S0 reversing assembly with spring terminals
The Siemens 3RA2324-8XB30-2FB4 is a SIRIUS reversing contactor assembly in the S0 frame size, built around two 3RT2024-2FB40 contactors. Spring-type terminals on both the main current circuit and the magnet coil eliminate screw-torque checks during panel build — the cage clamps the conductor when the actuator is pushed in.
Motor ratings and mounting flexibility
The AC-4 rating at 400 V is also 5.5 kW, meaning the assembly handles plugging and inching without derating. Clearance requirements: 6 mm upwards, forwards, and to the side, 0 mm backwards — tight panel layouts are feasible with zero rear gap. Dimensions are 90 mm wide, 114 mm high, and 145 mm deep — the S0 footprint fits standard motor starter slots in distribution panels. Vibration resistance: 11.8 g / 5 ms and 7.4 g / 10 ms on AC, 15 g / 5 ms and 10 g / 10 ms on DC.
RoHS compliance date is 10/01/2009 — the assembly meets the EU RoHS directive. No UL or CSA listing is stated in the spec record; verify site-specific approval requirements before specifying for North American panels.