2BB2. That means the wiring between contactors is already done — you land your motor and line cables at the spring terminals and connect the 24 V DC control wiring.
That's handy when you're squeezing it into a crowded panel and need to angle it for cable access. The S0 footprint is 135 mm wide, 114 mm tall, 181 mm deep, so it fits a standard 200 mm deep enclosure.
This part is in the current lifecycle stage — still an active catalog number from Siemens, no end-of-life notice on record. That means you can spec it into a BOM without worrying about a last-time-buy window closing.