Siemens 3RT2325-1AN20 SIRIUS Contactor 35A, 4-Pole, AC-1, 220V AC Coil, S0 Size Original Brand New

Overview

The Siemens 3RT2325-1AN20 is a robust and reliable SIRIUS 3RT2 series power contactor, specifically designed for switching AC-1 category loads. This 4-pole contactor is rated for 35 A at 400 V / 40 °C, making it ideal for controlling non-inductive or weakly inductive loads in industrial and commercial applications. Equipped with a 220 V AC, 50/60 Hz coil and featuring 1 normally open (NO) and 1 normally closed (NC) auxiliary contacts, it offers versatile control capabilities. Its compact S0 size and convenient screw terminals simplify installation and wiring in control panels. As part of the SIRIUS modular system, it integrates seamlessly with other Siemens control gear for comprehensive load feeder solutions.

Benefit

• Reliable AC-1 Switching: Optimized for switching resistive and low-inductive loads, ensuring stable and efficient operation.
• Integrated Auxiliary Contacts: Comes with 1 NO + 1 NC auxiliary contacts, providing essential feedback and control options without needing additional modules.
• Robust & Durable: Built to Siemens’ high-quality standards, ensuring a long service life and dependable performance in demanding environments.
• Easy Installation: Features user-friendly screw terminals for straightforward and secure wiring.
• Compact Design: Size S0 form factor saves valuable space in control cabinets.
• System Integration: Part of the Siemens SIRIUS modular system, allowing for easy combination with overload relays, circuit breakers, and other accessories for complete motor starters or load feeders.
• Enhanced Safety: Adheres to international standards like IEC 60947, ensuring safe and compliant operation.

Function

• Switching Non-Inductive/Weakly Inductive Loads (AC-1): Effectively controls heating elements, lighting circuits, distribution boards, and similar loads.
• Disconnection: Used for safely disconnecting loads or power generation plants from the grid.
• Transfer Switching: Can be configured for transfer applications in power distribution systems.
• Control Circuit Integration: Auxiliary contacts enable signaling, interlocking, and cascading operations within control circuits.
• Short-Circuit & Overload Protection Integration: Designed to be easily combined with external short-circuit and overload protection devices (e.g., 3RU2 thermal overload relays, 3RB3/3RB2 electronic overload relays) for comprehensive load protection.

Standards:

• IEC 60947‑1
• IEC 60947‑4‑1
• IEC 60947‑5‑1 (auxiliary switches)

Protection of Device Connections: All connections should be protected against overload and short circuits. Refer to the technical product data sheet for specific protection details for free-standing contactors and device combinations (contactor with overload relay or circuit breaker). For auxiliary and control supply voltage connections, relevant standards for control panel configuration, cable dimensioning, and suitable power supply selection with current-limiting functions should be considered. Overvoltage protection for the control supply voltage connection can be achieved by retrofitting RC elements, varistors, diodes, or diode assemblies (ordered separately as accessories).

Connection Methods:

• Main Circuit (3RT231/3RT232): Screw or spring-loaded terminals.
• Auxiliary and Control Circuit: Screw terminals.

Electromagnetic Compatibility (EMC): Fulfills the requirements for environment category A. When used with frequency converters, specific configuration notes from the Equipment Manual must be observed.

Contact Reliability of Auxiliary Contacts: For switching voltages $\le$ 110 V and currents $\le$ 100 mA, the auxiliary contacts of 3RT contactors (such as this 3RT2325-1AN20) or 3RH contactor relays are recommended for their high contact reliability, especially suitable for solid-state circuits with currents $\ge$ 1 mA at 17 V and higher.

Motor Protection (Relevant for AC-3 versions, but noted for 3RT23 series compatibility): While this specific model is AC-1, the 3RT23 contactors are compatible with 3RU2 thermal overload relays or 3RB3 electronic overload relays for overload protection when used in motor starter applications.

Operating Mechanism Types (General 3RT23 Series): 3RT23 contactors are available with conventional AC or DC operating mechanisms, or wide-range solid-state operating mechanisms. This model features a 220 V AC 50/60 Hz coil.

Replacing Solenoid Coils, Operating Mechanisms, or Spare Contacts: Solenoid coil replacement is possible for 3RT23 contactors. Contacts for 3RT233 contactors can be replaced.

Fitting Auxiliary Contacts and Mounting Additional Auxiliary Switches: The 3RT2325-1AN20 basic unit comes with two integrated auxiliary contacts (1 NO + 1 NC). All basic units can be expanded with additional auxiliary switches, adhering to permissible configurations.

Accessories and Spare Parts: A wide range of accessories and spare parts are available for SIRIUS 3RT2 contactors, including surge suppressors, auxiliary switches, and connecting components.

Application

• Switching heating, lighting, and ventilation systems.
• Controlling non-motorized resistive or slightly inductive loads in industrial automation.
• Disconnecting power generation plants or specific sections of a grid.
• Integration into complex control circuits requiring reliable signaling and interlocking.

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