Siemens 3RA1323-8XB30-1BB4 Reversing Contactor Assembly

Siemens 3RA1323-8XB30-1BB4 is a reversing contactor assembly from the SIRIUS 3RA2 family, designed for AC-3e/AC-3 motor control and used to reverse the direction of a three-phase drive. The unit is a three-pole device energized by a 24 V DC coil, built for integration in standard industrial motor circuits. It supports reversing configurations to enable bidirectional operation without rewiring, a hallmark of its AC-3e/AC-3 duty classification. The assembly incorporates interlock features—electrical and mechanical interlock variants are used to prevent unsafe or unintended operation and to coordinate with control logic. In many 3RA2 reversing contactor models, auxiliary contacts are provided to signal status to supervisory circuits, adding signaling options for PLCs and safety interlocks. Siemens documents these devices as compact, modular components suitable for motor control panels and automation equipment where reliable reversing capability is required.