3RT2023-1BB40

The 3RT2023-1BB40 is a Siemens SIRIUS S0 frame DC coil electromagnetic contactor, featuring DC24V control, AC-3 9A/4kW/400V main circuit, standard 1NO+1NC auxiliary contacts and screw terminal wiring, a mechanical life of 10 million cycles, and a weight of only 0.596 kg. It is suitable for PLC or DC control panel integration applications.

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Siemens 3RT2023-1BB40 DC Coil Electromagnetic Contactor DC24V 9A/4kW

Product Positioning

The 3RT2023-1BB40 is a Siemens SIRIUS 3RT2 series S0 frame three-pole electromagnetic contactor. The coil uses a 24V DC design, suitable for direct drive of control circuits via PLC output or DC power supply, eliminating the need for an AC transformer. The main circuit has a rated current of 9A and a rated power of 4kW/400V (AC-3), maintaining the same 9A rating at 500V and 690V, meeting various power distribution voltage requirements. It comes standard with 1NO+1NC instantaneous auxiliary contacts for easy signal feedback or interlocking control. Both the main and auxiliary circuits use screw terminal connections, making installation and maintenance intuitive. With a tested mechanical life of 10 million operations, an IP20 protection rating, 690V insulation voltage, and 6kV impulse withstand voltage, it is sufficient for long-term operation in typical industrial environments.

Core Product Advantages and Features

DC 24V coil design

It eliminates the need for an AC transformer and can directly drive the coil with PLC output or DC power supply, making it suitable for DC circuit integration in automated control panels.

AC-3 9A/4kW main circuit

It maintains a rated current of 9A at 400V, 500V and 690V, and a rated power of 4kW at 400V, covering a variety of field power distribution voltages.

1NO+1NC auxiliary contact

It has a built-in set of normally open and a set of normally closed instantaneous auxiliary contacts. The AC-15 is rated at 3A at 400V, which facilitates signal feedback and interlock protection.

Long lifespan and high protection

With a mechanical life of 10 million operations, IP20 protection, 690V insulation voltage, and 6kV impulse voltage withstand capability, it is suitable for long-term stable operation.

project	Specification
Rated operating current Ie (AC-3)	9 A (400V/500V/690V)
Rated operating power (AC-3, 400V)	4 kW
Number of poles/frame size	3P, Size S0
Control coil voltage	DC 24V
Coil holding/holding power	5.9 W / 5.9 W
Auxiliary contact configuration	1NO+1NC (Instantaneous Movement)
Auxiliary contact rated (AC-15, 400V)	3 A
Auxiliary contact rated (DC-12, 24V)	10 A
External dimensions (height x width x depth)	85 x 45 x 107 mm
weight	0.596 kg
Mechanical life	10 million times
Maximum operating frequency (AC-3)	1000 times/hour
Rated insulation voltage Ui	690 V (Pollution Level 3)
Rated impulse withstand voltage Uimp	6 kV
Protection level	IP20 (Front)

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