Siemens 3RT2934-5AD21 Magnet Coil 42V AC, 50/60 Hz for SIRIUS 3RT2.3 Contactors, Size S2 Original Brand New

Overview

The Siemens 3RT2934-5AD21 is a genuine replacement magnet coil designed for the SIRIUS 3RT2 series of power contactors, specifically for Size S2 models (e.g., 3RT2.3.-.A). This essential control component is rated for an operating voltage of 42 V AC at a standard frequency of 50/60 Hz. It provides the reliable electromagnetic force required to operate and maintain the contactor’s main contacts in a closed position for crucial motor control and switching applications.

Key Benefit

• Optimal Performance: Designed by Siemens to factory specifications, ensuring perfect compatibility and reliable switching cycles for your 3RT2 contactors.
• Reduced Downtime: Quick and straightforward replacement allows for rapid repair of a faulty coil, minimizing system downtime.
• Cost-Effective Repair: Replace only the coil rather than the entire contactor, significantly lowering maintenance costs.
• Durability: Built to the high-quality standards of the SIRIUS industrial control line for long service life in demanding environments.

Function

The 3RT2934-5AD21 magnetic coil is the core actuating element of the contactor. When the rated 42V AC control voltage is applied, it generates a magnetic field that pulls the armature, closing the main contacts and allowing current to flow to the load (e.g., a motor). Removing the voltage de-energizes the coil, and the contacts open, safely isolating the load.

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