The Siemens SIRIUS 3RT1026-3AN20-1AA0 is a size S0 power contactor, rated for 11 kW at 400 V in AC-2 duty (slip-ring motor starting) and 15.5 A in AC-4 duty (plugging/reversing). The 45 mm wide body snaps onto a 35 mm DIN rail per EN 50022, or can be screw-mounted. Screw-type terminals on the main circuit accept up to 2x 10 mm² conductors.
Mounting and integration
Snap-on mounting onto 35 mm standard mounting rail per DIN EN 50022, or direct screw fixing. Side-by-side mounting is permitted without derating. Dimensions: 45 mm wide, 85 mm high, 91 mm deep — fits standard S0 contactor footprint in any control panel. Degree of pollution 3 environment rated. Operating temperature range -25 to +60 °C during operation. IP20 on the front, IP00 at the terminals — install in a suitable enclosure for touch protection.
Motor duty and coordination
Rated for 11 kW at 400 V in AC-2 duty class (slip-ring motors) and 15.5 A in AC-4 duty (plugging, inching, reversing). Coil operates at 50/60 Hz with an operating range of 0.8...1.1 x rated voltage at 50 Hz and 0.85...1.1 at 60 Hz. For type 2 coordination (no damage to contactor on fault), use gL/gG fuses up to 35 A; for type 1 coordination (contactor may need replacement), up to 100 A.
Auxiliary contact ratings
Built-in auxiliary contact block rated: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. Mechanical life typical 10 million operations.