Siemens 3RT2026-1B44-3MA0 Contactor

Siemens 3RT2026-1B44-3MA0 Contactor is a three-pole power contactor from the 3RT2 family designed for AC-3e/AC-3 motor-control duty, suitable for starting and stopping three‑phase motors in industrial panels. The main circuit is rated for 25 A and up to 11 kW at 400 V, while the coil operates at 24 V DC. It uses screw-terminal connections and includes two normally open plus two normally closed auxiliary contacts in a compact size S0 frame for signaling and interlocking. Depending on the suffix, variants offer different protective or auxiliary options—examples include 3RT2026-1FB44-3MA0 with a plugged-in diode across the coil, 3RT2026-1DB44-3MA0 with a plugged-in varistor, and 3RT2026-1BB44-3MA0 with a removable auxiliary switch—allowing integration with PLCs, control circuitry, and interlocks. These configurations help coordinate switching of motors with built-in signaling, making the device suitable for applications such as conveyors, pumps, and fans in automation cells and control panels.