Siemens 3RT2037-3NB30 Power Contactor 65A, 30kW, AC/DC Coil, S2 Size Original Brand New

Overview

The Siemens 3RT2037-3NB30 is a high-performance, S2 size power contactor designed for reliable switching of motors and other industrial loads. This robust 3-pole contactor is rated for 65A (AC-3e/AC-3) and capable of handling up to 30 kW at 400 V.

Its innovative design features a universal control voltage range of 20-33 V AC/DC, making it highly versatile for various control systems. The integrated varistor provides superior protection against voltage spikes, ensuring a long operational life. The combination of screw terminals for the main circuit and convenient spring-loaded terminals for the control and auxiliary circuits simplifies installation and wiring.

Key Benefit

• High Performance: Rated for demanding AC-3e/AC-3 applications, handling up to 65A and 30 kW.
• Versatile Control: The wide 20-33 V AC/DC control voltage range eliminates the need for specific AC or DC coils, reducing inventory and simplifying design.
• Enhanced Protection: An integrated varistor protects the coil from harmful voltage surges, extending the contactor’s lifespan and improving system reliability.
• User-Friendly Wiring: Features a dual-terminal system with secure screw terminals for the main power and time-saving spring-loaded terminals for the control and auxiliary circuits.
• Compact & Efficient: As part of the Siemens S2 size family, it offers a high power-to-size ratio, saving valuable panel space.
• Integrated Auxiliary Contacts: Includes one normally open (1 NO) and one normally closed (1 NC) auxiliary contact, allowing for easy integration into control and signaling circuits.

Function

The Siemens 3RT2037-3NB30 contactor’s primary function is to remotely and safely switch a three-phase electrical circuit. It is typically used in motor control applications, including:

• Starting and stopping electric motors.
• Switching resistive and inductive loads.
• Control of lighting, heating, and other industrial equipment.
• Acting as a component in a motor starter or control panel.

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