Siemens 3RT7026-1AN20 — SIRIUS Size S0 Contactor, 24 V DC Coil
Mounting is via screw or snap-on onto a 35 mm DIN rail per EN 50022. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward. Side-by-side mounting is permitted. Terminals are screw-type for both main and auxiliary/control circuits. The front and terminal faces carry IP20 protection — suitable for enclosed panel use where touch protection is required but no washdown exposure.
Ratings and Coordination
The main contacts are 3 NO (normally open). Rated insulation voltage is 690 V, with surge voltage resistance at 6 kV. Pollution degree 3 applies. For the auxiliary contact circuit, at 230 V rated value is 6 A, at 400 V rated value is 3 A, and at 690 V rated value is 1 A (50/60 Hz). Fuse coordination: for type 2 coordination, use gL/gG NH 3NA 35 A; for type 1 coordination, use 80 A. Maximum switching frequency at AC-3 is 800 operations per hour; at AC-4 it is 250 operations per hour. Shock resistance: 12.5g for 5 ms, 7.8g for 10 ms (sine pulse). Operating temperature range is -10 to +55 °C; storage range is -25 to +70 °C.
Dimensions and Wiring
Dimensions: width 45 mm, height 85.5 mm, depth 91 mm. This S0 footprint fits standard panel layouts and leaves room for auxiliary contact blocks (product extension for auxiliary switch is supported). Wire capacity: solid or stranded 2x (0.5...1.5 mm²) and 2x (0.75...2.5 mm²); finely stranded with ferrule also 2x (0.5...1.5 mm²) and 2x (0.75...2.5 mm²).