The Siemens 3RT1026-3AP06 is a SIRIUS power contactor in the S0 frame size, with three normally-open main contacts and screw-type terminals for the main current circuit. It is rated for AC-3 duty at 11 kW on both 500 V and 690 V supplies, and delivers 15.5 A in AC-4 at 400 V — the figure that governs reversing or inching applications where the contactor makes and breaks the load under full current. The coil is rated for 50 Hz operation.
What the ratings mean for fit
The AC-3 rating of 11 kW at 690 V is the standard motor-switching figure for a contactor this size — it handles a 15 kW motor at 400 V (the common European line voltage) with headroom. The AC-4 rating of 15.5 A at 400 V is the one to watch for plugging or jogging duty: that current is the maximum the contacts can break repeatedly without accelerated wear. For resistive loads (AC-1), the contactor is rated at 10 A (AC-12). The mechanical life of 10 million operations means the coil and armature will outlast the contacts in most cycling applications.
Mounting and integration
Mounts on a 35 mm DIN rail per DIN EN 50022, using either the integral snap-on latch or screws. Side-by-side mounting is allowed with zero gap, saving panel width — the 65 mm wide body fits three across a standard 200 mm DIN rail section. Front protection is IP20 (finger-safe), but the terminal area is IP00, so live parts are exposed below the mounting surface. Pollution degree 3 means it is rated for industrial environments with conductive dust or condensation. Operating temperature range is -25 to +60 °C.