SIEMENS 3RT2038-1KB40
- By SIEMENS
- Part #: 3RT2038-1KB40
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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 spareparts2day 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
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