Siemens 3RT2037-3NP30 SIRIUS Power Contactor, 65A, 30kW, AC/DC Coil, S2 Size Original Brand New

Overview

The Siemens 3RT2037-3NP30 is a high-performance SIRIUS power contactor engineered for reliable switching of electrical loads up to 65A. As a key component in industrial control systems, this 3-pole contactor is suitable for a wide range of applications, including motor control and other AC-3e/AC-3 duties. Its compact S2 size and versatile 175-280 V AC/DC control voltage make it a flexible solution for modern electrical panels. The integrated varistor provides superior surge protection, extending the life of both the contactor and connected equipment.

Technical Specifications & Key Features

• Product Number: 3RT2037-3NP30
• Contactor Type: Power Contactor
• Operating Current: 65 A (for AC-3e/AC-3, 400 V)
• Rated Power: 30 kW at 400 V
• Number of Poles: 3-pole
• Control Voltage: 175-280 V AC/DC (50/60 Hz) with integrated varistor for surge suppression.
• Auxiliary Contacts: 1 NO (Normally Open) + 1 NC (Normally Closed)
• Main Circuit Connections: Robust screw terminals
• Control & Auxiliary Circuit Connections: Fast and secure spring-loaded terminals
• Size: S2
• Brand: Siemens SIRIUS
• Standard: AC-3e/AC-3

Benefit

• Enhanced Reliability: The integrated varistor protects the coil against voltage spikes, ensuring a long service life and reducing the risk of equipment failure.
• Versatile Power Supply: The wide operating range of 175-280 V AC/DC allows for use in various global applications without needing different coil versions.
• Efficient Installation: The combination of screw terminals for the main circuit and spring-loaded terminals for the control circuit streamlines wiring, saving time and effort during installation.
• Space-Saving Design: The compact S2 size helps to optimize panel space, allowing for higher density installations.
• Broad Application: Ideal for a variety of industrial applications, including motor starting, switching resistive loads, and general purpose control.

Function

The Siemens 3RT2037-3NP30 acts as an electrically operated switch, primarily for remotely controlling power circuits. When the control voltage is applied to the coil (via the 175-280 V AC/DC input), it creates an electromagnetic field that pulls the main contacts together. This action closes the circuit, allowing a high current to flow to the connected load, such as an electric motor. The auxiliary contacts provide feedback or enable interlocking with other components in the control system.

Application

• Motor control and protection
• Heating and lighting circuits
• Switching capacitors
• General industrial automation
• Pump and fan systems
• Compressors and HVAC systems

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