The Siemens 3RV1917-1E is a 3-phase busbar with infeed, designed to distribute power from a single feed to two circuit breakers in the S00 and S0 frame sizes. It carries a 63 A rated operational current across three poles, with spring-loaded terminals for the main circuit connection — no screw tightening needed, which speeds up panel wiring and eliminates torque-check steps on the busbar terminations. The infeed lands on the right side of the busbar.
The 3RV1917-1E is listed as a phased-out product. The manufacturer's preferred successor is the 3RV2917-1E, which carries the same function — 3-phase busbar with infeed for two breakers — but belongs to the SIRIUS 3RV2 generation.
The 3-pole design covers L1, L2, L3 distribution; the infeed lands on the right, so plan your upstream feeder cable entry accordingly. Snap-on mounting means no mounting screws or brackets; the busbar clips onto the same 35 mm DIN rail as the breakers, keeping the assembly compact.