Overview
The Siemens 3RT2015-1AN21 power contactor is a core component of the modular SIRIUS system, designed for high-performance motor switching in industrial control applications. This 3-pole contactor is a reliable and compact solution for starting and stopping electric motors, replacing the well-proven 3RT1 series.
Part of the latest SIRIUS 3RT2 generation, this device is engineered for maximum reliability and flexibility. Its compact Size S00 construction saves panel space while offering high contact reliability and robust electrical performance for its power class. It is fully IE3/IE4-ready, ensuring compliance with the latest efficiency standards for motor control.
Benefit and Advantages
- Space-Saving Design: The compact S00 size minimizes panel footprint, ideal for densely packed control cabinets.
- High Reliability: Exceptional contact dependability and a mechanical service life of up to 30 million switching cycles (typical).
- Simplified Integration: Integrated 1 NO auxiliary contact reduces complexity and wiring effort.
- IE3/IE4-Ready: Future-proof your system by ensuring compatibility with high-efficiency motor standards.
- Worldwide Usability: Approved according to IEC, UL, and CSA standards for global deployment.
- Secure Connections: Robust screw terminals provide a firm and reliable connection for industrial environments.
- Modular System: Part of the comprehensive SIRIUS modular system, offering easy combination with overload relays (like SIRIUS 3RV2) and other accessories.
Function and Typical Application
The Siemens 3RT2015-1AN21 power contactor is primarily used for switching electrical loads, particularly motors.
- Direct-On-Line (DOL) Motor Starting: Controls the operation of standard 3-phase asynchronous motors up to 3 kW at 400 V.
- Resistive Loads: Suitable for switching heating, lighting, and other resistive loads (up to 18 A at AC-1).
- Industrial Control: Functions as a robust switching element in various automation and control circuits, including conveyors, pumps, fans, and machinery.
- Auxiliary Signaling: The integrated 1 NO auxiliary contact provides positive feedback (Normally Open) for control system monitoring or interlocking circuits.
Installation and Compatibility
The contactor supports both screw and snap-on mounting onto a 35 mm standard DIN rail, ensuring flexible installation. Its compatibility with the SIRIUS 3RV2 overload relay family and other SIRIUS accessories makes it easy to build a complete, factory-tested load feeder assembly.
For more industrial automation products and to complete your load feeder assembly, visit the full range of SIRIUS components at turll.













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