The Siemens 3RV1915-1AB00-0FJ0 is a 3-phase busbar with a 45 mm scale division, designed to bridge two switches in a motor feeder or distribution panel. The fork-form connections (Fa. Benedikt & Jaeger style) mate directly to the line-side terminals of the switch, so no additional lugs or jumper wires are needed — one mechanical clip-in and the power distribution is made. This is a panel-integration part, not a standalone device. It lives inside the enclosure, typically on the incoming side of a pair of 3RV motor starter protectors or 3RV circuit breakers. The 45 mm pitch matches the standard mounting centres of the SIRIUS 3RV2 compact range, so the busbar sits cleanly across the two devices without bending or adaptors.
The 45 mm scale division is fixed — it bridges two switches that are mounted side-by-side at that exact pitch. If your panel layout uses a different spacing (e.g., 55 mm for larger frames), this busbar will not align. Verify the switch model and its mounting centres before committing the busbar to the BOM. Fork-form connections mean the busbar tabs slide into the switch's line-side terminal clamps. No separate ring lugs or crimp ferrules are required. The connection is rated for the full switch current, so no derating is needed for the busbar itself — the limiting factor is the switch's own rating.