Siemens 3RT2026-1AH20 Power Contactor 25A, 11kW, 48V AC Coil, S0 Size Original Brand New

Overview

The Siemens 3RT2026-1AH20 is a high-performance power contactor designed for switching motors and other resistive loads in industrial control applications. Part of the SIRIUS modular system, this contactor is rated for AC-3e/AC-3 duty, capable of handling a current of 25 A and a motor power of 11 kW at 400 V.

It features a robust 3-pole design and operates with a 48 V AC, 50/60 Hz control supply voltage. The compact S0 size makes it suitable for space-saving installations. The unit includes 1 NO (Normally Open) + 1 NC (Normally Closed) auxiliary contacts integrated for signaling and interlocking, and utilizes reliable screw terminals for secure wiring.

Benefit

• Reliable Performance: High switching capability for motors up to 11 kW, ensuring long-term operational stability.
• Space-Saving Design: The compact S0 size is ideal for installations with limited panel space.
• Integrated Auxiliary Contacts: Features built-in 1 NO + 1 NC contacts, simplifying wiring for control and feedback loops.
• Global Standard Compliance: Suitable for AC-3e/AC-3 applications, meeting essential international standards.
• Secure Connection: Screw terminals offer a time-tested, secure, and easily maintainable wiring connection.

Function

The 3RT2026-1AH20 power contactor serves as an electrically controlled switch for switching 3-phase AC loads. When the 48V AC control voltage is applied to the coil, the main contacts close, connecting the load (e.g., an electric motor) to the power supply.

The integrated auxiliary contacts (1 NO + 1 NC) change state simultaneously, providing feedback on the contactor’s status to the control system (e.g., PLC or relays) or enabling interlocking functions. It is primarily used for starting, stopping, and reversing motors, as well as switching heating systems and lighting loads.

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