Overview: Siemens 3RT2017-1UB42-1AA0 Power Contactor
The Siemens 3RT2017-1UB42-1AA0 is a high-performance power contactor from the trusted SIRIUS family, designed for reliable switching of motors and other industrial loads. This 3-pole contactor is engineered to meet the demands of modern automation and control systems, offering a robust and compact solution for a wide range of applications. With an AC-3e/AC-3 rating of 12A and a power rating of 5.5 kW at 400 V, it provides efficient power control for motors up to this specification.
Key Features & Benefit
- High Performance & Reliability: Part of the globally recognized Siemens SIRIUS series, this contactor ensures long-term operational reliability and durability in demanding industrial environments.
- Integrated Varistor: The built-in varistor protects the coil against voltage spikes, extending the lifespan of the contactor and the associated control electronics.
- Space-Saving Design: The compact S00 size and upright mounting position allow for efficient use of space within control cabinets, making it ideal for applications where panel space is at a premium.
- Secure Screw Terminals: Features robust screw terminals for a reliable and secure electrical connection, simplifying installation and maintenance.
- Versatile Auxiliary Contact: Includes one normally closed (1 NC) auxiliary contact, providing flexibility for control circuit integration and status feedback.
- Energy Efficient DC Coil: The 24V DC coil is energy-efficient and suitable for direct integration into low-voltage DC control circuits, reducing power consumption.
- Globally Certified: Manufactured by Siemens, a leader in industrial automation, ensuring compliance with international standards for safety and quality.
Technical Specification
- Product Number: 3RT2017-1UB42-1AA0
- Product Type: Power Contactor
- Series: Siemens SIRIUS 3RT20
- Current Rating (AC-3e/AC-3): 12 A
- Power Rating: 5.5 kW @ 400 V
- Number of Poles: 3-pole
- Control Voltage: 24 V DC
- Coil Protection: Integrated varistor
- Auxiliary Contacts: 1 NC (Normally Closed)
- Terminal Type: Screw terminals
- Frame Size: S00
- Mounting Position: Upright
- Application: Motor switching, resistive load switching
- Manufacturer: Siemens
Application
The Siemens 3RT2017-1UB42-1AA0 is perfectly suited for a variety of industrial applications, including:
- Starting and stopping of motors
- Control of heating systems
- Switching of lighting loads
- Integration into machine control panels
- General industrial automation and power distribution
Visit our website to explore the full range of Siemens industrial automation products and other electrical components at Turll.












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