Siemens 3RT2027-2KG40 Power Contactor 32A, 15kW, 125V DC Coil with Varistor, Spring-Loaded Terminal Original Brand New

Overview

The Siemens 3RT2027-2KG40 is a high-performance SIRIUS power contactor designed for reliable and efficient switching of AC motors. As part of the Siemens SIRIUS modular system, this contactor offers a compact S0 frame size, making it ideal for space-constrained industrial applications. With a rated operational current of 32 A for AC-3e/AC-3 motor loads at 400 V and a power rating of 15 kW, it provides robust performance for a wide range of tasks.

This model is particularly suited for use with PLC outputs due to its integrated 125 V DC coil and a wide operating range of 0.7-1.25*Uc. The built-in varistor provides excellent surge protection, enhancing the longevity of both the contactor and the control system.

Key Features & Benefit

• High Performance: Rated for 32 A and 15 kW at 400 V, providing reliable motor control.
• PLC Compatibility: The 125 V DC coil and its specific operating range make it perfectly suited for direct connection to PLC outputs.
• Integrated Surge Protection: A plugged-in varistor protects the coil from voltage spikes, ensuring a longer service life and greater system reliability.
• Space-Saving Design: Its compact S0 frame size allows for efficient panel layout and installation in tight spaces.
• Quick and Secure Wiring: Spring-loaded terminals offer a fast, vibration-proof, and maintenance-free connection, significantly reducing installation time.
• Integrated Auxiliary Contacts: Features one normally open (1 NO) and one normally closed (1 NC) auxiliary contact, providing essential feedback and control signals without the need for additional modules.

Function

The Siemens 3RT2027-2KG40 power contactor is a crucial component in industrial automation and motor control circuits. Its primary function is to switch electrical power to motors and other inductive loads. When the 125 V DC control voltage is applied to the coil, the main contacts close, allowing current to flow to the motor. The integrated auxiliary contacts change state simultaneously, providing signals to a PLC, HMI, or other control systems to indicate the status of the contactor (e.g., motor running/stopped). The spring-loaded terminals ensure a reliable electrical connection, even in environments with vibration. The integrated varistor absorbs harmful voltage surges, protecting the control circuit from damage.

Technical Specification

• Product Number: Siemens 3RT2027-2KG40
• Type: Power Contactor
• Rated Operational Current (AC-3e/AC-3): 32 A
• Rated Power: 15 kW at 400 V
• Poles: 3-pole
• Coil Voltage: 125 V DC
• Coil Operating Range: 0.7 – 1.25 * Uc
• Varistor: Plugged-in
• Auxiliary Contacts: 1 NO + 1 NC
• Terminal Type: Spring-loaded terminal
• Frame Size: S0
• Additional Features: Suitable for PLC outputs; no auxiliary switch can be added.

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