Siemens 3RT2346-1AV00 Contactor 4-Pole, AC-1, 140A, 400V, S3 Size with 1NO+1NC Aux Contact Original Brand New

Siemens 3RT2346-1AV00 Contactor: High-Performance 4-Pole AC-1 Switching Solution

Product Overview: The Siemens 3RT2346-1AV00 is a robust and reliable 4-pole contactor, specifically designed for switching AC-1 category loads, such as resistive or non-inductive loads. Rated for 140 A at 400 V and 40 °C, this Size S3 contactor operates on a 400 V AC, 50 Hz control supply voltage. It comes equipped with integrated 1 NO (normally open) + 1 NC (normally closed) auxiliary contacts and features secure screw terminals for straightforward installation. Part of the SIRIUS 3RT2 series, this contactor adheres to stringent international standards, including IEC 60947, ensuring high performance and safety in industrial applications.

Key Benefit

• Reliable AC-1 Switching: Optimized for switching weak or non-inductive loads, ensuring stable and efficient operation.
• High Current Capacity: Handles up to 140 A (at 400 V / 40 °C), suitable for demanding applications.
• Integrated Auxiliary Contacts: Comes with 1 NO + 1 NC auxiliary contacts for versatile control circuit integration and signaling.
• Robust & Durable: Built to Siemens’ high-quality standards, ensuring a long operational life and consistent performance.
• Easy Installation: Features dependable screw terminals for secure and convenient wiring.
• Compact Size S3: Efficient design for space-saving integration within control panels and systems.
• Enhanced Safety: Complies with essential IEC standards for device protection and electromagnetic compatibility.
• Expandable Functionality: Supports additional auxiliary switches and surge suppressors for tailored control solutions.

Functions & Features

• AC-1 Application: Ideal for four-pole switching of resistive and non-inductive loads, disconnecting loads, or power generation plants from the grid, and transfer switching.
• Main Circuit Protection: Requires external short-circuit and overload protection; consult technical data sheet or configuration manuals for detailed guidance on device combinations (e.g., with overload relays or circuit breakers).
• Auxiliary & Control Circuit Protection: Protection considerations include suitable power supply selection (current-limiting) and coordination with other switching elements.
• Overvoltage Protection: Can be retrofitted with external surge suppressors (RC elements, varistors, diodes) for coil damping, extending coil life and preventing damage from opening surges.
• Connection Methods: Main circuit utilizes screw terminals with box terminals; auxiliary and control circuits also use screw terminals for secure connections.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, ensuring reliable operation in industrial settings.
• Contact Reliability: Auxiliary contacts are designed for high contact reliability, even at low voltages (≤ 110 V) and currents (≤ 100 mA), suitable for solid-state circuits.
• Motor Protection Integration: Compatible with SIRIUS 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection.
• Operating Mechanism: Features a conventional AC operating mechanism (400 V AC, 50 Hz).
• Maintenance: Solenoid coil replacement is possible; contacts for 3RT234 contactors can also be replaced.
• Auxiliary Switch Expansion: The basic unit includes integrated auxiliary contacts (1 NO + 1 NC) and can be further expanded with additional auxiliary switches.

Standards & Compliance:

• IEC 60947-1
• IEC 60947-4-1
• IEC 60947-5-1 (auxiliary switches)

Application

• Control of heating elements and lighting systems.
• Switching non-inductive resistive loads in industrial processes.
• Power distribution and circuit isolation.
• Integration into load feeders for various industrial machinery.

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