Supplied as a ready-to-wire reversing pair
The 3RA2324-8XE30-2BB4: This SIRIUS reversing contactor assembly ships with two S0 contactors — a 3RT2024-2BB40 and a 3RT2024-2BB40-0CC0 — plus the mechanical interlock kit 3RA2923-2AA2 already fitted. That means it arrives as a single order code, pre-assembled for forward/reverse motor control, rather than you sourcing and interlocking two separate contactors and the RH kit.
Motor ratings that decide the fit
The AC-4 rating at 400 V is also 5.5 kW, which covers plugging and inching duty where the contactor opens under full locked-rotor current. Mechanical endurance is 10 million operating cycles typical for the S0 contactor frame. That is relevant for high-cycle applications like conveyor reversers or pump run-down timers — the contactor itself will outlast most panel rebuild intervals before the mechanism wears.
Panel integration and terminal constraints
The assembly measures 90 mm wide by 114 mm high by 107 mm deep — the S0 frame footprint. Clearances: 6 mm upwards, forwards, downwards, and to the side; zero clearance needed backwards. That means it fits tightly against the back panel without a ventilation gap. Both the main current circuit and the auxiliary/control circuit use spring-loaded terminals. No screw-torque check needed — push the ferrule or stripped wire in and the cage clamps it. This saves time on repetitive builds and eliminates the risk of a loose screw vibrating out.
Shock and temperature — what the numbers mean for reliability
The assembly is rated for 11.8 g at 5 ms and 7.4 g at 10 ms under AC shock, and 15 g at 5 ms / 10 g at 10 ms under DC shock. That is the half-sine pulse it can survive without the contacts bouncing or the interlock disengaging — relevant if the panel is on a mobile platform or near a press that transmits vibration through the floor.