Siemens 3RT2026-1AB00-1AA0 Power Contactor, 25A, 11kW, 24V AC, Size S0 Original Brand New

Overview: Siemens SIRIUS 3RT2 Power Contactor

The Siemens 3RT2026-1AB00-1AA0 is a highly reliable, 3-pole power contactor from the SIRIUS 3RT2 series, designed for switching motors and other resistive loads up to 25 Amps and 11 kW (at 400 V). This compact, Size S0 industrial control component is optimized for AC-3e/AC-3 applications, ensuring efficient and safe operation. It features a low-power 24 V AC, 50 Hz coil for control circuit power and integrated 1 NO + 1 NC auxiliary contacts for signaling and interlocking. Its robust screw terminals ensure secure and straightforward wiring in industrial panels.

Key Features & Technical Specification

• Product Type: Power Contactor, 3-pole
• Manufacturer: Siemens
• Series: SIRIUS 3RT2
• Product Number: 3RT2026-1AB00-1AA0
• Size: S0
• Rated Operational Current (Ie​): 25 A (AC-3e/AC-3 at 400 V)
• Rated Operational Power ($P$): 11 kW (at 400 V)
• Control Supply Voltage: 24 V AC, 50 Hz
• Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC) integrated
• Connection Type: Screw Terminal
• Mounting Position: Upright (standard)

Benefit

• High Reliability: Part of the proven Siemens SIRIUS modular system, guaranteeing long-term operational dependability in demanding industrial environments.
• Space-Saving Design: The compact Size S0 profile minimizes panel space requirements compared to older or alternative models.
• Simplified Wiring: Equipped with user-friendly screw terminals on both the main and auxiliary circuits for quick and secure installation.
• Integrated Monitoring: Built-in 1 NO and 1 NC auxiliary contacts eliminate the need for an external switch block in many common control applications, reducing cost and complexity.
• Global Standard: Complies with modern standards like AC-3e and AC-3, making it suitable for motor control globally.

Function

The Siemens 3RT2026-1AB00-1AA0 functions as an electromechanical switch. When the 24 V AC control voltage is applied to the coil, it generates a magnetic field that closes the three main power contacts, allowing up to 25A of current to flow to the connected load (e.g., an 11 kW motor). Simultaneously, the integrated auxiliary contacts change state (NO closes, NC opens), providing feedback to the control system (e.g., PLC or relays) about the contactor’s operational status. It is primarily used for switching motors, heating equipment, and lighting systems.

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