Siemens 3RA1931-1A Contact Block

Siemens 3RA1931-1A is a link module (electrical and mechanical) in the 3RA1 accessory family, designed to integrate Siemens 3RV1 protection devices with the 3RT1 and 3RW3 components that form part of Siemens motor-control assemblies. According to Siemens' specifications for the 3RV1 series, the module is intended for use with 3RV1.31/3RT1.3 and 3RW3 configurations and is designed for AC operation, providing the necessary interface that aligns and interconnects these units within a control panel. As an official Siemens accessory, the 3RA1931-1A enforces a standardized mechanical and electrical connection between the linked devices, supporting proper mounting and reliable electrical continuity in the system's protection and control scheme. It is part of the broader 3RA1 linkage module family, and listings for the same item are sometimes shown with variant codes (such as 3RA1931-1AA00) reflecting regional packaging or catalog differences.