Siemens 3RT2037-1NB34-3MA0 Power Contactor 65A, 30kW, AC/DC Coil, 2NO+2NC, S2 Original Brand New

Overview

The Siemens 3RT2037-1NB34-3MA0 is a high-performance SIRIUS series power contactor designed for reliable switching of electrical loads, particularly in motor control applications. This robust 3-pole contactor is rated for AC-3e/AC-3 operation, handling currents up to 65A and motor power up to 30 kW at 400V. Its versatile 20-33V AC/DC control voltage coil with an integrated varistor ensures compatibility with a wide range of control systems and provides surge protection for the coil. Featuring 2 normally open (NO) and 2 normally closed (NC) captive auxiliary contacts, this contactor offers extensive flexibility for interlocking and signaling purposes. The compact S2 size and user-friendly screw terminals make installation and maintenance straightforward.

Key Benefit

• High Performance: Optimized for AC-3e/AC-3 duty, providing reliable and long-lasting switching for motor and general-purpose loads.
• Versatile Coil: The wide-range 20-33V AC/DC control voltage with an integrated varistor simplifies inventory and offers enhanced protection against voltage spikes.
• Enhanced Functionality: The built-in 2NO + 2NC auxiliary contacts eliminate the need for an external auxiliary switch block, saving space and simplifying wiring.
• Robust Design: Size S2 compact frame and durable construction ensure reliable operation in demanding industrial environments.
• Easy to Install: Screw terminals provide a secure and simple connection method, while the captive auxiliary switch design prevents loss during installation.
• Safety and Compliance: Adheres to international standards, ensuring safe and compliant operation in various applications worldwide.

Technical Functions and Specification

• Product Type: Power Contactor
• Product Number: 3RT2037-1NB34-3MA0
• Series: SIRIUS
• Operational Category: AC-3e / AC-3
• Rated Current (AC-3e/AC-3): 65 A
• Rated Motor Power (400 V): 30 kW
• Number of Poles: 3-pole
• Control Voltage (Us): 20-33 V AC/DC
• Control Frequency: 50/60 Hz
• Coil Features: Integrated varistor for surge suppression
• Auxiliary Contacts: 2 NO + 2 NC (Captive auxiliary switch)
• Terminals: Screw terminals
• Frame Size: S2
• Mounting: DIN rail or screw mounting
• Manufacturer: Siemens

Application

The Siemens 3RT2037-1NB34-3MA0 is the ideal component for a variety of industrial and commercial applications, including:

• Motor Control: Switching and controlling motors in industrial machinery, pumps, and fans.
• Industrial Automation: Integration into control panels and systems for automated processes.
• Heating and Lighting: Controlling high-power heating elements, lighting systems, and other resistive loads.
• General Load Switching: Used in power distribution systems for reliable switching of various electrical loads.

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