Siemens 3RT2037-1KB44-3MA0 Power Contactor 65A, 30kW, 3-Pole, 24V DC Original Brand New

Overview

The Siemens 3RT2037-1KB44-3MA0 Power Contactor is a high-performance industrial switching device designed for reliable motor and load control. Part of the trusted SIRIUS 3RT2 series, this 3-pole contactor delivers outstanding efficiency, durability, and integration flexibility, making it ideal for automation systems, control panels, and PLC applications.

Key Features & Specification

• Model Number: 3RT2037-1KB44-3MA0

• Rated Operational Current (AC-3): 65 A

• Power Rating: 30 kW at 400 V

• Poles: 3-pole

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

• Auxiliary Contacts: 2 Normally Open (NO) + 2 Normally Closed (NC)

• Integrated Varistor: Yes (for protection against voltage surges)

• Terminal Type: Screw terminal

• Frame Size: S2

• Captive Auxiliary Switch: Included

• Suitable for: PLC outputs and automation control systems

Benefit

• Enhanced Safety: Integrated varistor provides protection against voltage spikes and surges.
• High Reliability: Built for continuous industrial use with robust materials and precision engineering.
• Easy Installation: Screw terminals and compact S2 frame size ensure simple integration into existing systems.
• Flexible Control: Ideal for motor and load switching in automation and PLC-based setups.
• Energy Efficiency: Optimized contact system for reduced energy consumption and long operational life.

Function & Application

The Siemens 3RT2037-1KB44-3MA0 is engineered for use in:

• Motor control and protection circuits

• Industrial automation and process control

• HVAC systems

• Conveyor and machinery control

• Electrical panels and distribution boards

It functions as a reliable power contactor that enables safe and efficient switching of electrical loads up to 65A and 30kW, ensuring stable operation in demanding environments.

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