Siemens 3RT2015-2KA42 SIRIUS Power Contactor, 7A, 3kW, 12V DC, 1NC, Spring Original Brand New

Overview: Siemens 3RT2015-2KA42 SIRIUS Power Contactor

The Siemens 3RT2015-2KA42 is a compact, high-performance 3-pole power contactor from the trusted SIRIUS 3RT20 series, specifically designed for switching motors and other electrical loads in industrial control systems. With its low-power 12 V DC coil and integrated suppressor diode, it is perfectly suited for direct and reliable operation with PLC outputs.

This contactor features a rated operational current of 7 A (AC-3e/AC-3) and a maximum motor power rating of 3 kW at 400 V. The spring-loaded terminals ensure fast, vibration-proof, and maintenance-free wiring, making installation efficient. As a space-saving device, it is built in the compact Frame Size S00 and includes one integrated Normally Closed (1 NC) auxiliary contact for signaling.

Benefit

• PLC Optimized: The low-power 12 V DC coil and built-in suppressor diode enable direct and reliable switching by Programmable Logic Controller (PLC) digital outputs, simplifying your control circuit design.
• Space & Cost Efficient: Compact Frame Size S00 design saves valuable panel space while offering high performance for motor applications up to 3 kW.
• Reliable Wiring: Spring-loaded terminals offer high contact reliability, significantly reducing wiring time and preventing connection failures due to vibration.
• High Performance: Part of the trusted Siemens SIRIUS modular system, ensuring high contact reliability and robust performance across a wide range of ambient conditions.

Function

The Siemens 3RT2015-2KA42 acts as an electromechanical switching device used to remotely control the flow of electrical power to loads, typically electric motors. When the 12 V DC control voltage is applied to the coil, the three main power contacts close, connecting the load to the power supply. The integrated 1 NC auxiliary contact changes state (opens) simultaneously, providing a feedback signal for the control system. The built-in suppressor diode protects the PLC output from voltage spikes (back EMF) that occur when the coil is de-energized.

Application

This contactor is ideal for a wide range of industrial control and automation applications, including:

• Switching of small 3-phase AC motors (up to 3 kW / 400 V).
• Integration into control circuits where space is limited.
• Direct interface with low-power DC PLC outputs (12V DC supply).
• Switching resistive loads (AC-1 duty).
• Use in machinery, conveyor systems, pumps, and fans.

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