3RT2037-3KB44-3MA0
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The Siemens 3RT2037-3KB44-3MA0 is a robust, factory-grade power contactor designed for optimal performance in industrial automation. This 3-pole contactor supports a high current rating of 65 A, making it ideal for switching and controlling electric motors and other heavy loads up to 30 kW at 400 V. Featuring a 24 V DC coil voltage with integrated varistor protection and auxiliary contacts, it ensures reliable operation and enhanced system safety. Its DIN rail mounting style and compact size streamline installation in control panels. Trusted worldwide, this Siemens contactor delivers durability and precision for demanding control applications.
Key Features of Siemens 3RT2037-3KB44-3MA0
- Rated current of 65 A suitable for heavy-duty motor control
- Supports up to 30 kW power at 400 V (AC-3e/AC-3 utilization category)
- 3-pole switching for three-phase power applications
- 24 V DC coil voltage with 0.8-1.2*Uc operating range for stable excitation
- Integrated varistor for surge protection and coil longevity
- Auxiliary contacts: 2 Normally Open (NO) + 2 Normally Closed (NC) for versatile control signaling
- Spring-type terminals (size S2) for secure and easy wiring
- DIN rail mountable for efficient panel integration
- Durable electromechanical design ensuring long service life
Technical Specs of 3RT2037-3KB44-3MA0
Explore Siemens 3RT2037-3KB44-3MA0 specifications to ensure system compatibility before installation.
| Parameter | Specification |
|---|---|
| Rated Operational Current (Ie) | 65 A |
| Power (400 V, AC-3) | 30 kW |
| Number of Poles | 3 |
| Coil Voltage | 24 V DC |
| Auxiliary Contacts | 2 NO + 2 NC |
| Mounting Style | DIN Rail |
| Operating Temperature | -25 °C minimum |
Applications / Use Case
This Siemens 3RT2037-3KB44-3MA0 is commonly used in industrial automation worldwide. It serves critical functions in motor control centers, factory control panels, and conveyor system operations. Its high load switching capacity and auxiliary contact options make it suitable for process control and machine automation where reliability and safety are paramount. The integrated varistor protects equipment from voltage spikes, enhancing system durability in production line systems and heavy machinery environments.
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