Siemens 3RT2046-3CB04-3MA0 Power Contactor, 95A, 24V AC, 2NO+2NC Original Brand New

Overview

The Siemens SIRIUS 3RT2046-3CB04-3MA0 Power Contactor is a robust and reliable switching device designed for high-performance motor control and switching resistive loads in industrial applications. This specific model is a 3-pole contactor rated for 95 A (AC-3e/AC-3) and is suitable for motors up to 45 kW at 400 V. It features a 24 V AC, 50 Hz operating coil and comes equipped with a plugged-in varistor for enhanced coil protection against overvoltage spikes. Its Size S3 form factor makes it ideal for integrating into standard industrial enclosures.

Key Features & Technical Specification

• Product Number: 3RT2046-3CB04-3MA0
• Contactor Type: Power Contactor (AC-3e/AC-3)
• Current Rating: 95 A
• Power Rating: 45 kW / 400 V
• Poles: 3-pole
• Control Voltage: 24 V AC, 50 Hz
• Coil Protection: Includes plugged-in varistor
• Auxiliary Contacts: Captive auxiliary switch with $2\text{ NO}+2\text{ NC}$ configuration
• Main Circuit Connection: Screw terminals
• Control/Auxiliary Connection: Spring-loaded terminals (fast and vibration-proof wiring)
• Size: S3 (Standard industrial size)

Benefit

1. High Reliability: Designed as part of the trusted Siemens SIRIUS line, ensuring long operational life and reduced downtime.
2. Fast & Secure Wiring: The innovative spring-loaded terminals for the control and auxiliary circuits allow for quick, tool-free wiring and maintain a strong connection, even under vibration.
3. Surge Protection Included: The integrated plugged-in varistor protects the control coil from damaging voltage peaks, increasing the contactor’s lifespan.
4. Versatile Application: Ideal for switching standard three-phase motors, as well as general resistive loads in heating, lighting, and power distribution systems.
5. Easy Integration: The captive auxiliary switch and standard S3 size simplify mounting and integration into existing control panels.

Function

The primary function of the 3RT2046-3CB04-3MA0 is to provide a reliable, electrically controlled interface for switching high current loads. It is specifically used for:

• Starting and stopping standard $3$-phase electric motors (AC-3e/AC-3 operation).
• Connecting and disconnecting power to electric heating elements, capacitor banks, and lighting systems.
• Serving as a remote switching device in automated industrial control systems.

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