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.
Width is 45 mm, height 85 mm, depth 97 mm — fits a standard S0 contactor footprint.
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.