3RT2023-1AC24

The 3RT2023-1AC24 is a Siemens SIRIUS S0 base contactor, AC-3 rated 9A, 4kW/400V, 24V AC low-voltage coil, with 4 sets of auxiliary contacts (2NO+2NC), screw terminal design, suitable for control panels with many safety circuits.

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Siemens 3RT2023-1AC24 AC Contactor 24V AC 2NO+2NC

Product Positioning

The 3RT2023-1AC24 belongs to the Siemens SIRIUS 3RT2023 series, specifically the S0 frame 3-pole contactor. The AC-3 rated current is 9A, 4kW/400V, and the coil voltage is designed for 24V AC, a common option in low-voltage control circuits, reducing the risks associated with operating voltage. Compared to the basic 1NO+1NC model in the same series, this part number has four sets of instantaneous auxiliary contacts (2NO+2NC), simultaneously meeting multiple control requirements such as self-holding, fault indication, and interlocking. It is suitable for panel designs with a large number of auxiliary contacts.

Core Product Advantages and Features

24V AC low voltage coil

It adopts a 24V AC coil design, which is compatible with common low-voltage control power supplies, reducing electrical risks in the operating environment.

4 sets of built-in auxiliary contacts

It comes standard with 4 sets of instantaneous auxiliary contacts (2NO+2NC), which can simultaneously meet the needs of multiple circuits including self-holding, indication and interlocking.

S0 frame general specifications

The main circuit AC-3 is rated at 9A, 4kW/400V, and shares the same installation dimensions as other models in the 3RT2023 series.

Screw terminal wiring

Both main and auxiliary circuits use screw terminals, which facilitates wiring and future maintenance and replacement.

project	Specification
Rated usage category	AC-3
Rated current	9 A
Rated power	4 kW / 400V AC
Base size	S0
Number of poles/main contacts	3 poles, 3NO
coil voltage	24V AC
Auxiliary contact	2NO + 2NC (built-in instantaneous contacts)
Terminal type	Screw terminals
Insulation voltage	690V
Protection level	IP20
Mechanical life	Approximately 10 million operations
Major Certifications	CE, UL, CSA, CCC

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