Siemens 3RT2036-1KB40 Power Contactor S2 Frame, 51A, 22kW, 24V DC with Varistor Original Brand New

Overview

The Siemens 3RT2036-1KB40 is a robust and efficient power contactor designed for a wide range of industrial applications. Part of the SIRIUS family, this contactor is built for high performance and reliability in demanding environments.

It’s suitable for AC-3e/AC-3 switching of motors, ensuring seamless operation. The compact S2 frame size makes it an ideal solution for space-constrained installations, while its screw terminals ensure a secure and straightforward electrical connection.

Key Features & Benefit

• High Performance: With a current rating of 51 A and a power rating of 22 kW at 400 V, this contactor is well-equipped to handle significant loads.
• Integrated Protection: The built-in varistor provides essential surge suppression, protecting the coil from voltage spikes and extending the contactor’s lifespan, especially when used with sensitive control systems like PLCs.
• Versatile Control: Operates with a 24 V DC control voltage, making it perfect for use with standard PLC outputs. The wide control range of 0.8-1.2*Uc ensures reliable switching even with minor voltage fluctuations.
• Auxiliary Contacts: Includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, allowing for flexible integration into control circuits for status indication or interlocks.
• Durable Design: The robust 3-pole design and S2 frame size guarantee long-term durability and stable performance in industrial settings.

Function

The Siemens 3RT2036-1KB40 power contactor functions as an electrically operated switch used for switching a power circuit. When a 24 V DC control signal is applied to its coil, it closes the main power contacts, allowing current to flow to the connected load (e.g., an electric motor).

When the control signal is removed, the contacts open, interrupting the power circuit. The integrated varistor protects the coil by absorbing transient overvoltages, which are common when switching inductive loads.

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