Siemens SIRIUS 3RT2045-3AL20 Power Contactor, 80 A, 37 kW, 230 V AC, S3 Original Brand New

Overview

The Siemens SIRIUS 3RT2045-3AL20 is a high-performance power contactor designed for reliable and efficient switching of three-phase loads, particularly in motor control applications. This robust device belongs to the renowned SIRIUS 3RT2 product family, known for its compact design, exceptional reliability, and long service life. With a rated operational current of 80 A for AC-3e/AC-3 applications and a power rating of 37 kW at 400 V, it is engineered to handle demanding industrial tasks. The contactor features a 230 V AC control voltage for 50/60 Hz operation, ensuring compatibility with standard power systems.

Key Benefit

• High Performance: Capable of handling significant loads with an 80 A rating and 37 kW power, making it suitable for a wide range of industrial motors.
• Reliable and Durable: Part of the trusted Siemens SIRIUS family, offering a long mechanical and electrical service life, reducing maintenance and downtime.
• Flexible Connectivity: Combines robust screw terminals for the main circuit with fast and easy-to-use spring-loaded terminals for the control and auxiliary circuits, simplifying wiring and installation.
• Integrated Auxiliary Contacts: Comes with built-in 1 NO (Normally Open) and 1 NC (Normally Closed) auxiliary contacts, providing immediate feedback for control systems and interlocking.
• Space-Saving Design: Its compact size S3 footprint allows for efficient use of panel space in electrical cabinets.
• Global Standard Compliance: Meets international standards for safety and performance (IEC/EN 60947-4-1), ensuring its suitability for worldwide use.

Technical Specification

• Product Type: Power Contactor
• Series: Siemens SIRIUS 3RT2
• Product Number: 3RT2045-3AL20
• Rated Operational Current (AC-3e/AC-3): 80 A (at <= 60°C)
• Rated Power (AC-3): 37 kW at 400 V
• Number of Poles: 3-pole
• Control Supply Voltage: 230 V AC, 50/60 Hz
• Auxiliary Contacts: 1 NO (Normally Open) + 1 NC (Normally Closed)
• Main Circuit Connections: Screw terminals
• Control & Auxiliary Circuit Connections: Spring-loaded terminals
• Size: S3
• Mounting: Can be mounted on a DIN rail or with screws.
• Operating Temperature: -25 to +60 °C

Application

The Siemens 3RT2045-3AL20 contactor is an ideal component for various industrial applications, including:

• Switching and control of three-phase AC motors
• Control of lighting systems and heating loads
• Acting as an intermediate relay in automation and control panels
• Integration into motor starters, including star-delta starters

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