SIRIUS 3RT2026-1AK64-3MA0 — Size S0 Power Contactor, 24 VDC Coil
The Siemens 3RT2026-1AK64-3MA0 is a SIRIUS-brand power contactor in the Size S0 frame, designed for switching motor and resistive loads in industrial control panels. It carries a 24 VDC coil with screw-type terminals and is rated for 6 A at 24 V rated value. Mounting is via screw and snap-on onto 35 mm standard mounting rail per DIN EN 60715, with the mounting position allowing ±180° rotation on a vertical surface and ±22.5° tilt forward/backward. The contactor occupies a 45 mm width on the DIN rail, with a depth of 141 mm and height of 85 mm — a compact footprint for the S0 frame class.
Switching Ratings and Duty Cycles
Maximum switching frequency varies by duty category: 1,000 cycles per hour at AC-1 (resistive load), 750 cycles/h at AC-2 and AC-3 (motor starting/running), and 250 cycles/h at AC-4 (plugging/inching). The AC-3e rating also caps at 750 cycles/h. Rated operational current at 24 V is 6 A; at 48 V and 60 V it drops to 2 A; at 110 V it is 1 A; at 125 V it is 0.9 A; at 220 V it is 0.3 A; at 400 V it is 3 A; at 440 V it is 0.6 A. The contactor also carries a 3 hp rating at 230 V. Arcing time is specified at 10 to 10 ms, and the contactor can handle AC arcing times of 4 to 16 ms.
Wiring and Clearance
Main contact terminals accept solid or stranded conductors from 1 to 10 mm². For auxiliary circuits, two conductors of 0.5 to 1.5 mm² or 0.75 to 2.5 mm² can be terminated per clamp. Clearance distances: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. These are the minimum air gaps required around the contactor for proper heat dissipation and arc containment.
Environmental and Lifecycle
Mechanical endurance is rated at 10,000,000 operating cycles typical for the contactor class.