The Siemens 3VU9135-1AB03-0RE0 is a three-phase busbar accessory designed for the 3VU13 switch range. It connects three 3VU13 switches in a modular spacing of 3MW, distributing power across the group without individual wiring to each unit.
This busbar mounts directly onto the 3VU13 switch bases, replacing point-to-point phase cabling. The 3MW modular spacing matches the standard DIN-rail pitch of the switches, so the assembly stays aligned in the panel without extra brackets.