Siemens SIRIUS 3RT2046-3KB40 Power Contactor, Size S3, 95A, 45kW, 24V DC, with Integrated Varistor Original Brand New

Overview

The Siemens SIRIUS 3RT2046-3KB40 is a high-performance, 3-pole power contactor designed for reliable and efficient switching of electrical loads. Part of the renowned SIRIUS 3RT2 series, this contactor is engineered for industrial applications requiring robust performance and seamless integration into control systems.

Its compact S3 frame size makes it ideal for space-saving installations, while advanced features like an integrated varistor and dual-circuit terminals ensure both safety and ease of use. This model is particularly well-suited for automation tasks, including direct control from PLC outputs.

Key Features & Function

• High Power Rating: Capable of handling up to 95 A (AC-3e/AC-3) and 45 kW at 400 V, making it suitable for a wide range of demanding motor and general-purpose load applications.
• Integrated Varistor: The built-in varistor provides surge suppression for the control coil, protecting sensitive electronics and extending the lifespan of the contactor and connected components.
• Versatile Auxiliary Contacts: Features 1 NO (Normally Open) and 1 NC (Normally Closed) auxiliary contact, offering flexibility for signaling, interlocking, and control circuit feedback.
• Dual-Terminal Technology: The main circuit utilizes reliable screw terminals for secure power connections, while the control and auxiliary circuits feature convenient spring-loaded terminals, providing fast, vibration-proof wiring.
• 24V DC Coil: The 24 V DC control voltage is a standard for many industrial automation systems, ensuring compatibility with PLC outputs and control relays. The wide operating range of 0.8-1.2*Uc accommodates voltage fluctuations.
• Frame Size S3: The compact S3 frame size optimizes panel space without compromising on power capacity.
• Suitable for PLC Outputs: The low-power consumption and integrated varistor make this contactor an excellent choice for direct connection to PLC digital outputs, simplifying wiring and reducing the need for intermediate relays.

Benefit

• Enhanced Reliability: The integrated varistor protects the coil from damaging voltage spikes, leading to a longer operational life and reduced maintenance.
• Space Efficiency: The S3 frame size allows for higher density installations in control cabinets, saving valuable panel space.
• Simplified Wiring: Spring-loaded terminals on the control side enable quick, tool-free wiring, reducing installation time and labor costs.
• Broad Application Range: Ideal for controlling motors, heaters, lighting systems, and other heavy industrial loads in various sectors, from manufacturing to building automation.
• Seamless Integration: Designed for compatibility with the entire Siemens SIRIUS modular system, allowing for easy expansion and combination with other components like motor starters, overload relays, and circuit breakers.

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