The Siemens 3RT7026-1AQ00 is a Size S0 contactor from the SIRIUS family, built for switching three-phase motor loads in control panels. It carries three normally-open main contacts rated for AC-3 duty up to 690 V, with screw-type terminals on both main and auxiliary circuits. The coil is AC-operated, and the contactor snaps onto a 35 mm DIN rail per EN 50022 — screw-mount also works if the panel layout calls for it.
What the ratings mean for fit
The AC-3 rating at 690 V is the motor-switching current — that's the figure that decides whether this contactor handles your induction motor without welding contacts. The 3-pole set is for three-phase loads; if your circuit needs a fourth pole or NC main contacts, this isn't the variant. Side-by-side mounting is allowed, so you can gang multiple units on the same DIN rail without derating for heat buildup. IP20 on the front and terminals means finger-safe protection — standard for enclosed panels. The screw terminals accept two conductors per clamp, from 0.5 to 2.5 mm² solid or stranded, with or without ferrules. That's enough for most motor-circuit wiring up to the rated current.
Panel integration and environment
Mounts on a 35 mm DIN rail per EN 50022 — snap-on for speed, screw-down for vibration resistance. The mounting position is flexible: ±180° rotation on a vertical surface, and you can tilt it forward or backward by ±22.5°. Operating temperature range is -10 to +55 °C; storage from -25 to +70 °C. Pollution degree 3 means it's rated for industrial environments with conductive contamination — typical for a panel not sealed from factory dust. Shock resistance is 12.5g at 5 ms and 7.8g at 10 ms sine pulse — tough enough for most machine-mounted panels. The auxiliary switch option is available as a product extension if you need feedback contacts later.