Siemens 3RT1975-5AU31 Changeover Operating Mechanism (Coil), 240-277V AC/DC, for 3RT107/3RT147 Contactors, Screw Terminal Original Brand New

Overview

The Siemens 3RT1975-5AU31 is a high-performance changeover operating mechanism (often referred to as a coil or solenoid) designed as an essential accessory for the SIRIUS series 3RT107 and 3RT147 power contactors. This component is crucial for activating and deactivating the main contacts within the contactor, ensuring reliable switching operations in industrial motor control applications. It supports a wide control voltage range of 240 to 277 V for both AC (50/60 Hz) and DC operation, offering exceptional versatility and simplified inventory management.

Function

As the primary solenoid, the 3RT1975-5AU31 converts electrical energy from the control circuit into mechanical force to move the contactor’s armature. This motion directly controls the opening and closing of the main power contacts.

• AC/DC Versatility: The universal AC/DC operation capability ensures the coil can be used in diverse control systems without needing separate parts for AC or DC power.
• Standard/Economy Circuit: It utilizes a high-efficiency design that allows for both standard pull-in operation and a reduced holding current (economy circuit) to minimize continuous power consumption and heat generation once the contactor is closed.
• Reliable Switching: Guarantees precise and reliable switching cycles for high-current loads, critical for motor starting and control.

Benefit

1. Broad Voltage Compatibility: Operates reliably across a 240 V to 277 V control voltage range, minimizing the risk of incorrect coil installation.
2. Energy Efficient: The integrated standard/economy circuit reduces continuous power consumption, lowering operational costs and heat dissipation in the control panel.
3. High Reliability: Manufactured by Siemens, a leader in industrial automation, ensuring high quality, long service life, and adherence to international standards.
4. Secure Connections: Features robust screw terminals for simple, secure, and reliable wiring connections.
5. Easy Maintenance: Designed as a readily replaceable component, simplifying maintenance and reducing downtime for the associated contactor.

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