Reversing contactor assembly — SIRIUS S0 frame
The 3RA2327-8XB30-2AC2 is a Siemens SIRIUS reversing contactor assembly built around two 3RT2027-2AC20 contactors, one per direction of rotation, in a size S0 frame.
Termination and wiring constraints
The magnet coil uses spring-type terminals as well, so the entire assembly is tool-less on the control side — a clean ship every time for panel builders who batch-wire multiple units. Dimensions are 114 mm high, 90 mm wide, and 97 mm deep — the 90 mm width is the S0 frame standard, so it occupies the same DIN footprint as a single S0 contactor plus the mechanical interlock.
Environmental and mechanical limits
Shock resistance is specified at 13.5g / 5 ms and 8.3g / 10 ms on AC, and 15g / 5 ms and 10g / 10 ms on DC — the DC shock values are higher because the contactor's holding force is not affected by the AC zero-cross.