Siemens SIRIUS 3RT2026-2KA40 Power Contactor 25A, 11kW, 12V DC, S0 Frame Original Brand New

Overview

The Siemens SIRIUS 3RT2026-2KA40 is a high-performance 3-pole power contactor designed for robust motor control applications. Part of the trusted SIRIUS line, this S0 frame size contactor offers a powerful combination of efficiency and reliability. With a rated operational current of 25 A for AC-3e/AC-3, and a power rating of 11 kW at 400 V, it is perfectly suited for controlling standard three-phase motors. The 12V DC coil, with a wide control voltage range of 0.7 to 1.25*Uc, ensures compatibility with low-voltage control circuits and is specifically designed for integration with PLC outputs.

Key Features & Benefit

• High Performance: Rated for AC-3e/AC-3 applications with a 25 A current and 11 kW power, providing reliable switching for demanding motor loads.
• PLC Compatibility: The low-voltage 12V DC coil and suitable design make it a perfect fit for direct connection to PLC outputs, simplifying your control system wiring.
• Integrated Protection: Comes with a plugged-in varistor for surge suppression, protecting the coil and the control circuit from voltage spikes and prolonging the device's lifespan.
• Space-Saving Design: The compact S0 frame size allows for efficient panel layout and space utilization in control cabinets.
• Convenient Wiring: Equipped with spring-loaded terminals for fast, secure, and vibration-resistant connections. This "no-tools" approach saves installation time and ensures a reliable electrical connection.
• Built-in Auxiliary Contacts: Features one normally open (1 NO) and one normally closed (1 NC) auxiliary contact, providing immediate feedback on the contactor's status for interlocking and signaling purposes.

Function

The Siemens 3RT2026-2KA40 power contactor serves as an electrically operated switch used for switching an electric power circuit. When the 12V DC coil is energized (via a PLC output or another control signal), the main contacts close, allowing power to flow to the connected load (e.g., an electric motor).

Simultaneously, the auxiliary contacts change state, providing a signal that can be used by a PLC or other control system to confirm the status of the contactor. The integrated varistor protects the coil from back-EMF surges when the coil is de-energized, making it a reliable component in any automation system.

Technical Specification

• Product: Power Contactor
• Series: SIRIUS 3RT2
• Product Number: 3RT2026-2KA40
• Rated Current (AC-3e/AC-3): 25 A
• Power Rating (AC-3): 11 kW @ 400 V
• Number of Poles: 3
• Coil Voltage: 12 V DC
• Control Voltage Range: 0.7 - 1.25 * Uc
• Auxiliary Contacts: 1 NO + 1 NC
• Terminal Type: Spring-loaded
• Frame Size: S0
• Special Features: Plugged-in varistor, suitable for PLC outputs, no auxiliary switch can be added

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