The Siemens 3RT2026-2EK60 is a SIRIUS power contactor in the S0 frame size, built for switching motor loads in control panels. It uses spring-type terminals for the magnet coil, which speeds up wiring compared to screw-clamp versions — no torque driver needed, just strip and push. The contactor snaps onto a 35 mm DIN rail per DIN EN 60715 and can also be screw-mounted; the mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward or backward, giving panel builders flexibility in tight enclosures.
What the Ratings Mean for Your BOM Line
The mechanical life is rated at 10,000,000 operating cycles typical, so this contactor is built for high-duty applications like conveyor lines or pump stations where the cycle count adds up fast. The electrical endurance varies by duty: AC-1 (resistive loads) allows up to 1,000 operations per hour, AC-2 and AC-3 (motor starting and running) allow 750 ops/h, and AC-4 (plugging or inching) drops to 250 ops/h. The AC-3e rating at 750 ops/h matches the standard AC-3 figure, confirming this is the motor-duty workhorse rating. For a 230 V motor load, the contactor is rated at 3 hp; at 400 V it handles 3 A in the auxiliary contact circuit. The 24 V rated value of 10 A on the auxiliary switch means it can drive smaller control loads directly without an interposing relay. Clearance requirements are tight: 10 mm upwards, forwards, and downwards, and only 6 mm at the side. That 97 mm depth and 45 mm width mean it fits standard S0-size contactor slots in pre-drilled panel layouts. The spring terminals accept solid or stranded wire from 1 to 10 mm², and for the auxiliary circuit they accept 2x 0.5 to 2.5 mm² solid or stranded — so no special ferrules needed for the smaller control wiring.