Siemens SIRIUS 3RT2327-1BF40 Contactor 4-Pole AC-1, 50A, 110V DC Coil, Screw Terminal, Size S0 Original Brand New

Siemens SIRIUS 3RT2327-1BF40 Power Contactor – Reliable 4-Pole Switching for Non-Inductive Load

The Siemens 3RT2327-1BF40 is a high-performance 4-pole contactor from the renowned SIRIUS 3RT2 series, specifically designed for reliable switching of AC-1 (non-inductive or weakly inductive) loads. With a robust current rating of 50 A at 400 V and 40 °C, this compact Size S0 contactor is an essential component for various industrial control and power distribution applications. Its 110 V DC coil ensures precise and efficient operation, while the integrated 1 NO (normally open) + 1 NC (normally closed) auxiliary contacts provide versatile signaling and interlocking possibilities. Featuring durable screw terminals, the 3RT2327-1BF40 offers secure and straightforward wiring.

Overview

The Siemens 3RT2327-1BF40 contactor adheres to stringent international standards, including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), guaranteeing high quality and reliability. This 4-pole device is perfectly suited for applications such as disconnecting loads, managing power generation plants from the grid, and transfer switching. Its compact design (Size S0) makes it ideal for space-constrained control panels.

Key Function & Features

• 4-Pole AC-1 Switching: Engineered for switching weak or non-inductive loads (AC-1), providing reliable control for resistive heating, lighting, and general power distribution.
• High Current Rating: Handles up to 50 A at 400 V and 40 °C, suitable for demanding applications.
• 110 V DC Coil: Ensures consistent and efficient control operation.
• Integrated Auxiliary Contacts: Comes standard with 1 NO + 1 NC auxiliary contacts for status indication, interlocking, and control circuit integration.
• Screw Terminals: Provides robust and easy-to-wire connections for the main, auxiliary, and control circuits.
• Compact Size S0: Optimized for efficient use of space within control cabinets.
• Standards Compliance: Fully compliant with IEC 60947 series standards for industrial control gear.

Benefit

• Reliable Performance: Built to Siemens’ high-quality standards, ensuring long-term operational stability and safety.
• Versatile Application: Ideal for a wide range of AC-1 switching tasks in industrial and commercial settings.
• Easy Integration: Standardized design and screw terminals facilitate quick and straightforward installation into existing or new systems.
• Enhanced Safety: Designed with robust protection considerations for connections against short circuits, overload, and overvoltage (when paired with suitable protection devices).
• Expandable Functionality: Compatible with various SIRIUS accessories, including surge suppressors, auxiliary switches, and motor protection relays (3RU2 thermal overload relays or 3RB3 electronic overload relays), allowing for customized solutions.
• Cost-Effective: A durable and reliable component that minimizes downtime and maintenance.

Protection of Connections: It is crucial to protect all connections against overload and short circuits. For detailed guidance on protecting main connections (free-standing contactor or in combination with overload relays/circuit breakers) and auxiliary/control supply voltage connections, refer to the technical product data sheet and Siemens configuration manuals. Protection against overvoltage at the control supply voltage connection can be achieved using separately ordered surge suppressors (RC elements, varistors, diodes).

Connection Method:

• Main Circuit: Screw terminals (for 3RT231 and 3RT232 contactors).
• Auxiliary and Control Circuit: Screw terminals.

Electromagnetic Compatibility (EMC): The contactor fulfills requirements for environment category A. When used with frequency converters, observe configuration notes in the Equipment Manual.

Contact Reliability of Auxiliary Contacts: The auxiliary contacts offer high contact reliability, especially suitable for low voltages (≤ 110 V) and currents (≤ 100 mA), as well as solid-state circuits with currents ≥ 1 mA at 17 V and higher.

Motor Protection Compatibility: For overload protection, 3RU2 thermal overload relays or 3RB3 electronic overload relays can be directly mounted onto the 3RT23 contactors.

Operating Mechanism: This 3RT23 contactor version features a conventional DC operating mechanism for reliable switching.

Maintenance & Expandability: The solenoid coil on 3RT23 contactors is replaceable. The basic unit of 3RT232 contactors includes two integrated auxiliary contacts (1 NO + 1 NC) and can be further expanded with additional auxiliary switches.

Accessories and Spare Parts: A wide range of accessories and spare parts are available for 3RT231 to 3RT234 contactors. Consult the SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays accessory guides for more information.

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