Siemens SIRIUS 3RT2036-3AC20-1AA0 Power Contactor, 51A, 22kW, 24V AC, Spring Terminal, Size S2 Original Brand New

Overview

The Siemens SIRIUS 3RT2036-3AC20-1AA0 is a high-performance, 3-pole Power Contactor from the versatile SIRIUS 3RT2 series, sized S2. Engineered for robust and reliable switching of motors and other industrial loads up to 22 kW (at 400 V) and 51 A in the demanding AC-3e/AC-3 application category.

This model features a standard 24 V AC control voltage for easy integration into control circuits and utilizes a hybrid terminal system: screw terminals for the main circuit and time-saving spring-loaded terminals for the control/auxiliary circuit. Its compact and durable design ensures long-lasting operation in industrial automation and low-voltage control applications.

Key Technical Specification

• Product Number: 3RT2036-3AC20-1AA0
• Product Brand: SIRIUS
• Contactor Type: Power Contactor (Motor Contactor)
• Applicable Category: AC-3e/AC-3
• Current Rating (AC-3e/AC-3): 51 A
• Power Rating (400 V): 22 kW
• Poles: 3-pole main circuit
• Control/Coil Voltage: 24 V AC, 50/60 Hz
• Auxiliary Contacts: 1 NO (Normally Open) + 1 NC (Normally Closed) integrated
• Terminal Type (Main Circuit): Screw Terminal
• Terminal Type (Control/Auxiliary Circuit): Spring-Loaded Terminal
• Contactor Size: S2
• Mounting Position: Upright

Benefits & Advantages

• High Reliability: Part of the established Siemens SIRIUS 3RT2 family, ensuring high contact reliability and a long mechanical service life.
• Hybrid Connection System: Combines the secure connection of screw terminals for high-current main circuits with the fast, vibration-proof wiring of spring-loaded terminals for control circuits.
• Space-Saving Design (Size S2): Offers high switching capacity in a compact, modular form factor, optimizing panel space.
• Global Standard: Suitable and tested for worldwide use, compliant with international standards (e.g., IEC, UL, CSA).
• Integrated Auxiliary Contacts: The built-in 1 NO + 1 NC configuration simplifies wiring and reduces the need for external auxiliary switch blocks.

Typical Function & Application

The 3RT2036-3AC20-1AA0 contactor is primarily used for switching:

• Three-Phase Motors: Start, stop, and reverse AC motors up to 22 kW.
• Heating Loads: Control of resistive loads in industrial heating systems.
• Lighting Circuits: High-current switching in industrial and commercial lighting systems.
• General Load Switching: Control of various non-motor loads in automation systems.

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