3RT2018-1AN24

The 3RT2018-1AN24 features a 220V AC coil and four auxiliary contacts (2NO+2NC), making it more suitable for control panels requiring multiple interlocking signals than single-contact models in the same series. The AC-3 model is rated at 16A/7.5kW and weighs approximately 0.290 kg.

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Siemens 3RT2018-1AN24 Electromagnetic Contactor, 220V AC Coil, 2NO2NC Auxiliary Contact

Product Positioning

In the 3RT2018 series, the 1AN24 is one of the versions with the most auxiliary contacts: the coil is 220V AC, 50/60Hz dual-frequency, and the main body is additionally equipped with an auxiliary contact module, providing a total of 4 sets of instantaneous auxiliary contacts (2 sets of normally open and 2 sets of normally closed). This configuration is often used in applications requiring simultaneous output of both "operating" and "stopped/faulty" status signals, such as machines that need to report to multiple downstream controllers or safety interlocking circuits. Most products on the market are marked with the complete order code 3RT2018-1AN24-3MA0, indicating that this auxiliary contact module is pre-installed at the factory. When purchasing, it is recommended to check the complete part number to ensure that the number of contacts matches the requirements. The main circuit specifications remain AC-3 7.5kW/400V, 16A, S00 frame, and screw terminal wiring.

Core Product Advantages and Features

There are a total of 4 auxiliary contacts: 2NO and 2NC.

It provides two sets of normally open and two sets of normally closed instantaneous contacts, suitable for control systems that require multi-channel status feedback or dual interlocking.

220V AC coil, 50/60Hz compatible

The coil voltage is 220V AC, covering common dual-frequency power supply environments, and the installation is highly flexible.

Full order code including auxiliary modules

Most products on the market are marked as 3RT2018-1AN24-3MA0, which means that the auxiliary contact module is included with the main unit at the factory.

Main circuit specifications are common to the series.

The AC-3 is rated at 16A/7.5kW (400V), with an S00 frame and screw terminals, and can be assembled with thermal overload relays of the same series.

project	Specification
model	3RT2018-1AN24 (The complete code is commonly 3RT2018-1AN24-3MA0)
coil voltage	220V AC, 50/60Hz
Auxiliary contact	2 NO + 2 NC
Rated operating current (AC-3)	16 A
Rated power (AC-3, 400V)	7.5 kW
Extreme number	3P
Mounting Frame	S00
Wiring method	Screw terminals
weight	Approximately 0.290 kg
Installation method	35mm DIN rail/panel

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