Form factor and what it connects to
The 3RA1942-2E: This is a base plate in the SIRIUS modular motor starter system, sized S3-S3-S2 with a lateral timing relay mounted side-by-side. It provides the mechanical and electrical backbone for stacking a motor starter protector (S3), a contactor (S3), and a second contactor or reversing module (S2), with the timing relay clipped alongside.
Lifecycle reality — phased out, successor named
For new builds or BOM revisions, the 3RA2 is the direct replacement. For existing panels with the 3RA1942-2E, sourcing is through independent distribution — quantities confirmed at RFQ, no stock-holding claim.
Sourcing posture for this phased-out base plate
The official successor (SIRIUS 3RA2) is the recommended path for new designs.