SIRIUS S0 Frame Power Contactor
The Siemens 3RT2024-1AK60-ZX95 is a SIRIUS-branded power contactor in the S0 frame size, designed for switching motor loads and resistive loads in industrial control panels. It mounts on a 35 mm DIN rail per DIN EN 60715 using either screw or snap-on fastening, and the mounting position allows +/-180° rotation on a vertical surface with +/-22.5° tilt forward/backward. The contactor measures 97 mm deep, 45 mm wide, and 85 mm tall, fitting into standard panel layouts. The coil connection uses screw-type terminals, and an auxiliary switch is included as standard.
Switching Duty and Mechanical Life
Rated for 1,000 switching cycles per hour in AC-1, AC-2, AC-3, and AC-3e duty, and 300 cycles per hour in AC-4 duty. The AC-3 rating is the one that matters for standard motor starting — at 1,000 ops/h this contactor handles frequent start/stop cycles without overheating the coil or contacts. Typical mechanical life is 10,000,000 operations, which means it outlasts most equipment it controls under normal duty. The arcing time is 10 ms at 50/60 Hz, and the make/break times are 4 to 16 ms at AC — tight enough for coordinated motor starter assemblies.
Wire Sizing and Auxiliary Contact Ratings
Main power terminals accept solid or stranded wire from 1 to 10 mm², with dual-wire capability for 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) — useful for daisy-chaining control wiring. The auxiliary contact ratings span 10 A at 24 V down to 0.3 A at 220 V and 0.6 A at 440 V, covering typical PLC input and relay coil loads. The auxiliary switch also carries a 2 hp rating at 230 V, which is enough for small motor control circuits or contactor coil holding circuits in the same panel.
Environmental and Mounting Clearances
Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C — suitable for unheated enclosures in temperate climates. Minimum clearances around the contactor are 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side; these are the spacing requirements for heat dissipation and arc flash containment.
Sourcing and Lifecycle
The lifecycle stage is listed as current production, so this part is still an active catalog item from Siemens.