Siemens 3RT2015-2HB42 SIRIUS Power Contactor, 7A, 3kW, 24V DC Coil, Size S00, Spring-Loaded Terminal Original Brand New

Overview

The Siemens 3RT2015-2HB42 is a compact, high-performance SIRIUS 3RT20 Power Contactor designed for switching motors and general loads up to 7 A (AC-3e/AC-3) and 3 kW / 400 V. This 3-pole contactor features a reliable 24 V DC coil with an extended operating range (0.7−1.25×Uc​), making it an ideal choice for direct integration with PLC outputs in modern automation systems. It utilizes secure, vibration-proof spring-loaded terminals for fast and maintenance-free wiring. Its compact Size S00 design ensures space-saving installation in control cabinets.

Benefits & Key Features

• PLC Compatibility: Equipped with a 24V DC coil and an extended operating voltage range, this contactor is specifically suitable for direct connection to PLC outputs, reducing the need for intermediate relays.
• Maintenance-Free Wiring: The spring-loaded terminal technology offers a secure, gas-tight connection that is highly resistant to vibration, significantly reducing maintenance time and ensuring long-term reliability.
• Space-Saving Design: Its Size S00 frame is one of the most compact designs available, optimizing valuable space within control panels and electrical enclosures.
• High Performance: Rated for up to 7A switching current for motor loads (AC-3e/AC-3) up to 3kW at 400V.
• Integrated Auxiliary Contact: Comes standard with 1 NC auxiliary contact, providing essential feedback for control circuit monitoring and interlocking.

Function

The Siemens 3RT2015-2HB42 functions as a magnetic switch (contactor) designed to safely and reliably switch electrical loads, primarily three-phase motors. When the $24\text{ V DC}$ control voltage is applied to the coil, it generates a magnetic field that closes the three main contacts, allowing power to flow to the motor. The integrated $1\text{ NC}$ auxiliary contact changes its state (from closed to open) when the main contacts are closed, providing a signal to the control system (like a PLC) about the contactor’s operational status.