Overview
The Siemens 3RT2924-5AH21 is a high-quality magnetic coil designed to operate with a variety of Siemens Sirius 3RT2 contactors. This coil provides the necessary electromagnetic force to actuate the main contacts of a contactor, enabling it to switch electrical loads on and off.
With a 48 V AC operating voltage at a frequency of 50/60 Hz, it’s engineered for reliability and long-term performance in industrial automation and control systems. It’s the ideal replacement or spare part for contactors in the 3RT2023, 3RT2024, and 3RT2025 series.
Key Features & Benefit
- Optimal Compatibility: Specifically designed for a seamless fit with Siemens Sirius 3RT2023, 3RT2024, and 3RT2025 contactors, ensuring reliable performance and easy installation.
- Efficient Operation: The 48 V AC operating voltage is a common standard in many industrial applications, providing efficient power consumption.
- Durable Design: Constructed to meet Siemens’ high-quality standards, the coil offers long service life and dependable operation in demanding environments.
- Versatile Application: Suitable for a wide range of industrial control circuits, motor control, and automation tasks.
Function
The magnetic coil is the heart of an electromagnetic contactor. When voltage is applied to the coil’s terminals, it creates a magnetic field. This field pulls a movable armature, which is mechanically linked to the contactor’s main contacts. The movement of the armature closes the contacts, allowing current to flow to the connected load.
When the voltage is removed, the magnetic field collapses, and a spring returns the armature to its original position, opening the contacts and stopping the current flow. The Siemens 3RT2924-5AH21 coil performs this essential function with precision and reliability.













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