The Siemens 3RK1903-0AB00 is a terminal module for the ET 200S distributed I/O system, designed specifically for a direct-on-line (DOL) starter with supply line connection. It mounts on a standard 35 mm DIN rail and integrates the motor starter's power and control wiring into the backplane bus — a clean, pre-wired solution that saves panel space compared to a discrete contactor-and-overload assembly.
Lifecycle and Sourcing
For a BOM line that needs this exact order code, the part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
Panel Integration
Snap-on mounting onto 35 mm DIN rail, same footprint as the SIRIUS contactor family. The module connects the DOL starter's power feed and control signals to the ET 200S backplane, eliminating point-to-point wiring between the starter and the I/O module. Verify the supply line connection matches your incoming feed — the module routes both motor and control voltage through the same terminal block.