Siemens AC-3e/AC-3 Power contactor, 3-pole, 2NO+2NC, 7.5kW, 24VDC, 16A Part number 3RT2018-1FB44-3MA0

Product Overview

The Siemens SIRIUS power contactor (SKU: 3RT2018-1FB44-3MA0) is a 3-pole device of size S00, rated for AC-3 switching at 16 A (7.5 kW at 400 V), with a 24 V DC coil including integrated diode, and auxiliary contacts configured as 2 NO + 2 NC for enhanced control and signaling.

Key Features

• Three-pole contactor (main section) with auxiliary contacts (2 NO + 2 NC)
• Rated operational current: 16 A (AC-3 at 400 V)
• Motor rating: 7.5 kW at 400 V (AC-3) or equivalent duty
• Control coil: 24 V DC with integrated diode for protection
• Size: S00 for compact mounting
• Screw-terminal connections for main, auxiliary and coil circuits
• Designed to IEC standards for voltage, insulation and impulse withstand

Technical Specifications

• Product Type: Power contactor, SIRIUS 3RT2 series
• Article Number: 3RT2018-1FB44-3MA0
• Main Circuit Poles: 3
• Rated Operational Voltage (AC-3/400 V): 16 A
• Rated Motor Power (AC-3/400 V): 7.5 kW
• Control Supply Voltage: 24 V DC
• Auxiliary Contacts: 2 NO + 2 NC
• Size: S00
• Insulation Voltage (Uᵢ): 690 V
• Surge Voltage Withstand (Uₚₘₚ): 6 kV
• Operating Ambient Temperature: –25 °C to +60 °C

Compliance & Certifications

• Designed to comply with IEC/EN standards for industrial controllers and switching devices
• CE-marked and suitable for global industrial use

Applications

Ideal for control of three-phase motors and general switching duties in industrial automation, this Siemens 3RT2018-1FB44-3MA0 contactor offers reliable performance in a compact size, making it suitable for machine integration, panel installations and OEM equipment where high switching capability in a small footprint is required.