The Siemens 3VU9165-1AB03 is a set of three-phase bus bars belonging to the 3VU13 family, used to distribute power across multiple 3VU13 motor starter protectors or circuit breakers in a panel. The bus bars eliminate individual point-to-point wiring between the line side of each device, saving DIN-rail space and reducing wiring errors during build or retrofit. Critical to know for procurement: this part carries an NRND (Not Recommended for New Designs) lifecycle status. That means Siemens has flagged it for eventual phase-out, though it remains available for existing BOMs and service replacements. For new panel designs, check the 3VU13 family for the current bus bar order code — this one is a replacement-and-maintenance part now.
Packaged at 220 x 50 x 16 mm — a slim footprint that tucks between the line terminals of adjacent 3VU13 devices on a DIN rail. No extra panel depth needed beyond what the protectors themselves occupy. The bus bar set is a single piece per order, quantity unit of 1.