The 3RA6812-8AC: This rating directly governs the motor load it can switch — a 63 A AC-3 contactor pair or compact starter downstream sees the full rated current without derating at 400 V. The infeed-left design feeds the main circuit from the left side using screw terminals on the input (max 25 mm² solid/stranded) and spring-loaded terminals on the outgoing feeder (max 25 mm² solid/stranded). Three slots accept compact load feeders, making this a distribution block for a group of starters rather than a single motor path.
Mounting and panel integration
Mounts via screw and snap-on fastening to DIN rail — the 180 mm width, 208 mm height, and 144 mm depth fit standard enclosure layouts. Pollution degree 3 means it tolerates conductive dust and humidity typical of industrial panels without conformal coating. Spring-loaded terminals on the load side accept 2 x (2.5 … 25 mm²) solid or stranded, with a stripped length of 13 mm for the main contacts. The infeed-left orientation simplifies busbar routing when the panel feed enters from the left side.
Environmental and mechanical endurance
Shock resistance tested at 6 m/s² semi-sinusoidal, 10 ms duration in all axes; vibration resistance per 4–5.8 Hz at 15 mm amplitude and 5.8–500 Hz at 2 m/s² for 10 cycles.