Siemens 3RT2024-1BM40 SIRIUS 3RT20 Power Contactor 12A, 5.5 kW, 220V DC Coil, Size S0 Original Brand New

Overview

The Siemens 3RT2024-1BM40 Power Contactor from the SIRIUS 3RT20 series is a compact, high-performance switching device essential for motor control and industrial automation applications. This 3-pole contactor is rated for 12 A (AC-3e/AC-3) and a power of 5.5 kW at 400 V, making it ideal for standard motor switching tasks.

It features a reliable 220 V DC operating coil and comes equipped with an integrated 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact for simple control circuit integration. Designed in the compact Size S0 with robust screw terminals, the 3RT2024-1BM40 offers reliable switching, easy wiring, and seamless integration into the modular SIRIUS system.

Technical Specifications

• Product Number: 3RT2024-1BM40
• Manufacturer: Siemens
• Product Family: SIRIUS 3RT20 Power Contactors
• Main Function: Power Contactor for Motor Switching
• Poles: 3-pole
• Rated Operating Current (Ie​): 12 A (at AC-3e/AC-3, 400 V)
• Rated Operational Power (Pe​): 5.5 kW (at AC-3, 400 V)
• Control Supply Voltage (Us​): 220 V DC
• Auxiliary Contacts: Integrated $1\text{ NO}+1\text{ NC}$
• Connection Type: Screw Terminals (main and auxiliary circuits)
• Size: S0
• Standards: IEC, UL/CSA Approved
• Compatibility: Part of the modular Siemens SIRIUS system for easy integration with thermal overload relays (e.g., SIRIUS 3RU2) and other accessories.

Key Benefit

1. High Reliability: Part of the globally proven Siemens SIRIUS family, ensuring long-term operational stability and high contact reliability.
2. Compact Design (Size S0): Saves valuable space within the control cabinet, allowing for higher packing density.
3. Flexible Integration: The built-in $1\text{ NO}+1\text{ NC}$ auxiliary contacts simplify control circuit design, while the modular SIRIUS system offers a standardized range of accessories.
4. Secure Wiring: Robust screw terminals provide a reliable and secure connection for both the main and auxiliary circuits.
5. Worldwide Applicability: IEC and UL/CSA approvals ensure suitability for use in international projects and machinery.
6. Energy Efficiency: DC coil operation often offers reduced holding power, contributing to lower energy consumption in the control circuit.

Application

The Siemens 3RT2024-1BM40 is primarily used for switching 3-phase asynchronous motors and other resistive loads in industrial environments. Typical applications include:

• Starting and stopping electric motors (e.g., pumps, fans, conveyors).
• Switching heating, lighting, and general load circuits.
• Integration into automated control systems (PLCs, motor starters, reversing combinations).

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