Siemens SIRIUS 3RT2326-1AP00 Contactor 4-Pole AC-1, 40A, 230V AC, S0 Size with 1 NO + 1 NC Auxiliary Contact Original Brand New

Siemens SIRIUS 3RT2326-1AP00 Contactor – Robust 4-Pole Switching for Industrial Application

The Siemens SIRIUS 3RT2326-1AP00 is a high-performance 4-pole contactor engineered for reliable switching of non-inductive or weakly inductive loads (AC-1 category) in diverse industrial environments. With a rated current of 40A at 400V / 40°C and a 230V AC, 50 Hz control voltage, this compact S0 size contactor is an essential component for power distribution, load disconnection, and transfer switching applications. Its integrated 1 normally open (NO) and 1 normally closed (NC) auxiliary contacts, combined with secure screw terminals, offer versatile control and monitoring capabilities.

Overview

The Siemens 3RT2326-1AP00 belongs to the renowned SIRIUS 3RT23 series, known for its robust design, compact footprint, and exceptional reliability. This contactor is built to meet stringent international standards, ensuring safe and efficient operation in critical industrial processes. It offers straightforward integration into control panels and systems, providing a dependable solution for various switching tasks.

Key Features & Benefit

• High Performance AC-1 Switching: Rated for 40A at 400V / 40°C, ideal for 4-pole switching of non-inductive loads such as heating elements, lighting systems, or resistive loads.
• Integrated Auxiliary Contacts: Features 1 NO (Normally Open) and 1 NC (Normally Closed) auxiliary contacts, providing immediate feedback on contactor status for interlocking, signaling, and control circuits.
• Reliable 230V AC Coil: Operates on a standard 230V AC, 50 Hz control supply voltage, ensuring compatibility with common industrial power systems.
• Compact S0 Size: Optimized for space-saving installation within control cabinets and electrical enclosures.
• Secure Screw Terminals: Guarantees robust and reliable electrical connections for both main and auxiliary circuits.
• Modular Design: Part of the Siemens SIRIUS family, allowing for easy integration with other SIRIUS components like overload relays and auxiliary switches for enhanced functionality.
• Long Service Life: Designed for high endurance and reliability in demanding industrial conditions, minimizing downtime and maintenance.
• Standards Compliant: Adheres to essential international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, ensuring safety and performance.

Function

• Four-Pole Switching of AC-1 Loads: Efficiently controls the flow of current to resistive or mildly inductive loads.
• Load Disconnection: Provides a reliable means to disconnect loads or power generation plants from the electrical grid.
• Transfer Switching: Can be utilized in applications requiring the switching between different power sources or loads.
• Control Circuit Integration: The integrated auxiliary contacts allow for seamless integration into complex control and interlocking circuits.

Standards Compliance:

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

Protection Measures:

• Main Connections: Requires external short-circuit and overload protection. Refer to the technical product data sheet and configuration manuals for detailed guidance on device combinations (e.g., with overload relays or circuit breakers).
• Auxiliary Connections: Short-circuit and overload protection of auxiliary contacts should be implemented as per technical product data sheet recommendations.
• Control Supply Voltage: Protection requires careful consideration of relevant standards, cable dimensioning, load characteristics (inrush current, holding power), and suitable power supplies (e.g., with current-limiting function) or protection devices (e.g., miniature circuit breakers).
• Overvoltage Protection: 3RT23 contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes) to dampen opening surges in the coil (ordered separately). Note that damping may increase break and delay times.

Connection Methods:

• Main Circuit: Screw terminals.
• Auxiliary and Control Circuit: Screw terminals.

Electromagnetic Compatibility (EMC):

• Fulfills requirements for environment category A.
• Note: When used with frequency converters, specific configuration notes from the Equipment Manual must be observed.

Contact Reliability of Auxiliary Contacts:

• Designed for high contact reliability, especially suitable for switching low voltages ($\le$ 110 V) and currents ($\le$ 100 mA), as well as solid-state circuits with currents $\ge$ 1 mA at voltages of 17 V and higher.

Motor Protection (Applicable to 3RT23 Series):

• For overload protection of motors, this contactor can be combined with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays (mounted directly).

Operating Mechanism:

• Conventional AC operating mechanism.
• Control via control supply voltage connection A1 – A2.

Maintenance & Expandability:

• Solenoid Coil Replacement: Possible for this 3RT2326-1AP00 model.
• Auxiliary Contact Expansion: The basic unit can be expanded with additional auxiliary switches (ensure permissible configuration is observed).

Accessories & Spare Parts:

A wide range of accessories and spare parts are available for the SIRIUS 3RT2 contactors, including surge suppressors, additional auxiliary switches, and more. Refer to the “Accessories and spare parts for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays” documentation for detailed ordering information.

Application

• Switching resistive heating loads
• Controlling lighting circuits
• Disconnecting power to non-motor loads
• Implementing transfer switching in power systems
• Integration into control panels for industrial machinery

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