Star-delta contactor assembly, 75 kW at 400 V
The 3RA2445-8XF32-1AP0 is a Siemens SIRIUS star-delta (wye-delta) contactor assembly — a pre-wired set of three contactors and the interlocking RS assembly kit on a common mounting plate, ready to bolt in and wire up for reduced-voltage motor starting. Rated 75 kW at 400 V and 110 kW at 690 V, this Size S3 assembly handles the motor starting current surge without the full inrush hitting the line, then transitions to delta run. It ships with two 3RT2045-1AP00 contactors for the line and star legs, and one 3RT2036-1AP00 for the delta leg — all screw-type terminals on the main and auxiliary circuits.
Mounting and panel fit — DIN rail or screw-fixed
Dimensions are 180 mm high, 220 mm wide, and 244 mm deep — the depth is the biggest footprint factor in a shallow enclosure. Clearance around the assembly: 10 mm upward, 10 mm forward, 10 mm downward, 10 mm at the side, and 0 mm backward (it can sit flush against the backplane).
Sourcing and lifecycle — active, quoted to order
The RS assembly kit (3RA2943-2C) is included, and the contactors are standard SIRIUS catalog items, so spares and replacements are straightforward to source. RoHS compliance date is 03/01/2017 — it meets the EU substance restrictions for current production.