Siemens 3RT2038-3KB40 Power Contactor, 80A 37kW 400V, 3-Pole, 24V DC, Motor Control Contactor Original Brand New

Overview

The Siemens 3RT2038-3KB40 Power Contactor is a high-quality and reliable switching device designed for demanding industrial applications. With a rated operational current of 80 A and a power capacity of 37 kW at 400 V, this 3-pole contactor ensures efficient and safe control of electric motors and other heavy loads. Engineered by Siemens for maximum performance, it is ideal for automation systems and PLC-controlled environments.

Key Features & Technical Specification

• Model Number: 3RT2038-3KB40

• Type: Power Contactor

• Rated Operational Current (AC-3e/AC-3): 80 A

• Power Rating: 37 kW / 400 V

• Poles: 3-Pole

• Control Voltage: 24 V DC (0.8–1.2 × Uc)

• Integrated Varistor: Yes (for surge protection)

• Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)

• Main Circuit Connection: Screw terminal

• Control & Auxiliary Circuit Connection: Spring-loaded terminal

• Frame Size: S2

• Suitable For: PLC outputs and automated control systems

• Brand: Siemens

Benefit

• High Efficiency: Designed to handle heavy-duty motor loads with minimal power loss.
• Reliable Operation: Integrated varistor provides effective surge suppression, increasing lifespan and stability.
• Easy Installation: Screw terminals for main circuit and spring-loaded terminals for auxiliary/control circuits simplify wiring.
• PLC Compatibility: Optimized for seamless integration with PLC outputs in modern control systems.
• Durable Design: Built to Siemens’ strict quality standards for long-term performance and reliability.

Application

• Industrial automation systems

• Motor control centers

• Conveyor and material handling systems

• HVAC systems and compressors

• Pump control and power distribution units

Function

The Siemens 3RT2038-3KB40 serves as an electromechanical switch for controlling and protecting electric motors. It efficiently handles frequent switching operations and provides safe disconnection under load conditions. Its integrated varistor safeguards sensitive electronics from voltage spikes, ensuring stable control even in high-demand environments.

For more of our industrial automation products, visit turll today!