Siemens 3RT2047-3SB30 SIRIUS Power Contactor, S3, 110A, 55kW, 21-33V AC/DC, Spring-Loaded Terminal Original Brand New

Overview & Key Specification

The Siemens 3RT2047-3SB30 Power Contactor from the renowned SIRIUS 3RT2 family is an advanced, high-performance switching device designed for demanding industrial motor and circuit control applications. This robust 3-pole contactor is rated for operation up to 110 A (AC-3e/AC-3) and a power rating of 55 kW at $400V$.

It features a wide-range control voltage of 21-33 V AC/DC, making it highly versatile for various control systems, and includes an integrated varistor for superior coil surge suppression. The main circuit uses reliable screw terminals, while the control and auxiliary circuits utilize time-saving spring-loaded terminals. This S3 size contactor is specifically designated with F-PLC-IN for use in safety-oriented or fail-safe applications, often interfacing with F-PLCs.

Benefit

• High Performance: Safely switches motors up to 55 kW (110A), ensuring reliable power control in heavy-duty applications.
• Enhanced Reliability: The integrated varistor protects the control circuit from voltage spikes, extending the contactor’s lifespan and reducing downtime.
• Flexible Control: The wide-range 21-33 V AC/DC coil voltage simplifies inventory and allows for easy integration into various low-voltage control schemes, including those powered directly by a safety PLC output (F-PLC-IN).
• Fast, Secure Wiring: Spring-loaded terminals on the control and auxiliary circuits drastically reduce wiring time and ensure a vibration-proof, maintenance-free connection.
• Space-Saving Design: Its compact Size S3 form factor allows for efficient panel design and installation.
• Safety Integration: The F-PLC-IN designation confirms suitability for fail-safe applications, providing an extra layer of system integrity.

Function & Application

The 3RT2047-3SB30 serves as the primary switching element for high-current loads, specifically:

• Motor Control: Starting, stopping, and reversing (in conjunction with another contactor) 3-phase AC motors in industrial machinery.
• Load Switching: Controlling high-power resistive and inductive loads, such as heating elements or large lighting systems.
• Safety Circuits: Used as a final switching element in fail-safe control loops, leveraging its F-PLC-IN compatibility.

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