Siemens 3RT2325-1AG20 SIRIUS 4-Pole Contactor, AC-1, 35A, 110V AC Coil, S0 Screw Terminal Original Brand New

Siemens 3RT2325-1AG20 SIRIUS 4-Pole Contactor for AC-1 Applications

The Siemens 3RT2325-1AG20 is a robust and reliable SIRIUS 3RT23 series contactor, engineered for efficient switching of weak or non-inductive loads (AC-1) in industrial and commercial applications. This 4-pole device is designed to handle currents up to 35 A at 400 V (at 40 °C) and features a versatile 110 V AC (50/60 Hz) operating coil. Equipped with integrated 1 NO (normally open) + 1 NC (normally closed) auxiliary contacts and convenient screw terminals, this Size S0 contactor ensures straightforward installation and integration into your control systems.

Overview

The Siemens 3RT2325-1AG20 contactor is a crucial component for various power switching scenarios, including disconnecting loads or power generation plants from the grid and transfer switching applications. Part of the trusted SIRIUS family, it upholds Siemens’ commitment to quality and performance, offering high contact reliability and comprehensive protection features.

Key Benefit

• Reliable Performance: Designed for AC-1 applications, ensuring stable and efficient switching of non-inductive loads.
• Integrated Auxiliary Contacts: Comes standard with 1 NO + 1 NC auxiliary contacts, providing immediate feedback and control possibilities for your system.
• Robust Construction: Built to withstand demanding industrial environments, ensuring long-term operational stability.
• Easy Installation: Features user-friendly screw terminals and a compact S0 size for quick and secure mounting.
• High Contact Reliability: Auxiliary contacts are optimized for low-voltage and low-current applications (≤ 110 V, ≤ 100 mA), ideal for solid-state circuits.
• Standards Compliant: Meets stringent international standards including IEC 60947‑1, IEC 60947‑4‑1, and IEC 60947‑5‑1 (for auxiliary switches), guaranteeing safety and performance.
• Versatile Application: Suitable for general-purpose switching of resistive loads, heating systems, lighting, and more.

Function

• Four-Pole Switching: Capable of switching four independent circuits, making it versatile for various load configurations.
• AC-1 Application: Specifically designed for switching non-inductive or slightly inductive loads, such as resistance furnaces, heaters, and distribution circuits.
• Coil Operation: Activated by a 110 V AC (50/60 Hz) control supply voltage applied to terminals A1 – A2.
• Auxiliary Contact Integration: The built-in 1 NO and 1 NC auxiliary contacts provide signaling and interlocking functions for control circuits.

Protection Features:

The Siemens 3RT2325-1AG20 requires appropriate protection measures for its connections:

• Main Circuit Protection: For standalone contactor protection, refer to the technical product data sheet. For combinations with overload relays (e.g., 3RU2 thermal or 3RB3 electronic) or circuit breakers as motor feeders, consult the Digital or Configuration Manual for load feeders.
• Auxiliary Connection Protection: Detailed information on auxiliary contact protection can be found in the technical product data sheet.
• Control Supply Voltage Protection: Adhere to relevant standards for control panel configuration. Consider power supplies with current-limiting functions and select suitable protection devices, accounting for inrush current peaks and holding power.
• Overvoltage Protection (Control Supply): Can be retrofitted with optional surge suppressors (RC elements, varistors, diodes) for damping opening surges, available as accessories. (Note: 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. When used with frequency converters, observe configuration notes in the Equipment Manual.

Motor Protection (for compatible 3RT23 series contactors):

• For overload protection, 3RU2 thermal overload relays or 3RB3 electronic overload relays can be directly mounted onto 3RT23 contactors (check compatibility for specific models).

Operating Mechanism:

• This 3RT23 series contactor is equipped with a conventional AC operating mechanism.

Maintenance and Expansion:

• Solenoid Coil Replacement: The solenoid coil for this 3RT23 series contactor is replaceable.
• Auxiliary Contact Expansion: While the basic unit includes 1 NO + 1 NC, further auxiliary switches can be added as accessories, adhering to permissible configurations. Refer to the Auxiliary switches, instantaneous → Overview for detailed information on fitting.

Accessories and Spare Parts:

A wide range of accessories and spare parts are available for the SIRIUS 3RT2 contactor series, including surge suppressors, additional auxiliary switches, and more. For detailed ordering data, please refer to the Accessories and spare parts for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays.

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