Siemens 3RT1975-5AV32 SIRIUS Changeover Operating Mechanism for 3RT107, 3RT127, 3RT147 Contactors, 380-420V AC/DC, Spring-type Terminal Original Brand New

Overview

The Siemens 3RT1975-5AV32 is a crucial accessory in the SIRIUS industrial control system, functioning as a high-performance Changeover Operating Mechanism (or solenoid coil/magnet coil) for specific Siemens power contactors. Designed for robustness and versatility, this mechanism ensures reliable switching and control for 3RT107, 3RT127, and 3RT147 contactors (Size S6/S10/S12). It supports dual-voltage AC/DC operation within the range of 380 to 420 Volts (50-60 Hz) and utilizes Spring-type terminals for fast, vibration-proof, and maintenance-free wiring.

Key Features & Specification

• Product: Changeover Operating Mechanism / Contactor Coil
• Siemens Part Number (MPN): 3RT1975-5AV32
• Brand: Siemens SIRIUS
• Application: Compatible with Siemens power contactors 3RT107, 3RT127, 3RT147
• Control Voltage: $380-420\text{V}$ AC ($50/60\text{Hz}$) / DC
• Operating Mechanism: Standard and Economy Circuit (energy-saving mode)
• Connection Type: Spring-type terminal technology for quick and secure installation.
• Function: Enables the electrical switching of the main contacts within the compatible power contactor.

Benefit

• Universal Compatibility: Specifically engineered for a seamless fit and optimal performance with high-current Siemens 3RT1 contactor series (3RT107, 3RT127, 3RT147).
• Flexible Control: True AC/DC operation (380V to 420V) allows for simplified stock-keeping and application in diverse control system environments.
• Energy Efficiency: Features a switchable ‘Economy Circuit’ to reduce holding power consumption once the coil is energized, leading to lower operating costs and reduced heat generation.
• Fast & Secure Wiring: The Spring-type terminal connection guarantees a reliable, gas-tight connection that resists vibration, significantly reducing installation time and eliminating the need for periodic retightening.
• Reliability: As a genuine Siemens SIRIUS component, it ensures long-term operational reliability and performance in demanding industrial applications.

Function

The 3RT1975-5AV32 acts as the solenoid coil for the main contactor unit. When the specified control voltage ($380-420\text{V}$ AC or DC) is applied, it generates a magnetic field that drives the movable contact block, thereby closing the main current path. This mechanism is essential for the remote, electrical operation and control of motors and loads in industrial machinery. The “Changeover” designation highlights its function as a versatile operating component within the contactor structure.

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