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Siemens 3RT2023-1KB40 9A 3-Pole Power Contactor

Siemens 3RT2023-1KB40 9A 3-pole power contactor with 24V DC coil.

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ManufacturerSiemens
Part number3RT2023-1KB40
Poles 3
AC-3e/AC-3 Rating 9 A
Power Rating 4 kW / 400 V
Coil Voltage 24 V DC
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AC-3e/AC-3 rated 9A current capacity 24V DC coil Integrated varistor protection 1 NO + 1 NC auxiliary contacts Screw terminals

The Siemens 3RT2023-1KB40 is a 3-pole power contactor rated for AC-3e/AC-3 duty, handling 9A and 4kW at 400V. It features a 24V DC coil with a control voltage range of 0.7-1.25* Uc and includes a plugged-in varistor for surge suppression. This size S0 contactor comes with 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, screw terminals, and is suitable for PLC outputs, with no additional auxiliary switches mountable.

This contactor is ideal for controlling motors, lighting systems, and other electrical loads in industrial automation, manufacturing, and building management applications. Its reliable switching capabilities and integrated protection features make it suitable for demanding environments where precise control and safety are paramount. Industries such as automotive, food and beverage processing, and water treatment commonly utilize such components.

Source your Siemens 3RT2023-1KB40 from Stanlo Automation, a veteran-owned business specializing in surplus industrial parts. We offer competitive pricing, fast shipping, and a commitment to quality, ensuring you get the reliable components you need to keep your operations running smoothly.

Poles3
AC-3e/AC-3 Rating9 A
Power Rating4 kW / 400 V
Coil Voltage24 V DC
Control Voltage0.7-1.25* Uc
Auxiliary Contacts1 NO + 1 NC
TerminalsScrew
SizeS0
ProtectionPlugged-in varistor
PLC Output CompatibleYes
Motor control
Lighting control
Automation systems
Industrial machinery
Power distribution
Control panels
PLC Outputs Control Systems
Siemens 3RT2023-1KB40 Contactor Siemens S0 Contactor 3RT20 Contactor
This part is a direct replacement for other Siemens 3RT2023 series contactors with similar specifications. Consult the manufacturer's documentation for full compatibility.
Expert tip
The absence of a mountable auxiliary switch on this unit means it is designed for applications where only the main power circuit requires switching by the contactor itself.
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What is the control voltage range for the Siemens 3RT2023-1KB40?
The Siemens 3RT2023-1KB40 power contactor has a 24V DC coil with a control voltage range of 0.7 to 1.25 times the rated coil voltage (Uc).