Siemens 3RT2026-1KB40 Three Phase Motor Contactor

Siemens 3RT2026-1KB40 is a three‑pole power contactor from the SIRIUS 3RT family, engineered for AC‑3e/AC‑3 motor switching in industrial control panels. It is rated to carry 25 A and to switch motors up to 11 kW at 400 V, driven by a 24 V DC coil, and it comes in the compact S0 frame with screw terminals for reliable wiring and quick panel installation. The unit includes a plugged‑in varistor for surge suppression, and it provides a 1 NO + 1 NC auxiliary contact set, expanding its ability to feed PLC logic or signaling circuits without needing a separate interface module. With a net weight of 0.590 kg and packaging dimensions of 54.0 x 92.0 x 115.5 mm, the 3RT2026-1KB40 is designed for compact motor‑control tasks and is specified as not expandable with additional auxiliary switches.