Siemens SIRIUS 3RT2024-1AC20 Power Contactor AC-3e/AC-3, 12A, 5.5kW / 400V, 24V AC Coil, Size S0, Screw Terminal Original Brand New

Overview: Siemens SIRIUS 3RT2024-1AC20 Power Contactor

The Siemens 3RT2024-1AC20 is a core component of the SIRIUS modular system, specifically a 3-pole power contactor designed for efficient and reliable switching of motors and other industrial loads up to $5.5\text{ kW}$ at $400\text{ V}$ (AC-3e/AC-3 rating). As a Size S0 contactor, it offers a compact design suitable for space-saving control cabinet construction. This unit is built for global use and is IE3/IE4-ready, making it ideal for controlling modern, highly efficient motors.

Key Technical Specification

• Product Number: 3RT2024-1AC20
• Contactor Series: SIRIUS 3RT2
• Rated Operational Current (AC-3e/AC-3): $12\text{ A}$
• Rated Operational Power (AC-3e/AC-3): $5.5\text{ kW}/400\text{ V}$
• Poles: 3-pole
• Control Supply Voltage: $24\text{ V AC},50/60\text{ Hz}$
• Auxiliary Contacts: $1\text{ NO}+1\text{ NC}$ (Integrated)
• Terminal Type: Screw Terminal
• Size: S0

Benefit

1. High Reliability & Long Life: Part of the robust Siemens SIRIUS family, ensuring high contact reliability and prolonged mechanical service life.
2. Space-Saving Design: The compact Size S0 form factor minimizes panel space requirements.
3. Modular Flexibility: Easily integrates with other SIRIUS components like overload relays (e.g., 3RU21 thermal or 3RB30 electronic) and auxiliary switch blocks for comprehensive motor feeder solutions.
4. Secure Wiring: Features durable screw terminals for a reliable and secure electrical connection.
5. Global Compliance: Approved for worldwide use (e.g., IEC and UL/CSA standards).

Function & Application

The 3RT2024-1AC20 primarily functions as an electromechanical switching device for connecting and disconnecting power to motors. It is suitable for applications such as:

• Standard motor switching (AC-3, AC-3e)
• Industrial machine control
• HVAC systems
• Pump and fan control

Its integrated $1\text{ NO}$ and $1\text{ NC}$ auxiliary contacts allow for simple control circuit integration, providing feedback and interlocking functionality within the automation system. The $24\text{ V AC}$ control coil simplifies integration into low-voltage control circuits.

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