Overview
The Siemens 3RT2018-1BM42 is a compact, high-performance 3-pole power contactor from the trusted SIRIUS 3RT2 series, specifically engineered for switching motors and non-inductive loads up to 16 A (AC-3e/AC-3) at 400 V with a maximum power rating of 7.5 kW.
This model features a 220 V DC coil voltage for reliable control in direct current applications and includes a pre-installed 1 NC (Normally Closed) auxiliary contact for integrated control circuit functionality. Its compact Size S00 and secure screw terminals make it an ideal choice for space-saving, robust, and easy-to-wire industrial control panels.
Key Technical Specification
- Product Number: 3RT2018-1BM42
- Manufacturer: Siemens
- Series: SIRIUS 3RT2
- Type: Power Contactor (Motor Contactor)
- Poles: 3-pole
- Rated Operational Current (Ie) (AC-3e/AC-3, 400 V): 16 A
- Rated Operational Power (Pe) (AC-3, 400 V): 7.5 kW
- Control Supply Voltage (Us): 220 V DC
- Auxiliary Contacts (Integrated): 1 NC
- Connection Type: Screw Terminal
- Size: S00
- Mounting: DIN Rail or Screw Mounting
- Standard Compliance: IEC 60947-4-1, UL, CSA, CCC
Benefits & Features
- Compact & Powerful (Size S00): Delivers a high switching capacity (7.5 kW) in a space-saving, miniature design, optimizing panel layout.
- High Reliability: Part of the proven Siemens SIRIUS modular system, ensuring high contact reliability and prolonged electrical and mechanical endurance.
- DC Coil Operation: Designed for seamless integration into control systems utilizing a 220 V DC supply.
- Integrated Auxiliary Contact: Comes standard with auxiliary contact for simplified control circuit wiring and status feedback.
- Simple Wiring: Features robust screw terminals for secure and easy connection of main and control circuits.
- Global Compliance: Fully compliant with international standards (IEC, UL/CSA), making it suitable for worldwide use.
- IE3/IE4 Ready: Optimized for efficient switching of modern, energy-efficient motors.
Function / Application
The Siemens 3RT2018-1BM42 Contactor is primarily used in industrial automation and control applications for:
- Motor Switching: Starting, stopping, and controlling 3-phase AC motors up to 7.5 kW/16 A.
- Load Switching: Controlling resistive, lighting, and other non-inductive loads (AC-1 duty).
- Integration: Used as the core component in a motor starter combination (when combined with a thermal or electronic overload relay and a circuit breaker).
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