3RT2018-1AF01

The 3RT2018-1AF01 features a 110V AC coil and one set of normally open auxiliary contacts. It has a rated insulation voltage of 690V, an impulse withstand voltage of 6kV, IP20 protection, an AC-3 16A/7.5kW rating, and dimensions of only 58×45×73mm, weighing approximately 0.233 kg.

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Siemens 3RT2018-1AF01 Electromagnetic Contactor, 110V AC Coil, 1NO Auxiliary Contact

Product Positioning

The 3RT2018-1AF01 is a 110V AC coil version with a normally open (NO) auxiliary contact, serving as a comparison with the 1AF02 (normally closed) for selection. The main circuit AC-3 is rated at 7.5kW/400V, 16A, with a rated insulation voltage of 690V, impulse withstand voltage of 6kV, and an IP20 front protection rating. It can operate stably in environments ranging from -25°C to +60°C. In addition to general type test certificates, the manufacturer's technical documentation also lists multiple test records, including EMV electromagnetic compatibility testing, functional safety assessment, and marine and railway environmental compatibility certification, demonstrating the depth of verification for this series of components in special environmental requirements. It is suitable for electromechanical integration projects with high environmental tolerance requirements.

Core Product Advantages and Features

110V AC coil, normally open auxiliary contact

The coil operates at 110V AC, 50/60Hz, and is equipped with one set of normally open (NO) instantaneous contacts, suitable for operation indication or start-up interlocking signals.

High insulation and shock resistance specifications

With a rated insulation voltage of 690V and a rated impulse withstand voltage of 6kV, it is suitable for panel installation spaces with harsh electrical environments.

Passed multiple environmental compatibility tests

The original manufacturer's documentation lists test/certification records for EMV electromagnetic compatibility, functional safety, marine and railway environments, etc.

Miniaturized S00 frame design

With dimensions of 58×45×73mm and a weight of approximately 0.233kg, it is suitable for installation inside densely packed control boxes.

project	Specification
model	3RT2018-1AF01
coil voltage	110V AC, 50/60Hz
Auxiliary contact	1 NO (Normal Open)
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
External dimensions (height × width × depth)	58×45×73 mm
weight	Approximately 0.233 kg
Mechanical life	30 million operation cycles
Rated insulation voltage	690V
Rated impulse withstand voltage	6 kV
Protection level	IP20 (front)
Operating ambient temperature	-25°C ~ +60°C (Storage temperature: -55°C ~ +80°C)

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3RT2018-1AF02

The 3RT2018-1AF02 coil has a voltage of 110V AC, a built-in set of normally closed auxiliary contacts, a mechanical life of 30 million cycles, an AC-3 electrical life of 10 million cycles, an AC-3 rated power of 16A/7.5kW, and a weight of approximately 0.232 kg.

3RT2018-1AD01

The 3RT2018-1AD01 coil has a voltage of only 42V AC, which is a rare low-voltage coil option in the Siemens SIRIUS series. It is equipped with one set of normally open auxiliary contacts, AC-3 rated 16A/7.5kW/400V, S00 frame, screw terminal wiring.

3RT2018-1AB02

The 3RT2018-1AB02 uses a 24V AC coil, equipped with one set of normally closed auxiliary contacts, rated insulation voltage of 690V, S00 standard frame, AC-3 rated 16A/7.5kW, weighs only about 232.5 grams, and has an operating temperature of -25°C to +60°C.