Siemens SIRIUS 3RT2037-3KB44-3MA0 Power Contactor 65A, 30kW, 24V DC Control Original Brand New

Overview

The Siemens SIRIUS 3RT2037-3KB44-3MA0 is a high-performance power contactor designed for reliable switching of motors and other electrical loads up to 65A. This 3-pole contactor is engineered for demanding industrial applications, offering exceptional durability and a compact, space-saving design. Its advanced features, including an integrated varistor and a wide control voltage range, make it a perfect solution for modern automation systems.

Key Features & Benefit

• High-Power Capability: Rated for 65 A and 30 kW at 400 V, it’s ideal for a wide range of industrial motor control applications.
• Versatile Control: Operates on a 24 V DC control voltage, making it compatible with most modern PLC systems. The integrated varistor provides surge protection for sensitive PLC outputs.
• Enhanced Reliability: The integrated varistor protects against voltage spikes, extending the life of both the contactor and the control circuitry.
• Flexible Connections: Features screw terminals for the main power circuit for robust, high-current connections, and spring-loaded terminals for the control and auxiliary circuits for fast, vibration-proof wiring.
• Comprehensive Auxiliary Contacts: Includes 2 NO (Normally Open) and 2 NC (Normally Closed) auxiliary contacts, allowing for flexible integration into complex control and feedback loops.
• Space-Saving Design: Part of the compact SIRIUS 3RT2 series, this S2 frame size contactor helps optimize panel space.
• Captive Auxiliary Switch: Ensures the auxiliary switch remains with the main unit, simplifying installation and maintenance.

Function

The Siemens 3RT2037-3KB44-3MA0 power contactor serves as a crucial component in electrical control systems. Its primary functions include:

• Switching: Efficiently and safely switches electrical power to motors, heaters, lighting, and other loads.
• Control: Allows for remote or automated on/off control of electrical circuits.
• Protection: The integrated varistor protects the control circuit from transient voltage spikes.
• Feedback: The built-in auxiliary contacts provide status feedback to PLCs and other control systems.

Technical Specification

• Product Number: 3RT2037-3KB44-3MA0
• Product Type: Power Contactor
• Operating Current: 65 A (AC-3e/AC-3)
• Rated Power: 30 kW @ 400 V
• Poles: 3-pole
• Control Voltage: 24 V DC (0.8-1.2 * Uc)
• Auxiliary Contacts: 2 NO + 2 NC
• Terminals (Main Circuit): Screw Terminals
• Terminals (Control/Auxiliary): Spring-loaded Terminals
• Frame Size: S2
• Special Features: Integrated varistor, suitable for PLC outputs, captive auxiliary switch

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