Siemens SIRIUS 3RT2026-2NB30 Power Contactor, 25A, 11kW, AC/DC 21-28V Coil, Size S0, Spring-Loaded Terminal Original Brand New

Overview

The Siemens 3RT2026-2NB30 is a high-performance, 3-pole power contactor from the SIRIUS 3RT20 family, specifically engineered for switching motors and general resistive loads up to 25 Amps and 11 kW at 400 V (AC-3e/AC-3). This robust, compact Size S0 contactor offers reliable and safe control in industrial automation applications.

A key feature is its universal wide-range 21-28 V AC/DC (UC) coil with an integrated varistor, which provides superior surge suppression and simplified coil selection, making it ideal for worldwide use in various control voltages. For fast, vibration-proof, and maintenance-free wiring, it utilizes spring-loaded terminals for both the main and auxiliary circuits.

This unit includes 1 Normally Open (NO) and 1 Normally Closed (NC) integrated auxiliary contacts, allowing for direct feedback and interlocking in your control circuit design.

Benefits & Features

• Compact & High Performance (Size S0): Achieves high switching capacity (25A / 11kW) in a small footprint, saving valuable space in the control cabinet.
• Universal Control Voltage (AC/DC Coil): The wide-range 21-28V AC/DC coil simplifies stock-keeping and offers flexibility, ensuring global usability.
• Integrated Varistor: Provides immediate and reliable overvoltage protection for the coil, enhancing system stability and longevity.
• Fast, Secure Wiring: Spring-loaded terminals ensure quick installation, superior contact security, and resistance to vibration compared to traditional screw terminals.
• Reliable Auxiliary Contacts: Equipped with 1 NO and 1 NC contacts for motor status signaling and complex control logic.
• SIRIUS Modular System: Fully compatible and scalable with other SIRIUS components (e.g., overload relays, auxiliary switches) for seamless integration into modern load feeders.
• IE3/IE4 Ready: Optimized for use with high-efficiency IE3 and IE4 motors.

Function

The 3RT2026-2NB30 functions as an electrically controlled switch designed to safely start, stop, and reverse 3-phase AC motors and switch general loads. By applying the 21-28V AC/DC control voltage to the coil, the main contacts close, connecting power to the load. The integrated auxiliary contacts change state to provide feedback to the control system or for interlocking purposes. Its AC/DC operation and integrated varistor make it a highly versatile and robust choice for reliable industrial motor control.

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