3RT2023-1FB40

The Siemens 3RT2023-1FB40 uses a DC24V coil and is equipped with plug-in diode suppression, threaded terminals, and 1NO+1NC auxiliary contacts, making it suitable for applications near sensitive electronic circuits.

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Siemens 3RT2023-1FB40 DC24V Electromagnetic Contactor with Built-in Diode Suppression 1NO+1NC 9A/4kW

Product Positioning

The 3RT2023-1FB40 is a version of the SIRIUS 3RT2 S0 frame contactor equipped with a "plug-in diode suppression assembly". The coil's rated voltage is 24V DC, the main circuit AC-3 rated current is 9A, and the rated power at 400V is 4kW. The diode suppression assembly is installed in the coil circuit and absorbs the surge voltage generated by the coil's back electromotive force when the contactor is de-energized, reducing electromagnetic interference to other electronic equipment or signal lines in the same control box. It is particularly suitable for power distribution environments near sensitive electronic components such as sensors and communication modules. The auxiliary contacts maintain the standard 1NO+1NC combination, and the wiring method is a traditional threaded terminal. Installation and inspection methods are the same as the standard model.

Core Product Advantages and Features

Plug-in diode surge suppression

The coil circuit has a built-in pluggable diode suppression element that can absorb the coil surge voltage at the moment of power failure, reducing interference to nearby electronic equipment.

DC24V coil

The coil has a rated voltage of 24V DC and an operating voltage range of approximately 0.8 to 1.1 times the rated value, and can be directly driven by a 24V DC power supply.

1NO+1NC auxiliary contact

It comes standard with one set of normally open and one set of normally closed instantaneous auxiliary contacts to meet the needs of general interlocking and indication circuits.

Threaded terminals, S0 frame

Both the main circuit and the auxiliary circuit use traditional threaded terminals. The three-pole main contact AC-3 has a rated current of 9A and a rated power of 4kW at 400V.

project	Specification
model	3RT2023-1FB40
Coil rated voltage	DC 24 V
Coil type	DC electromagnetic coil with built-in plug-in diode suppression
Auxiliary contact configuration	1 NO + 1 NC (Instantaneous Type)
Wiring method	Screw terminal
Rated operating current Ie (AC-3, 400V)	9 A
Rated operating power (AC-3, 400V)	4 kW
Rated operating power (AC-3, 690V)	7.5 kW
Main contact pole number	3-pole (3NO)
Contactor size class	S0
External dimensions (width x height x depth)	45 x 85 mm, depth approximately 97 mm (AC coil) or 107 mm (DC coil) depending on coil type.
Rated insulation voltage Ui	690 V
Mechanical life	10 million cycles

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