Siemens 3RT2327-1AL20 Contactor 4-Pole AC-1, 50A, 230V AC, S0 Size, Screw Terminal Original Brand New

Overview

The Siemens 3RT2327-1AL20 is a high-performance 4-pole contactor from the renowned SIRIUS 3RT2 series, engineered for robust AC-1 applications. This contactor is ideal for switching non-inductive or weakly inductive loads, making it a crucial component in various industrial power and control circuits. With a current rating of 50A (at 400V / 40°C) and a 230V AC operating mechanism, it offers reliable performance for a wide range of applications, including disconnecting loads, power generation plant integration, and transfer switching.

Built to Siemens’ stringent quality standards, the 3RT2327-1AL20 ensures long-term durability and operational efficiency. It features an integrated 1 NO (normally open) and 1 NC (normally closed) auxiliary contact for flexible control circuit integration, and secure screw terminals for straightforward wiring. Its compact S0 size allows for efficient panel space utilization.

Key Benefit

• Reliable AC-1 Switching: Optimized for switching non-inductive or weakly inductive loads, ensuring stable and safe operation in demanding environments.
• High Current Capacity: Handles up to 50A at 400V, suitable for medium-power applications.
• Integrated Auxiliary Contacts: Includes 1 NO + 1 NC auxiliary contacts for enhanced control and signaling capabilities, reducing the need for additional components.
• Robust Screw Terminals: Provides secure and reliable electrical connections, simplifying installation and maintenance.
• Compact S0 Size: Space-saving design for efficient integration into control panels and enclosures.
• Global Standards Compliance: Manufactured to meet IEC 60947 standards, ensuring compatibility and safety in international applications.
• Flexible Control: Operates with a standard 230V AC (50/60 Hz) control voltage.
• Expandable: Supports additional auxiliary switches for increased functionality as per application requirements.

Functions & Features

• 4-Pole Design: Enables multi-phase switching of loads.
• AC-1 Application Specific: Specifically designed and rated for resistive or weakly inductive loads.
• Rated Current: 50 A (at 400 V / 40 °C).
• Control Supply Voltage: 230 V AC, 50/60 Hz.
• Auxiliary Contacts: 1 NO (Normally Open) + 1 NC (Normally Closed) integrated into the basic unit.
• Terminal Type: Screw terminals for main, auxiliary, and control circuits.
• Size: S0.
• Standards Compliance: Conforms to IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches).
• Overvoltage Protection: Can be retrofitted with surge suppressors (RC elements, varistors, diodes) for coil damping (accessories sold separately). 3RT13 versions feature integrated varistor damping.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A.
• Contact Reliability: Auxiliary contacts are highly reliable, especially suitable for solid-state circuits with low voltages and currents.
• Motor Protection Integration: Compatible with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection when combined with appropriate motor-rated contactors (note: 3RT2327-1AL20 is AC-1 rated).
• Operating Mechanism: Conventional AC operating mechanism. Solenoid coil replacement is possible for 3RT23 contactors; contacts for 3RT233 only.
• Expandability: All basic units can be expanded with auxiliary switches, ensuring flexible adaptation to application needs.
• Accessories & Spare Parts: A wide range of accessories and spare parts are available for the SIRIUS 3RT2 series, allowing for customization and maintenance.

Application

The Siemens 3RT2327-1AL20 contactor is ideally suited for a variety of industrial and commercial applications that require reliable 4-pole switching of non-inductive or weakly inductive loads (AC-1), including:

• Resistive Heating Systems: Controlling heating elements in industrial furnaces, ovens, or climate control systems.
• Lighting Circuits: Switching large lighting installations.
• Capacitor Banks: Switching capacitor banks for power factor correction.
• Isolation Applications: Disconnecting loads or power generation plants from the grid.
• Transfer Switching: Used in power transfer applications where non-inductive loads are involved.
• General Industrial Control: As a general-purpose switching device for various non-motor loads.

Note: For switching motor-driven loads (AC-3), please refer to special versions of the 3RT23 contactors specifically designed for motor control.

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