The Siemens 3VU9135-1BB01-0RE0 is an accessory for the 3VU13 switch, specifically a 3-phase infeed terminal in a raised design for busbar systems. It connects the switch to the busbar, providing the incoming power feed point within the panel.
As a busbar infeed terminal in a raised design, this accessory mounts directly onto the 3VU13 switch and interfaces with a 3-phase busbar system inside the enclosure. The raised profile accommodates busbar runs where clearance or routing requires the terminal to sit above the switch body.