The Siemens 3RT2026-1AN10 is a SIRIUS power contactor in the Size S0 frame, rated 21 A at 480 V AC-3 — the motor-switching duty that governs real load capability, not the higher AC-1 resistive number. Screw-type terminals on both coil and main contacts; an auxiliary switch is built in. Snaps onto 35 mm DIN rail per DIN EN 60715, or screws directly to the panel backplate.
Mounting and integration
Width is 45 mm, height 85 mm, depth 97 mm — fits a standard S0 contactor footprint. Clearance: 10 mm upwards, 10 mm forwards, 10 mm downwards, 6 mm at the side. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, so it fits tight enclosures without derating.
Contact ratings and operating limits
Main contacts are 3-pole normally open (3RT2026-1AN10 has no built-in NC pole). The auxiliary contact block is included — rated 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 0.6 A at 440 V, and 21 A at 480 V. Arcing time is 10 to 10 ms. Mechanical life typical 10 million operations.