Siemens 3RT2037-1NB36 Power Contactor, S2, 65A, 30kW, 20-33V AC/DC Original Brand New

Product Overview

The Siemens 3RT2037-1NB36 Power Contactor from the SIRIUS 3RT2 series is a robust and reliable switching device designed for high-performance motor control applications. Classified as size S2, this 3-pole contactor is rated for $65\text{ A}$ (AC-3e/AC-3) and $30\text{ kW}$ at $400\text{ V}$. Its key feature is the wide-range $20\text{–}33\text{ V}$ AC/DC operating coil with an integrated varistor for surge suppression, ensuring maximum reliability. The unit includes a generous auxiliary contact configuration of $2$ NO (Normally Open) and $2$ NC (Normally Closed) contacts via a lateral auxiliary switch block, and features secure screw terminals for main and auxiliary circuits.

Key Features and Specification

• Product Number: 3RT2037-1NB36
• Series: SIRIUS 3RT2 Power Contactors
• Contactor Size: S2
• Main Current Rating (AC-3e/AC-3): $65\text{ A}$ (at $400\text{ V}$)
• Motor Power Rating: $30\text{ kW}$ (at $400\text{ V}$)
• Poles: 3-pole main circuit
• Control Voltage (Us​): $20\text{–}33\text{ V}$ AC/DC (Wide-range coil)
• Surge Protection: Integrated varistor for coil protection
• Auxiliary Contacts: $2$ NO + $2$ NC (Lateral auxiliary switch block)
• Terminal Type: Screw terminals
• Switching Frequency: $50\text{/60 Hz}$
• Compatibility: IE3/IE4 ready, part of the SIRIUS modular system

Benefit

1. High Reliability: The integrated varistor protects the coil from voltage surges, extending the operational lifespan and minimizing downtime.
2. Flexible Control: The wide-range $20\text{–}33\text{ V}$ AC/DC control voltage simplifies inventory and is highly adaptable to various control systems.
3. Space-Saving Design: As part of the SIRIUS modular system, the compact S2 size offers excellent power density, saving valuable space in control cabinets.
4. Enhanced Signal Capacity: Equipped with $2$ NO and $2$ NC auxiliary contacts, providing ample signaling options for complex interlocking and monitoring circuits without needing external blocks.
5. Robust Connection: Secure and trusted screw terminals ensure reliable and vibration-proof wiring connections for both power and control circuits.

Applications and Functions

The Siemens 3RT2037-1NB36 contactor is primarily used for switching three-phase motors and other electrical loads in demanding industrial environments.

• Motor Switching: Ideal for starting and stopping electric motors up to $30\text{ kW}$ (at $400\text{ V}$).
• Load Switching: Suitable for general resistive and inductive load switching, categorized under AC-3e and AC-3.
• Industrial Automation: Essential component in control panels, machinery, HVAC systems, and conveyor applications.
• Safety Interlocks: The $2$ NO + $2$ NC auxiliary contacts are perfect for feedback signals, circuit interlocks, and connection to PLC or control systems.

For more information on the Siemens 3RT2037-1NB36 and to explore our complete range of industrial automation products, visit turll today!