The Siemens 3RV1917-5BA00 is an extension connector designed to link 3-phase busbars in the 3RV1917-1/4 series. This part is a phased-out product, with the official successor being the SIRIUS 3RV2 series, preferred replacement order code 3RV2917-5BA00.
The lifecycle stage for 3RV1917-5BA00 is listed as current, meaning the manufacturer still recognizes it as an active part number in their system, though the description explicitly marks it as a phased-out product with a designated successor.
This connector mounts onto the 3RV1917-1/4 busbar system, which itself clips onto DIN rails inside a motor control center or distribution panel. The busbar connection provides a common feed to multiple 3RV1 motor starter protectors without individual wiring per unit.