Siemens 3RT1026-1AC20 Three-Phase AC Contactor

Siemens 3RT1026-1AC20 is a SIRIUS three-pole power contactor engineered for reliable control of 3‑phase loads in industrial panels, with a compact S0 frame and screw-terminal wiring for straightforward installation. It uses a 24 V AC coil (50/60 Hz) and is rated AC-3 at 400 V, delivering up to 25 A of main-current capacity and handling up to 11 kW at 400 V. The unit provides three normally open (NO) main contacts, enabling simple motor-start sequences, and is designed for panel-mounting in standard control schemes. This model, 3RT1026-1AC20, is part of Siemens' Sirius lineup and is commonly used in motor control circuits; note that the successor model is 3RT2026-1AC20.