The Siemens SIRIUS 3RT2026-1AP00-2AA0 is a power contactor in the S0 frame size, fitted with a 24 VDC coil and screw-type terminals for the magnet coil.
The auxiliary contacts are rated 10 A at 24 V and 21 A at 480 V, so the switch can handle both low-voltage control signals and higher-voltage pilot loads without an interposing relay. Operating temperature range is -25 to +60 °C, which covers most indoor panel environments; storage range extends from -55 to +80 °C for warehouse or transport conditions. The S0 frame and 45 mm width mean it drops into the same DIN-rail footprint as other S0 contactors — no panel rework needed if you're swapping from a similar frame.