3RT2038-1NB30 | Siemens 3-Pole 80A Power Contactor with Varistor and Auxiliary Contacts

Description 

The Siemens 3RT2038-1NB30 is a 3-pole power contactor rated for 80 A and 37 kW at 400 V AC, designed for reliable motor and load switching in industrial control applications. It features a 20–33 V AC/DC coil, integrated varistor protection, and auxiliary contacts (1 NO + 1 NC) for control circuit versatility.

Technical Specifications 

Information About 3RT2038-1NB30

The Siemens 3RT2038-1NB30 belongs to the 3RT20 series of modular contactors, widely used in industrial automation and motor control applications. It supports heavy-duty AC-3 switching up to 80 A or 37 kW at 400 V, providing robust operation for motor starting, load switching, and power management. Designed with an integrated varistor, the contactor protects the control circuit against voltage spikes, improving system longevity. The combination of 1 NO and 1 NC auxiliary contacts enables flexible control and signaling, while screw terminals ensure secure connections. Its compact S2 frame and multi-mount design allow easy installation in both DIN rail and panel configurations.

Key Features:

• High Power Switching Performance: Rated for 80 A and 37 kW at 400 V AC under AC-3 utilization, allowing it to handle large motors and heavy inductive loads with consistent reliability.
• Three-Pole Main Contacts: Equipped with 3 normally open contacts providing stable current conduction and long electrical endurance even under high inrush conditions.
• Integrated Varistor Protection: Includes a built-in surge suppression device that limits transient voltage peaks, extending the lifespan of the contactor coil and connected electronics.
• Dual-Voltage Coil (20–33 V AC/DC): Offers installation flexibility by supporting both alternating and direct current control signals without the need for different coil versions.
• Auxiliary Contacts (1 NO + 1 NC): Facilitate auxiliary control, status feedback, or interlocking functions, enhancing system control logic and safety.
• Rugged Industrial Design: Constructed from high-strength, heat-resistant materials, ensuring mechanical durability and consistent performance in harsh operating environments.
• Flexible Mounting Options: Designed for quick installation on DIN rails or direct panel mounting, simplifying integration in control cabinets and switchgear assemblies.
• Wide Operating Temperature Range: Functions reliably from -25°C to +60°C, making it suitable for both indoor and outdoor industrial use.
• High Electrical and Mechanical Endurance: Engineered to perform millions of switching operations with minimal maintenance requirements.
• Safety and Compliance: Meets IEC and EN standards for industrial contactors, ensuring global usability and compliance with automation system requirements.

The 3RT2038-1NB30 delivers the reliability and precision required for demanding industrial motor control applications, providing safe, efficient, and long-lasting switching performance across a wide range of automation systems.