Siemens 3RT2026-1NB30 SIRIUS 3RT2 Power Contactor 25A, 11kW, 400V, 3-Pole, AC/DC 21-28V Coil, Size S0 Original Brand New

Overview

The Siemens 3RT2026-1NB30 is a high-performance, compact 3-pole power contactor from the SIRIUS 3RT2 family, designed for switching motors and other resistive loads in industrial control systems. Rated for AC-3e/AC-3 up to 25 A and a power output of 11 kW at 400 V, this contactor is a reliable and efficient component for your low-voltage industrial control applications. Its hybrid AC/DC control coil (21-28 V AC/DC) with an integrated varistor ensures high operational reliability and excellent surge protection.

Key Features and Specifications

• Product ID: 3RT2026-1NB30
• Product Type: Power Contactor / Motor Contactor
• Brand/Series: Siemens SIRIUS 3RT2
• Operational Current (AC-3e/AC-3): 25 A
• Motor Power (400V): 11 kW
• Number of Poles: 3-Pole Main Contacts
• Control Coil Voltage: 21-28 V AC/DC (50/60 Hz) – Universal Coil
• Surge Protection: Integrated Varistor
• Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)
• Terminal Type: Screw Terminals (Main and Auxiliary Circuits)
• Size: S0
• Standard Compliance: IE3/IE4 Ready, approved for worldwide use (e.g., IEC and UL/CSA).

Benefit

1. High Reliability: Part of the modular SIRIUS system, offering high contact reliability and robust performance for demanding motor switching tasks.
2. Compact, Space-Saving Design (Size S0): Achieves convincing performance from a small footprint, optimizing panel space.
3. Flexible Control Voltage: The wide-range 21-28V AC/DC coil simplifies inventory and maintenance, offering flexibility in control circuit design.
4. Integrated Surge Protection: The built-in varistor protects the coil and control system from voltage spikes, increasing the lifespan and reliability of the device and associated components.
5. Easy Installation and Wiring: Features user-friendly screw terminals for secure connection and integrated auxiliary contacts (1NO + 1NC) to reduce wiring complexity.
6. Worldwide Approved: Suitable for use in systems and machinery destined for global markets.

Function and Application

The SIRIUS 3RT2026-1NB30 power contactor is primarily used for switching motors (on/off control) and other electrical loads (such as heating or lighting) within industrial automation, HVAC, pumping systems, and machine building. It serves as the main switching element in a motor starter or motor feeder, often in combination with an overload relay (e.g., SIRIUS 3RU2). The 3-pole design is standard for switching three-phase AC motors. The integrated auxiliary contacts provide status feedback and interlocks for the control circuit.

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