Siemens SIRIUS 3RT1966-5AD31 Changeover Operating Mechanism Coil for 3RT126 Vacuum Contactor, 42-48V AC/DC, Screw Terminal Original Brand New

Product Overview

The Siemens SIRIUS 3RT1966-5AD31 is a genuine, high-quality changeover operating mechanism, also known as a withdrawable coil, designed as a critical spare part for the Siemens SIRIUS 3RT126 Vacuum Contactor series. This essential component ensures reliable and efficient switching operations for your industrial control applications. It is engineered for versatility, supporting both AC (50-60 Hz) and DC control supply voltages in the range of 42 to 48 V. The design incorporates a standard/economy circuit and utilizes screw terminals for robust and secure electrical connections.

Key Product Features & Specification

• Product Number: 3RT1966-5AD31
• Product Brand: Siemens SIRIUS
• Component Type: Changeover Operating Mechanism / Contactor Coil
• Compatibility: Specifically designed for SIRIUS 3RT126 Vacuum Contactors (Size S10)
• Control Voltage: 42-48 V UC (Universal Control, AC/DC)
  • AC (50/60 Hz): 42…48 V
  • DC: 42…48 V
• Operating Mechanism: Standard and Economy Circuit
• Connection Type: Reliable Screw Terminals
• Application: Motor control and switching applications requiring a vacuum contactor.

Benefit

1. Guaranteed Compatibility: As an original Siemens part, the 3RT1966-5AD31 ensures perfect fit and optimal performance with your existing 3RT126 Vacuum Contactor, minimizing downtime and installation issues.
2. Flexible Power Options: The Universal Control (UC) capability allows operation with both AC (50 Hz/60 Hz) and DC voltage sources within the 42-48V range, simplifying inventory and application use.
3. Energy Efficiency: Features an economy circuit, which reduces the holding power consumption after the coil has been energized, leading to lower operating costs and reduced heat generation.
4. Secure Connections: Equipped with reliable screw terminals for a durable and easy-to-maintain electrical connection in demanding industrial environments.

Function

The 3RT1966-5AD31 coil is the heart of the 3RT126 vacuum contactor. When the specified control voltage (42-48V AC or DC) is applied across the screw terminals, the coil generates a magnetic field. This field is responsible for pulling the armature to change the state of the contactor (closing the main power contacts), allowing the flow of high-current power to a motor or load. The changeover mechanism allows for a smooth transition during switching operations, and the economy circuit ensures efficient power use once the contactor is closed.

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