Siemens Power contactor, 24 V DC, 3-pole, size S3The compact Siemens power contactor is typically used to control motors, plants and to turn on electrical heating systems. The 3RT2046 1KB40 is ideal for the performance range up to 45 kW at AC 3 400 V. The SIRIUS power contactor uses a control supply voltage of 24 V AC and features one NC and one contact as auxiliary contact as well as a useful screw type connection. In size S3, the power contactor is a great solution for all load feeders with the