Siemens 3RT2046-3AN20 Power Contactor, 95A, 220V AC Coil, SIRIUS S3 Original Brand New

Overview

The Siemens 3RT2046-3AN20 is a high-performance, 3-pole SIRIUS 3RT2 Power Contactor designed for the reliable switching of motors up to 45 kW at $400\text{ V}$. Part of the modular SIRIUS control system, this size S3 contactor is engineered for use in demanding industrial motor control applications.

It adheres to the latest efficiency standards, including the enhanced $\text{AC-3e}/\text{AC-3}$ switching category. The unit features robust screw terminals for the main power circuit and user-friendly spring-loaded terminals for the control and auxiliary circuits, ensuring fast and vibration-proof wiring.

Key Technical Specification

• Product Number: 3RT2046-3AN20
• Series: Siemens SIRIUS 3RT2
• Size: S3
• Poles: 3-pole
• Rated Operating Current (Ie): $95\text{ A}$ (at $\text{AC-3e}/\text{AC-3},400\text{ V}$)
• Rated Power (Pe): $45\text{ kW}$ (at $\text{AC-3e}/\text{AC-3},400\text{ V}$)
• Control Supply Voltage (Coil): $220\text{ V AC},50/60\text{ Hz}$
• Auxiliary Contacts: $1\text{ NO}+1\text{ NC}$ (Integrated)
• Main Circuit Terminals: Screw terminals
• Control/Auxiliary Terminals: Spring-loaded terminals

Benefit

1. High Reliability & Power: Rated at $95\text{ A}$ and $45\text{ kW}$, it is perfectly suited for heavy-duty motor switching, offering long-term operational stability.
2. Fast, Secure Wiring: The combination of screw terminals for the high-current main circuit and spring-loaded terminals for control wiring drastically reduces installation time and maintenance, ensuring secure, vibration-resistant connections.
3. Future-Proof Efficiency: Compliant with both $\text{AC-3}$ and the improved $\text{AC-3e}$ standards, guaranteeing efficiency and conformity for modern IE3/IE4 motor applications.
4. Integrated Flexibility: Includes built-in $1\text{ NO}+1\text{ NC}$ auxiliary contacts, minimizing the need for external components and simplifying circuit design.
5. Modular System Integration: As a SIRIUS 3RT2 component, it seamlessly integrates with other Siemens control gear (e.g., overload relays, auxiliary blocks) for compact and efficient panel design.

Function

The 3RT2046-3AN20 power contactor is primarily used for switching 3-phase AC loads, particularly electric motors, in industrial control panels. It functions by using the $220\text{ V AC}$ control voltage to energize the coil, which closes the main poles to supply power to the motor. The integrated auxiliary contacts provide immediate feedback on the contactor’s switching status for interlocking and control logic. The size S3 design ensures robust performance and durability in demanding operational environments.

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