Siemens 3RT2316-1BW40 Contactor 4-Pole, AC-1, 18A, 48V DC, Screw Terminal, Size S00 Original Brand New

Siemens 3RT2316-1BW40 Contactor: 4-Pole AC-1 Power Switching Solution

Overview

The Siemens 3RT2316-1BW40 is a high-performance 4-pole contactor from the renowned SIRIUS 3RT2 series, specifically designed for AC-1 applications. This robust industrial component is ideal for reliably switching weak or non-inductive loads up to 18A at 400V/40°C. Featuring a 48V DC operating mechanism and convenient screw terminals, this compact S00 size contactor offers exceptional reliability and flexibility for various control panel and industrial automation setups. Engineered to meet stringent international standards like IEC 60947, it ensures safe and efficient operation in diverse environments.

Key Features & Specifications

• Product Number: 3RT2316-1BW40
• Contactor Type: AC-1 (suitable for weak or non-inductive loads)
• Rated Operational Current (AC-1): 18 A at 400 V / 40 °C
• Number of Poles: 4-pole
• Control Supply Voltage: 48 V DC
• Connection Method: Screw terminals
• Size: S00
• Integrated Auxiliary Contact: 1 NO (Normally Open)

Benefit

• Reliable Performance: Built to Siemens’ high-quality standards, ensuring long-term stable operation in demanding industrial environments.
• Versatile Application: Perfect for general-purpose switching of resistive loads, heating systems, lighting circuits, and isolation of power generation plants.
• Space-Saving Design: The compact S00 size allows for efficient panel layout and optimization of cabinet space.
• Easy Installation: Screw terminals provide a secure and straightforward connection method.
• Enhanced Safety: Conforms to international standards (IEC 60947), offering peace of mind regarding electrical safety and performance.
• Integrated Auxiliary Contact: The built-in 1 NO auxiliary contact provides additional signaling or control capabilities without requiring extra components.
• Overvoltage Protection Ready: Can be retrofitted with surge suppressors (RC elements, varistors, diodes) for enhanced coil protection (accessories sold separately).

Function

The Siemens 3RT2316-1BW40 contactor serves as a crucial switching device in electrical circuits, performing the following core functions:

• Switching Non-Inductive Loads (AC-1): Effectively switches resistive loads such as heating elements, lighting, and power distribution systems.
• Disconnecting Loads from Grid: Provides a reliable means to isolate equipment or power generation units from the main electrical supply.
• Transfer Switching: Can be utilized in applications requiring transfer between different power sources.
• Control Circuit Integration: Its 48V DC coil allows for seamless integration into various DC control systems.
• Auxiliary Signaling: The integrated auxiliary contact (1 NO) can be used for feedback, interlocking, or triggering other control elements.

Technical Overview

Standards Compliance:

• IEC 60947-1: General Rules
• IEC 60947-4-1: Contactors and Motor-starters (Electromechanical Contactors)
• IEC 60947-5-1: Control Circuit Devices and Switching Elements (Auxiliary Switches)

Protection of Connections: All connections on the Siemens 3RT2316-1BW40 contactor, including main, auxiliary, and control supply voltage connections, must be adequately protected against short circuits, overload, and overvoltage using suitable external measures. Refer to the technical product data sheet and relevant configuration manuals for detailed guidance on protection devices such as circuit breakers and overload relays.

Electromagnetic Compatibility (EMC): The contactor fulfills the requirements for environment category A, ensuring reliable operation in typical industrial settings. For applications involving frequency converters, consult the Equipment Manual for specific configuration notes.

Contact Reliability of Auxiliary Contacts: The auxiliary contacts are designed for high contact reliability, particularly suitable for switching low voltages (≤ 110 V) and low currents (≤ 100 mA), making them ideal for solid-state circuits with currents ≥ 1 mA at voltages of 17 V and higher.

Motor Protection Compatibility: While primarily designed for AC-1 applications, the 3RT23 series contactors can be combined with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for protection against motor overload if adapted for specific motor-driven loads (AC-3).

Operating Mechanism: This version features a conventional DC operating mechanism, controlled via the A1-A2 control supply voltage connection.

Maintenance and Expandability: The solenoid coil of the 3RT2316-1BW40 is replaceable, extending the lifespan of the unit. The basic unit also allows for expansion with additional auxiliary switches, offering increased flexibility for complex control requirements.

Accessories and Spare Parts: A wide range of accessories and spare parts are available for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays, including surge suppressors, auxiliary switches, and other mounting components. Please refer to the Siemens accessories catalog for detailed ordering information.

Application

The Siemens 3RT2316-1BW40 contactor is an excellent choice for:

• Switching non-inductive or weakly inductive loads (AC-1)
• Controlling heating elements and lighting systems
• Isolating electrical loads or power generation plants from the grid
• Implementing transfer switching solutions
• Integration into industrial control panels and automation systems

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