Siemens 3RT2026-1BB40 Three-Phase Motor Contactor

Siemens 3RT2026-1BB40 is a three-pole power contactor in the Sirius 3RT family, engineered for AC-3e/AC-3 motor-start duty with a main rating of 25 A and 11 kW at 400 V. It uses a 24 V DC coil and includes a single auxiliary contact pair: one normally open (NO) and one normally closed (NC). The main circuit comprises three poles with screw-terminal connections, and the device is sized in the S0 category for compact control panels. This contactor is designed to switch three-phase motors up to 11 kW at 400 V while controlled from a 24 V DC control circuit, making it suitable for machine tools, conveyors, pumps, and fans in automation where reliable motor control is needed. Pair it with appropriate overload protection and control electronics in a control cabinet, and it serves as a compact motor starter in fixed- or modular installations.