Siemens SIRIUS 3RT2327-2BM40 AC-1 Contactor 50A, 4-Pole, 220V DC Coil, Spring-Loaded, Size S0 Original Brand New

Siemens SIRIUS 3RT2327-2BM40 AC-1 Contactor – Reliable Switching for Non-Inductive Load

The Siemens SIRIUS 3RT2327-2BM40 is a high-performance 4-pole AC-1 contactor, engineered for reliable switching of weak or non-inductive loads. Designed for industrial applications, this robust contactor offers a 50 A current rating at 400 V / 40 °C, ensuring stable operation in demanding environments. Featuring a 220 V DC coil for efficient control and integrated 1 NO + 1 NC auxiliary contacts, it provides essential feedback and control capabilities. The innovative spring-loaded terminals simplify wiring, reduce installation time, and offer enhanced vibration resistance, making it an ideal choice for various control panel setups.

Overview

The Siemens 3RT2327-2BM40 is part of the renowned SIRIUS 3RT2 contactor series, known for its compact design, high contact reliability, and long service life. This specific model, sized S0, is a versatile component for applications requiring dependable switching of resistive loads, heating circuits, or power distribution in industrial and commercial settings. Its adherence to international standards like IEC 60947 ensures global compatibility and performance.

Key Features & Function

• 4-Pole AC-1 Contactor: Designed for switching alternating current circuits with non-inductive or slightly inductive loads, such as resistance furnaces, heating systems, and distribution boards.
• High Current Rating: Rated at 50 Amperes for AC-1 applications at 400 V / 40 °C, providing ample capacity for various load types.
• 220 V DC Coil: Ensures precise and energy-efficient control with a direct current operating mechanism.
• Integrated Auxiliary Contacts (1 NO + 1 NC): Provides immediate feedback on contactor status and allows for complex control circuits, suitable for solid-state circuits with low currents and voltages (e.g., $\le 110V$, $\le 100mA$).
• Spring-Loaded Terminals: Offers quick, tool-free wiring, exceptional vibration resistance, and consistent contact pressure, reducing maintenance needs.
• Compact Size S0: Optimizes panel space utilization, ideal for densely packed control cabinets.
• Robust Construction: Built to withstand demanding industrial conditions, ensuring long-term reliability.
• Standards Compliance: Meets stringent international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, guaranteeing safety and performance.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, ensuring reliable operation in industrial electromagnetic environments.

Benefit

• Enhanced Reliability: Siemens’ proven engineering ensures consistent and safe operation for critical applications.
• Reduced Installation Time: Spring-loaded terminals significantly cut down wiring effort and complexity.
• Space-Saving Design: Compact S0 size allows for more efficient use of cabinet space.
• Versatile Application: Ideal for a wide range of non-inductive load switching, load disconnection, and transfer switching tasks.
• Simplified Maintenance: Designed for durability with replaceable solenoid coils (for 3RT233 only), reducing downtime and service costs.
• Scalable Control: Easily expandable with additional auxiliary switches to meet evolving control circuit needs.
• Comprehensive Protection Options: Integrates seamlessly with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for robust motor protection.
• Global Standard Compliance: Ensures compatibility and acceptance in international markets.

Application

The Siemens 3RT2327-2BM40 contactor is ideally suited for:

• Four-pole switching of weak or non-inductive loads (AC-1)
• Disconnecting loads or power generation plants from the grid
• Transfer switching applications
• Resistive heating circuits
• Lighting control systems
• Distribution board applications
• General industrial control circuits

Protection & Safety:

All connections of the Siemens 3RT2327-2BM40 must be protected against overload and short circuits using appropriate measures. Refer to the technical product data sheet and relevant configuration manuals for detailed information on short-circuit and overload protection of main, auxiliary, and control supply voltage connections. Overvoltage protection at the control supply voltage connection can be achieved by retrofitting with suitable surge suppressors (RC elements, varistors, diodes) available as accessories.

Connection Methods:

• Main Circuit: Features convenient spring-loaded terminals for secure and rapid connection.
• Auxiliary and Control Circuit: Equipped with reliable screw terminals for flexible wiring.

Motor Protection Compatibility:

For comprehensive motor protection, the 3RT2327-2BM40 can be easily combined with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays, mounting directly onto the contactor.

Accessories & Spare Parts:

A wide range of accessories and spare parts are available for the SIRIUS 3RT2 contactors, including additional auxiliary switches, surge suppressors, and replacement solenoid coils, allowing for customization and extended operational life.

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