SIEMENS 3RT2038-1KB40

Siemens 3RT2038-1KB40 SIRIUS Power Contactor Description The Siemens 3RT2038-1KB40 is a high-performance 3-pole power contactor from the SIRIUS modular system. It is designed for switching electric motors and is ideal for industrial applications requiring reliability and durability. This size S2 contactor operates with a 24V DC coil and has an operational current rating of 80A (AC-3 at 400V). It includes one normally open (1NO) and one normally closed (1NC) auxiliary contact for control circuit integration. Specifications Manufacturer: Siemens Product Series: SIRIUS Model Number: 3RT2038-1KB40 Contactor Size: S2 Number of Poles: 3 Coil Voltage: 24V DC Rated Operational Current (AC-3, 400V): 80 A Rated Operational Power (AC-3, 400V): 37 kW Auxiliary Contacts: 1NO + 1NC Mounting Type: DIN rail or screw mounting Label Info Contactor IEC/K 60947-4-1 AC-1: 90 A Ui = 690V Application This power contactor is commonly used in motor control centers, pump controls, conveyor systems, HVAC applications, and general industrial machinery for starting and protecting three-phase motors. Country of Origin Made in Germany. CO2 Impact Choosing this reused Siemens contactor over a new one prevents the emission of approximately 45.1 kg of CO2, contributing to a more sustainable industrial environment. Availability This item is in stock and ready for immediate dispatch. Order now from profideals for expert support and fast delivery. FAQ What is the screw terminal size for the main and auxiliary contacts on the 3RT2038-1KB40?For the main circuits, it accepts up to 2x 35mm2 stranded or 1x 50mm2 finely stranded. The auxiliary contacts accept up to 2x 2.5mm2. Always refer to the official datasheet for precise specifications. Can additional auxiliary contact blocks be mounted on this SIRIUS contactor?Yes, the SIRIUS modular design allows for mounting additional front and side auxiliary switch blocks to expand its functionality for more complex control circuits. What is the rated operational voltage (Ue) for this contactor?The rated operational voltage (Ue) for the main circuit is up to 690V AC, making it suitable for a wide range of industrial voltage systems. Last Update: Friday, March 13, 2026 profideals is not an authorized distributor, reseller, or representative of the products featured on this website. All product names, trademarks, brands, and logos used on this site are the property of their respective owners.