Siemens SIRIUS 3RT2015-2QB42 Power Contactor 7A, 3kW (400V), 24V DC Coil, 1NC, Spring Terminal, Size S00 Original Brand New

Overview

The Siemens SIRIUS 3RT2015-2QB42 is a high-performance, 3-pole power contactor from the trusted SIRIUS modular system. Designed for switching motors and other resistive loads, this compact device belongs to the Size S00 frame, ensuring a space-saving installation.

Key Technical Detail

• Product Number: 3RT2015-2QB42 (or 3RT20152QB42)
• Contactor Type: Power Contactor (Motor Contactor)
• Series: SIRIUS 3RT20
• Operating Performance (AC-3e/AC-3): 7 A
• Rated Power (AC-3e/AC-3): 3 kW at 400 V
• Number of Poles: 3-pole
• Control/Coil Voltage: 24 V DC (Direct Current)
• Control Voltage Range: 0.7−1.25×Uc​
• Surge Suppression: Integrated Varistor plugged on for coil protection against voltage spikes.
• Auxiliary Contacts: 1 NC (Normally Closed) integrated auxiliary contact.
• Terminal Type: Spring-loaded terminals (Spring Clamp) for fast, vibration-proof, and maintenance-free wiring of the main circuit, auxiliary circuit, and control circuit.
• Frame Size: S00
• Compatibility Note: No additional auxiliary switch can be added (fixed configuration).

Key Benefit

• Space-Saving Design: Frame size S00 provides a compact solution for tight control cabinet spaces.
• Reliable Switching: Part of the SIRIUS family, known for high contact reliability and prolonged endurance.
• Vibration-Proof Connection: Spring-loaded terminals ensure a secure, maintenance-free, and robust connection, ideal for applications subject to vibration.
• DC Coil Protection: Integrated varistor provides effective surge suppression, protecting the coil and extending the contactor’s service life, especially when controlled by PLCs or sensitive electronics.
• Globally Certified: Complies with all major standards and certificates (IEC, UL/CSA, IE3/IE4 ready).
• Direct Control Compatibility: The 24V DC coil is perfectly suited for modern PLC outputs.

Function and Application

The 3RT2015-2QB42 functions as a robust electromechanical switching device primarily used for switching 3-phase motors (AC-3 duty) and for controlling other electrical loads (AC-1 duty, e.g., heating, lighting).

Application

• Control of industrial motors (up to 3 kW / 400 V)
• Switching of resistive loads
• Integration into automated industrial machinery and control systems
• Use in applications requiring a fast and simple wiring method via spring terminals.

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