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Siemens 3RT2018-2FB44-3MA0 16A Contactor – 24V DC Coil, Diode

Siemens 3RT2018-2FB44-3MA0 16A Power Contactor with 24V DC coil, diode, and 2NO/2NC aux.

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ManufacturerSiemens

Part number3RT2018-2FB44-3MA0

Type Power Contactor

AC-3e/AC-3 Rating 16A

Power 7.5 kW / 400 V

Poles 3

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CAGE: 9NK75

AC-3e/AC-3 rated 16A current 7.5kW power 24V DC coil Integrated diode 2 NO + 2 NC auxiliary contacts Size S00 Captive auxiliary switch

Product description

The Siemens 3RT2018-2FB44-3MA0 is a 3-pole power contactor designed for AC-3e/AC-3 applications, rated for 16A and 7.5 kW at 400V. It features a 24V DC coil with an integrated diode for enhanced performance and coil protection. This model includes 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, utilizes spring-loaded terminals, and is size S00 with a captive auxiliary switch.

This versatile contactor is ideal for motor control, switching, and automation tasks in industrial environments where reliable DC operation with built-in suppression and multiple auxiliary contacts are needed.

Stanlo Automation, a veteran-owned distributor, offers the Siemens 3RT2018-2FB44-3MA0. We provide quality surplus industrial automation parts, ensuring you receive dependable components to keep your systems operational.

Technical specifications

Type	Power Contactor
AC-3e/AC-3 Rating	16A
Power	7.5 kW / 400 V
Poles	3
Coil Voltage	24 V DC
Integrated Diode	Yes
Auxiliary Contacts	2 NO + 2 NC
Terminals	Spring-loaded
Size	S00
Captive Auxiliary Switch	Yes

Common applications

Motor control

Industrial automation

Control panels

Switching multiple loads

Status feedback

Compatible systems

Compatible with Siemens 3RH21 auxiliary contact blocks and SIRIUS motor protection devices for comprehensive system integration.

Also known as

Siemens 3RT2018 Contactor 24V DC Siemens S00 Contactor Diode 3RT2018-2BB44-3MA0

Replaces / compatible with

This model replaces previous versions of 3RT2018 contactors with similar ratings and configurations, offering integrated diode protection and multiple auxiliary contacts.

Technical note

Expert tip

The captive auxiliary switch on this S00 size contactor ensures it remains attached during installation and maintenance, simplifying assembly.

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Frequently asked questions

How many auxiliary contacts does the Siemens 3RT2018-2FB44-3MA0 have?

The Siemens 3RT2018-2FB44-3MA0 power contactor is equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts. This provides ample flexibility for control, signaling, and interlocking functions.