Siemens 3RT2037-3AL20 SIRIUS Power Contactor, 65A, 30kW, 230V AC, S2 Original Brand New

Overview: Siemens 3RT2037-3AL20 SIRIUS Power Contactor, Size S2

The Siemens 3RT2037-3AL20 power contactor is a high-performance switching device from the advanced SIRIUS 3RT2 product line, specifically engineered for switching motors up to 30 kW at 400 V (AC-3e/AC-3). This robust, 3-pole contactor is rated for 65 A operational current and features a reliable 230 V AC (50/60 Hz) control coil voltage.

Part of the flexible SIRIUS modular system, the 3RT2037-3AL20 ensures optimal performance in a compact, space-saving Size S2 design. It is built for a wide range of industrial control applications, offering high contact reliability and worldwide approvals (IEC, UL/CSA).

Benefits & Advantages

• IE3/IE4 Ready: Optimized for reliable switching of high-efficiency motors, supporting modern energy standards (AC-3e utilization category).
• Space-Saving Design: The compact Size S2 construction allows for high packing density in control cabinets.
• Dual Connection Technology: Combines screw terminals for the main circuit with spring-loaded terminals for control/auxiliary wiring, ensuring quick, maintenance-free, and vibration-resistant connections.
• High Reliability: Engineered by Siemens SIRIUS for outstanding contact reliability and a long mechanical service life.
• Integrated Auxiliary Contacts: The built-in 1 NO + 1 NC auxiliary contacts simplify engineering and reduce setup complexity.
• Modular System: Fully compatible with the standardized SIRIUS system accessories (auxiliary switches, releases, etc.) and infeed system, minimizing wiring effort.

Function & Application

The Siemens 3RT2037-3AL20 power contactor is primarily used for:

1. Switching 3-Phase Motors: Ideal for starting, stopping, and reversing three-phase asynchronous motors in industrial machinery, pumps, fans, and conveyor systems.
2. General Resistive Loads: Can also switch general AC loads up to 80 A (AC-1, 400V).
3. Industrial Controls: A fundamental component in motor starter combinations and various complex control circuits requiring a reliable, high-current switching solution.

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