Siemens AG 3RT2038-1KB44-3MA0 Power Contactor

Siemens 3RT2038-1KB44-3MA0 power contactor is a 3-pole motor-switching device from the 3RT2 family, designed for AC-3e/AC-3 loads in automation and PLC control circuits. It handles up to 80 A with a 37 kW rating at 400 V, making it suitable for switching three‑phase motors in industrial equipment. The coil is 24 V DC with a nominal operating range of 0.8–1.2 Us and includes an integrated varistor to suppress coil transients. The unit provides four auxiliary contacts—2 normally open and 2 normally closed—for signaling and interlock logic, wired through screw terminals; it uses frame size S2 and includes a removable auxiliary switch. Typical applications include motor control in conveyors, presses, packaging lines, and other factory machinery where a compact, high‑current contactor with built‑in auxiliary contacts supports PLC-driven control and simple interlocks. This Siemens device aligns with standard industry listings for the 3RT2 family and is designed for reliable integration into automation systems that require dedicated motor-contactor performance with auxiliary signaling in a compact footprint.