Siemens 3RT2038-1KB44 Power Contactor 80A, 37kW DC Coil, S2 Original Brand New

Product Overview

The Siemens 3RT2038-1KB44 is a top-quality, industrial-grade power contactor designed to meet the rigorous demands of modern control systems. Engineered for high performance and reliability, this 3-pole contactor supports up to 80 A and 37 kW at 400 V (AC-3). Featuring a 24V DC coil with a wide control voltage range (0.8–1.2×Uc), it ensures stable operation under varying conditions.

Built with an integrated varistor for voltage spike protection and 2 NO + 2 NC auxiliary contacts, this contactor offers added flexibility in circuit design. The screw terminal connection and removable auxiliary switch make installation and maintenance quick and efficient. Its compact S2 frame size makes it ideal for use in space-constrained panels and is perfectly suited for PLC output controls.

Key Benefit

• High switching capacity: Up to 80A and 37kW at 400V

• Integrated varistor: Protects against voltage surges, increasing equipment lifespan

• Wide voltage range: 24V DC coil with 0.8–1.2×Uc tolerance

• Versatile auxiliary contacts: 2 NO + 2 NC for flexible configurations

• PLC-compatible: Optimized for direct operation with PLC output

• Easy installation: Screw terminal connection and removable auxiliary switch

• Compact design: S2 frame ideal for smaller panels

Function & Application

The Siemens 3RT2038-1KB44 is ideal for switching and controlling motors in industrial automation, HVAC systems, conveyor systems, and other machinery requiring high-current switching. Compatible with AC-3/AC-3e applications, this contactor ensures efficient, safe, and reliable motor control.

Suitable For:

• Industrial control panels

• PLC-controlled systems

• Motor starters

• Automation systems

• Electrical distribution boards

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