Siemens 3RT1965-5AU32 Changeover Operating Mechanism 240-277V UC Original Brand New

Overview

The Siemens 3RT1965-5AU32 is a high-performance Changeover Operating Mechanism (Coil) designed specifically for use with SIRIUS 3RT106 and 3RT146 power contactors (Size S10). This critical accessory enables the switching function of the main contactor. Engineered for maximum flexibility, it supports both AC (50…60 Hz) and DC operation, making it a universal solution for diverse control applications. The coil operates reliably across a wide control supply voltage range of 240 V to 277 V UC (Universal Circuit).

Benefit

1. Universal AC/DC Operation: The broad voltage range ($240\text{ V}-277\text{ V}$) and dual AC/DC compatibility minimize inventory complexity and simplify procurement, offering maximum flexibility in system design.
2. Energy Efficiency: Features a selectable Economy Circuit option, allowing for reduced holding power after the contactor has pulled in, leading to lower energy consumption and less heat generation in the panel.
3. Secure and Fast Wiring: Utilizes robust Spring-type terminals (Cage Clamp) for vibration-proof and maintenance-free connections, significantly reducing wiring time compared to screw terminals.
4. Reliable Performance: As an original Siemens SIRIUS component, the coil ensures long-term operational reliability and seamless integration with 3RT1 series contactors.
5. Easy Replacement: Designed as a withdrawable component for size S10 contactors, allowing for quick and hassle-free replacement or voltage changes without disturbing the main wiring.

Function 

The 3RT1965-5AU32 coil acts as the electromagnetic actuator for the compatible contactors (3RT106, 3RT146). When the control voltage ($240\text{ V}-277\text{ V}$ AC/DC) is applied to the coil terminals, it generates a magnetic field. This field pulls in the contactor armature, closing the main power contacts and thus switching the electrical load (e.g., a motor or resistive load). The “Changeover” designation confirms its role in the contactor’s switching mechanism.

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