Siemens SIRIUS 3RT2037-3CL24-3MA0 Power Contactor, 65A, 30kW, 400V, 230V AC Coil, Size S2, Spring-Loaded Terminals Original Brand New

Overview

The Siemens SIRIUS 3RT2037-3CL24-3MA0 is a high-performance, 3-pole power contactor from the SIRIUS 3RT2 family, specifically engineered for switching motors up to 30 kW at 400 V (AC-3e/AC-3). This robust contactor offers a rated operational current of 65 A.

It is characterized by its compact Size S2 design, a control supply voltage of 230 V AC (50/60 Hz), and integrated protection against coil surges via a plugged-in varistor. A key feature for fast, reliable wiring in control cabinets is the combination of screw terminals for the main circuit and spring-loaded terminals for the control and auxiliary circuits.

Benefit

• High Reliability & Longevity: Part of the globally proven Siemens SIRIUS modular system, ensuring high-contact reliability and a long mechanical service life.
• Space-Saving Design: The compact Size S2 frame contributes to a smaller, more organized control cabinet footprint.
• Integrated Protection: Includes a factory-fitted plugged-in varistor to protect the coil and adjacent electronic components from switching surges.
• Flexible and Fast Wiring: Features the combined advantage of robust screw terminals for the power lines and time-saving, vibration-proof spring-loaded terminals (spring-type) for control wiring.
• Enhanced Control: Comes with a captive auxiliary switch block (2 NO + 2 NC), providing extra signaling and interlocking capabilities right out of the box.

Function

The Siemens 3RT2037-3CL24-3MA0 power contactor is primarily used for switching electric motors and resistive loads in industrial control and automation applications. When the 230 V AC control voltage is applied to the coil, the three main power contacts close, allowing power to flow to the motor or load.

The integrated auxiliary contacts (2 NO + 2 NC) provide simultaneous feedback to the control system (e.g., a PLC) for status monitoring and interlocking functions. The built-in varistor suppresses transient overvoltages when the coil circuit is de-energized, protecting the control system.

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