Siemens 3RT2047-3NB34-3MA0 Power Contactor S3, 110A, 55kW, 20-33V AC/DC Original Brand New

Overview: Siemens SIRIUS 3RT2 Power Contactor

The Siemens 3RT2047-3NB34-3MA0 is a high-performance, 3-pole SIRIUS 3RT2 power contactor designed for reliable switching of motors and other industrial loads up to 55 kW / 400 V. As part of the Siemens SIRIUS modular system, this size S3 contactor offers robust functionality and flexibility for low-voltage power distribution and motor control applications.

Key Technical Specification

• Product Number: 3RT2047-3NB34-3MA0
• Product Type: Power Contactor (Motor Switching)
• Contactor Size: S3
• Rated Operational Current (AC-3e/AC-3): 110 A
• Rated Power (400 V): 55 kW
• Poles: 3-pole
• Control Voltage (Coil): 20-33 V AC/DC, 50/60 Hz
• Coil Protection: Integrated varistor
• Auxiliary Contacts: 2 NO (Normally Open) + 2 NC (Normally Closed) – captive switch
• Main Circuit Connection: Screw terminal
• Control/Auxiliary Circuit Connection: Spring-loaded terminal (Push-in technology)

Features & Function

1. High Power Switching: Rated for 110 A (AC-3e/AC-3) and capable of switching 55 kW at 400 V, making it suitable for heavy-duty motor applications.
2. Flexible Control: Features a wide-range control voltage (20-33 V AC/DC), simplifying inventory and compatibility across various control schemes.
3. Integrated Surge Protection: The built-in varistor protects the coil against voltage peaks, enhancing the lifespan and reliability of the contactor.
4. Dual Connection System:
   • Main Circuit: Robust screw terminals for secure high-current connections.
   • Control Circuit: Fast and reliable spring-loaded terminals (push-in) for vibration-proof wiring of auxiliary and control circuits, reducing installation time.
5. Comprehensive Auxiliary Contacts: Equipped with a captive 2 NO + 2 NC auxiliary switch block for seamless integration into interlocking, signaling, and control circuits.
6. Compact Design: Size S3 is optimized for space efficiency in control cabinets while maintaining high current ratings.

Benefit

• Reduced Wiring Time: Spring-loaded terminals on the control side allow for quick, tool-free wiring, significantly speeding up panel assembly.
• Enhanced Reliability: The integrated varistor minimizes control circuit failures due to surges, ensuring stable operation.
• Global Standard Compliance: Certified for use in various industrial applications worldwide, adhering to AC-3e/AC-3 standards.
• Vibration Resistance: The spring-loaded connection technology provides a stable, long-lasting connection, ideal for environments with high vibration.
• Compatibility: Seamlessly integrates with other components in the Siemens SIRIUS modular system.

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