Siemens 3RT2037-1AD04 SIRIUS Power Contactor, 65A, 30kW, 400V, 3-Pole, Size S2, 42V AC Coil, 2 NO + 2 NC Aux Contacts, Screw Terminal Original Brand New

Overview: Siemens 3RT2037-1AD04 SIRIUS Power Contactor

The Siemens 3RT2037-1AD04 is a robust, high-performance 3-pole power contactor from the globally recognized SIRIUS 3RT2 series. It is specifically designed for reliable and efficient switching of three-phase motors and other resistive loads in industrial control and automation systems.

This contactor is rated for a high operational current of 65 A (AC-3e/AC-3) and a power of 30 kW at $400\text{ V}$. Its compact Size S2 design saves valuable space in control cabinets. It operates with a 42 V AC, 50 Hz control supply voltage, making it suitable for specific low-voltage control applications.

Benefit

• High Performance: Safely and reliably switches motors up to 30 kW, ensuring long-term operational stability.
• Space-Saving Design: The compact Size S2 frame allows for high power density in electrical panels, optimizing cabinet footprint.
• Integrated Control: Features a pre-installed $2\mathbf{NO}+2\mathbf{NC}$ auxiliary switch block, simplifying wiring for control and signaling functions like interlocking. The auxiliary block is removable for flexible configuration.
• Robust Connection: Reliable screw terminals guarantee a secure and durable electrical connection for both the main and auxiliary circuits.
• Global Standard: Part of the modular SIRIUS system, ensuring compatibility with a wide range of accessories (e.g., overload relays, timers) and worldwide approvals.

Function and Application

The Siemens 3RT2037-1AD04 functions as an electromechanical switching device used to control the flow of electrical power to a load, most commonly an electric motor.

Typical Applications Include:

• Switching 3-phase AC motors (Direct-on-Line (DOL) starters).
• Controlling pumps, fans, compressors, and conveyor systems.
• Switching heating elements and lighting loads (AC-1 application).
• Integration into complex control systems with PLC or relay logic.

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