3RT2018-1AB01

The Siemens SIRIUS 3RT2018-1AB01 is a standard 3-pole electromagnetic contactor with an S00 frame. It has an AC-3 rated capacity of 7.5kW/400V and a rated current of 16A. It uses a 24V AC coil and has a built-in set of normally open auxiliary contacts. The screw terminal design makes it suitable for direct starting circuits of small motors.

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Siemens 3RT2018-1AB01 3-pole standard electromagnetic contactor AC-3 7.5kW/400V 24V AC coil

Product Positioning

The 3RT2018-1AB01 belongs to the smallest S00 frame in the Siemens SIRIUS 3RT2 series and is the entry-level model of a 3-pole standard electromagnetic contactor. Compared to the more common 3RT2017 model in the same series, the 3RT2018 has a slightly higher AC-3 rated power of 7.5kW/400V and a rated current of 16A, and is commonly used for direct starting of small motors, fan circuits, or auxiliary equipment control. This unit uses a 24V AC standard coil and screw terminals, and has a built-in set of normally open auxiliary contacts for status feedback. Its simple structure and compact size make it suitable for installation in space-constrained distribution boxes and control panels.

Core Product Advantages and Features

S00 compact frame, AC-3 high-order power

Although both belong to the SIRIUS 3RT2 mini contactor family, the 3RT2018 is one level higher than the 3RT2017, with AC-3 reaching 7.5kW/400V and 16A, suitable for starting motors of a slightly larger size.

24V AC standard coil

It adopts the industry-standard 24V AC, 50/60Hz coil voltage, and can be directly driven with a control transformer. The circuit design is simple and the materials are easy to prepare.

Built-in 1 set of normally open auxiliary contacts

The main body has integrated 1NO auxiliary contacts, which can provide contactor operation status signals without the need for additional auxiliary contact modules, simplifying wiring.

Screw terminals, 690V insulation design

Both the main circuit and the coil are connected by screw terminals, with an insulation voltage rating of 690V, which conforms to the general installation and maintenance practices of industrial distribution panels.

project	Specification
Model (MLFB)	3RT2018-1AB01
Casing size	S00
Extreme number	3-pole (3 NO main contacts)
AC-3 rated power	7.5 kW / 400V
AC-3 rated current	16 A
Maximum operating current	17 A
coil voltage	24V AC, 50/60Hz
Auxiliary contacts	Built-in 1 NO
Terminal type	Screw terminals
Insulation voltage	690V
net weight	Approximately 230g
Operating temperature range	-25°C ~ +60°C
country of origin	Germany
Environmental compliance	RoHS (effective October 1, 2009), WEEE recycling obligations
EAN code	4011209784062

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