Star-delta assembly, S0 frame, spring terminals
The Siemens 3RA2423-8XF32-2AC2-ZA01 is a factory-assembled contactor set for star-delta (wye-delta) motor starting, built around three 3RT2024-2AC20-1AA0 contactors on a Size S0 frame. The 24 V AC/DC coil (50/60 Hz) with spring-loaded terminals on both main and control circuits means no screw tightening on the line — push the conductor in and it's locked.
Mounting and panel fit — 135 x 114 x 171 mm
Snaps onto 35 mm DIN rail or screws directly to the backplate; the 135 mm width, 114 mm height, and 171 mm depth fit a standard S0 footprint with clearance for the RS assembly kit (3RA2923-2BB2) included in the package. Mounting position is standing on a horizontal surface; the unit tolerates 6 mm misalignment in all directions except backward (0 mm), so the rail clip must seat fully before tightening.
Mechanical endurance and shock ratings
Rated 10 million mechanical operations typical — this is the contactor assembly's service life before wear-out, not the electrical endurance under load, which will be lower depending on switching frequency and motor size. Shock resistance is specified at 11.8 g / 5 ms and 7.4 g / 10 ms on AC; 15 g / 5 ms and 10 g / 10 ms on DC — figures that matter for mobile or vibrating equipment where the contactor must not drop out.
Wiring and conductor sizing
Spring-type terminals on the magnet coil and auxiliary circuits eliminate the need for torque wrenches — strip, insert, and the cage clamps the wire.
No auxiliary switch or bus communication module is fitted as standard (product extension auxiliary switch: No; product function bus communication: No), so any add-on must be ordered separately. Substance prohibited date of 10/01/2009 aligns with RoHS compliance; the assembly carries the SIRIUS brand designation and is documented for IEC/EN 60947-4-1 applications.