Siemens 3RT2934-5AH21 Magnetic Coil SIRIUS Contactor Replacement Coil, 48V AC 50/60Hz, Size S2, 3RT2.3 Original Brand New

Overview

The Siemens 3RT2934-5AH21 is a high-quality, genuine Siemens SIRIUS component designed as a replacement or spare magnet coil for the SIRIUS 3RT2 series power contactors. Specifically engineered for contactors of Size S2 (part numbers starting with 3RT2.3), this magnetic coil is essential for the electrical control of the contactor, ensuring reliable switching of motors and other loads. It operates on a standard industrial control voltage of 48 V AC.

Benefit

• Restores Contactor Function: Replaces a faulty or worn-out coil, restoring the full operational capability of your expensive Siemens 3RT2 Size S2 contactor.
• Optimal Compatibility: Guaranteed fit and performance with the specified Siemens SIRIUS 3RT2.3 contactors, maintaining the system’s original specifications and safety standards.
• Reliable Performance: Siemens quality ensures a long service life and dependable operation across the specified voltage and frequency range (48 V AC, 50/60 Hz).
• Cost-Effective Repair: Provides a more economical alternative to replacing the entire contactor unit.

Function

The magnetic coil, or solenoid coil, is the main control element in a power contactor. When the specified voltage (48 V AC) is applied across the coil terminals, it generates an electromagnetic field. This field pulls the armature, causing the main power contacts to close and switch the motor or load power ON. When the voltage is removed, the contacts open, switching the power OFF. The 3RT2934-5AH21 is specifically wound to operate efficiently and reliably at 48V AC control power for the larger Size S2 contactors.

Application

This spare part is crucial in industrial automation and control systems, used primarily for maintenance and repair of:

• Power Contactors for motor switching.
• Contactor assemblies in control cabinets.
• Systems requiring 48V AC control voltage.

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