The Siemens SIRIUS 3RA2326-8XB30-1AK6 is a reversing contactor assembly — a pre-wired pair of contactors with mechanical interlock, sized S0, that handles motor reversing without external wiring.
DIN rail footprint and panel fit
Clearance requirements: 6 mm upwards, 6 mm forwards, 6 mm downwards, 6 mm at the side, and 0 mm backwards (flush against the rail).
AC-3 maximum switching rate is 750 operations per hour — that is the mechanical limit for reversing duty under load. AC-3e matches at 750 ops/h. Mechanical life is 10 000 000 cycles typical, so it outlasts most panel refreshes. Coil is screw-type terminals, 110 V at 50 Hz or 120 V at 60 Hz. The supplied contactor inside the assembly is 3RT2026-1AK60, which means the replacement contactor for the assembly is that exact unit — no guesswork on spare parts.
Wire termination and environmental range
Solid wire accepts 1 to 2.5 mm² on one pair and 2.5 to 10 mm² on the second pair. Stranded wire accepts 0.5 to 1.5 mm² and 0.75 to 2.5 mm². Shock resistance: 13.5 g / 5 ms and 8.3 g / 10 ms at AC, 15 g / 5 ms and 10 g / 10 ms at DC — relevant for mobile equipment or installations near rotating machinery.