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.

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Siemens 3RT2018-1AB02 Electromagnetic Contactor, 24V AC Coil, 1NC Auxiliary Contact

Product Positioning

The 3RT2018-1AB02 is a 24V AC coil version. Unlike the more common 24V DC coil models (such as 1BB41/1BB42), this model requires a 24V AC power supply and is suitable for direct replacement of existing distribution panels that originally used AC 24V control transformers instead of DC power supply architectures. It has one set of normally closed (NC) auxiliary contacts, a rated insulation voltage of 690V, and can withstand a 10A auxiliary contact load. The main circuit is AC-3 rated at 7.5kW/400V, 16A, with an operating temperature range of -25°C to +60°C. Weighing only about 232.5 grams, it uses an S00 standard mounting frame and screw terminal wiring, making it suitable for control cabinets with limited space and requiring lightweight components.

Core Product Advantages and Features

24V AC coil, normally closed auxiliary contact

The coil is driven by 24V AC, unlike the DC coil version with the same voltage, making it suitable for direct use in existing 24V AC control transformer architectures.

Auxiliary contact rated 10A

The normally closed auxiliary contact has a rated current of 10A, which can carry general PLC input or indicator light loads.

Rated insulation 690V

The rated insulation voltage of the main and auxiliary circuits is 690V, which meets the application requirements of IEC standard pollution level 3.

Lightweight design, weighing only 232.5 grams

Its small size and light weight facilitate dense panel configuration and quick on-site replacement of spare parts.

project	Specification
model	3RT2018-1AB02
coil voltage	24V AC
Auxiliary contact	1 NC (Normally closed, rated 10A)
Rated operating current (AC-3)	16 A (the catalog may list a maximum of 17 A)
Rated power (AC-3, 400V)	7.5 kW
Extreme number	3P
Mounting Frame	S00
Wiring method	Screw terminals
weight	Approximately 0.2325 kg (232.5g)
Rated insulation voltage	690V
Operating ambient temperature	-25°C ~ +60°C
Installation method	35mm DIN rail/panel

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