3RT2924-5AU21

Description

Overview

The Siemens 3RT2924-5AU21 is a genuine replacement or spare magnetic coil specifically designed for use with the SIRIUS 3RT2 series of power contactors, in particular the Size S0 models: 3RT2023-.A, 3RT2024-.A, and 3RT2025-.A. This essential component, also known as a solenoid coil or magnet coil, is engineered to operate reliably on a 380 V AC control supply voltage at both 50 Hz and 60 Hz frequencies, ensuring compatibility across various international electrical standards. As a critical spare part, the 3RT2924-5AU21 maintains the performance and safety standards of your Siemens control system.

Key Benefit

• Optimized Performance: Designed by Siemens for perfect fit and electrical compatibility with specified 3RT2 contactors, ensuring reliable operation and low typical power loss (7.6 VA).
• Cost-Effective Maintenance: Easily replace a faulty coil without needing to replace the entire contactor, reducing downtime and maintenance costs.
• Global Standard Compatibility: Rated for 380 V AC at both 50 Hz and 60 Hz, making it suitable for a wide range of industrial applications worldwide.
• Genuine Siemens Quality: Manufactured under the SIRIUS brand, guaranteeing the high quality, longevity, and robust performance expected from a Siemens product.
• Quick Restoration: Allows for fast and simple coil exchange, minimizing operational interruptions.

Function

The magnetic coil is the core actuation component of an electromechanical contactor. When the specified control voltage (380 V AC, 50/60 Hz) is applied to the Siemens 3RT2924-5AU21 coil, it generates a magnetic field. This field pulls the armature, causing the contactor’s main and auxiliary contacts to close or open, thereby safely controlling the power supply to a connected load (e.g., a motor). This function is vital for starting, stopping, and controlling electrical circuits in automation and control systems.

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