What this assembly is and what it ships with
The Siemens 3RA2425-8XF32-2BB4 is a factory-assembled star-delta (wye-delta) contactor assembly from the SIRIUS family, size S0. It ships with three contactors: two 3RT2026-2BB40 units for the line and star legs, and one 3RT2024-2BB40 for the delta leg, plus the 3RA2923-2BB2 RS assembly kit. That means you get a matched set with the mechanical interlock and timing already integrated — no piecing together individual contactors and hoping the linkage works.
Rated at 15 kW at 400 V AC-3 (19 kW at 500 V and 690 V), this assembly handles standard three-phase induction motors up to those loads. The 24 VDC coil (closing power 13.8 W) means it integrates cleanly into a 24 VDC control circuit — common in modern panels with PLC-based control. The AC-3 maximum switching rate of 1 000 operations per hour tells you it is sized for frequent starting duty, not just infrequent on-off. Spring-loaded terminals on both the main current circuit and the auxiliary/control circuit (accepting 2x 0.5 to 2.5 mm² stranded or 2x 1 to 10 mm² solid) speed up wiring and eliminate the need for torque-checking screw terminals. The assembly requires a 35 A fuse assignment (gG NH 3NA, DIAZED 5SB, or NEOZED 5SE) for type 2 coordination.
Clearance requirements: 6 mm upwards, forwards, and to the sides; 0 mm backwards. Vibration resistance at AC: 11.8 g / 5 ms, 7.4 g / 10 ms; at DC: 15 g / 5 ms, 10 g / 10 ms. Dimensions: 135 mm wide, 114 mm high, 181 mm deep.