The Siemens SIRIUS 3RA2326-8XB30-1AP6 is a reversing contactor assembly — a pre-wired pair of contactors with mechanical interlock that swaps motor phase rotation for forward/reverse control. It ships with two 3RT2026-1AP60 contactors already mounted and interlocked, so you bolt it to the rail, land the motor leads, and wire the coils to your control circuit. Rated at 11 kW at 400 V (AC-3) and 21 A at 480 V, it handles three-phase induction motors up to that load in a size S0 frame — 90 mm wide, 101 mm tall, 97 mm deep.
The headline 11 kW at 400 V is an AC-3 motor-switching rating — that's the current the assembly can make and break under full-load motor starts. At 690 V it's still rated 11 kW, so the voltage derate is flat across the 400–690 V range. The 21 A at 480 V and 22 A at 600 V are the corresponding current limits for those voltages. If your motor nameplate says 15 hp at 460/480 V or 20 hp at 575/600 V, this assembly covers it. Wire termination is screw-type on both the main circuit and the coil. The main circuit accepts solid conductors from 1 to 10 mm² in two ranges: 2x (1...2.5 mm²) and 2x (2.5...10 mm²). The coil terminals accept 2x (0.5...1.5 mm²) solid or 2x (0.75...2.5 mm²) stranded. That covers standard motor and control wiring without needing adapters.
The assembly is designed for DIN-rail mounting in a control panel. At 90 mm wide it occupies three standard 18 mm module spaces. The S0 contactor frame size is common across the SIRIUS line, so accessories like auxiliary contact blocks, surge suppressors, and busbar systems share the same footprint. Clearances: 6 mm above, below, and to the sides; no clearance needed behind the unit.