Siemens 3RT2024-2AC20 Power Contactor SIRIUS 3RT2, 12A, 5.5kW, 24V AC, Spring-Loaded, S0 Original Brand New

Overview

The Siemens 3RT2024-2AC20 Power Contactor from the SIRIUS 3RT2 series is a high-performance, compact switching device engineered for reliable motor control applications. Rated for AC-3e/AC-3, 12 A (5.5 kW at 400 V), this 3-pole contactor is designed for demanding industrial environments. It features a low-power, standard 24 V AC control coil and incorporates modern spring-loaded terminals for fast, vibration-proof, and maintenance-free wiring. As a Size S0 device, it is fully compatible with the modular SIRIUS system.

Key Technical Specifications 

• Product ID: 3RT2024-2AC20
• Product Series: SIRIUS 3RT2
• Contactor Size: S0
• Rated Operational Current (AC-3/AC-3e): 12 A
• Rated Operational Power: 5.5 kW at 400 V
• Number of Poles: 3-pole
• Control Supply Voltage (Coil): 24 V AC, 50/60 Hz
• Main Circuit Connection: Spring-loaded terminal
• Auxiliary Contacts: 1 NO (Normally Open) + 1 NC (Normally Closed)
• Replaces: 3RT1024-3AC20 (Include older model number for users searching for replacements)

Benefits and Features

High Reliability with Spring-Loaded Technology

The innovative spring-loaded terminal connections ensure a permanent, gas-tight connection that is resistant to vibration and shock, eliminating the need for periodic re-tightening common with screw terminals. This significantly reduces maintenance time and enhances operational reliability in critical applications.

Compact and Modular SIRIUS System Integration

As a Size S0 component of the SIRIUS modular system, the 3RT2024-2AC20 allows for seamless integration and simple assembly with coordinated devices like overload relays (e.g., SIRIUS 3RV2) and other function modules. Its compact design saves valuable space within the control cabinet.

Worldwide Application and Compliance

This contactor is approved for global use, meeting critical standards such as IEC and UL/CSA. It is also IE3/IE4-ready, making it suitable for modern, energy-efficient motor applications worldwide.

Integrated Auxiliary Contacts

The inclusion of 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact provides immediate feedback and control signal integration, simplifying circuit design and reducing the need for external auxiliary switch blocks.

Function / Typical Application

The Siemens 3RT2024-2AC20 Power Contactor is primarily used for switching motors and general resistive loads in industrial and commercial installations. Typical applications include:

• Starting and stopping 3-phase AC motors (up to 5.5 kW / 400 V).
• Switching heating, lighting, and ventilation systems.
• Serving as a main or feeder contactor in complex control panels.
• Use in applications requiring a secure, vibration-resistant electrical connection.

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