Siemens SIRIUS 3RT2336-1AN20 Contactor 4-Pole, AC-1, 60A, 220V AC Coil, S2 Size Original Brand New

Siemens SIRIUS 3RT2336-1AN20 Contactor: Robust 4-Pole AC-1 Switching for Industrial Application

The Siemens SIRIUS 3RT2336-1AN20 is a high-performance 4-pole AC-1 contactor, expertly engineered for switching weak or non-inductive loads in industrial and commercial settings. Designed to meet the stringent demands of modern electrical systems, this Size S2 contactor boasts a robust 60 A current rating (at 400 V / 40 °C) and is controlled by a reliable 220 V AC 50/60 Hz coil.

Key Features and Benefit

• High Current Capacity: Rated for 60 A (AC-1 at 400 V / 40 °C), making it suitable for a wide range of resistive and mildly inductive loads.
• 4-Pole Configuration: Provides versatile switching capabilities for multi-phase systems or complex load management.
• Efficient Control: Features a 220 V AC, 50/60 Hz operating mechanism for precise and dependable control.
• Integrated Auxiliary Contacts: Equipped with 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, offering additional signaling and interlocking options.
• Secure Screw Terminals: Ensures reliable and straightforward wiring for the main, auxiliary, and control circuits.
• Compact Size S2: Optimized for space-saving integration within control panels and electrical enclosures.
• Standards Compliance: Adheres to international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), ensuring safety and performance.
• Enhanced Protection: Designed with considerations for short-circuit, overload, and overvoltage protection, contributing to system longevity and safety (refer to technical data for specific recommendations).
• High Contact Reliability: Auxiliary contacts are ideal for low-voltage/low-current applications (≤ 110 V, ≤ 100 mA), ensuring dependable switching in solid-state circuits.
• Versatile Application: Perfect for four-pole switching of weak or non-inductive loads, disconnecting loads or power generation plants from the grid, and transfer switching.

Overview

The Siemens 3RT2336-1AN20 contactor is part of the SIRIUS 3RT23 series, renowned for its reliability and versatility in industrial automation. This model is specifically designed for AC-1 applications, which involve switching purely resistive or slightly inductive loads where the current drawn is largely in phase with the voltage.

Standard

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

Protection of Device Connections:

Proper protection against short circuits, overloads, and overvoltage is crucial for optimal device performance and safety.

• Main Connections: For standalone contactor protection, consult the technical product data sheet. For combinations with overload relays or circuit breakers (motor feeders), refer to the Digital and Configuration Manuals for load feeders.
• Auxiliary Connections: Specific protection details for auxiliary contacts are available in the technical product data sheet.
• Control Supply Voltage: Adherence to relevant standards for control panel configuration and cable dimensioning is essential. Consider power supplies with current-limiting functions and appropriate protection devices. Recommendations for miniature or circuit breakers in control circuits can be found in the “Control panel tip – Selecting and dimensioning suitable power supplies quickly and reliably” guide.
• Overvoltage Protection: 3RT23 contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes, or diode assemblies) to damp opening surges in the coil. Note that damping may increase break and delay times; refer to the Equipment Manual for detailed influence.

Connection Methods:

• Main Circuit: This 3RT233 contactor features screw terminals with a box terminal for robust connections. Direct connection to connecting bars is possible with cable lugs when the box terminal is removed.
• Auxiliary and Control Circuit: Utilizes reliable screw terminals for all auxiliary and control connections.

Electromagnetic Compatibility (EMC):

These contactors meet the requirements for environment category A, ensuring reliable operation in typical industrial environments. For applications involving frequency converters, consult the configuration notes in the Equipment Manual.

Contact Reliability of Auxiliary Contacts:

The auxiliary contacts of 3RT contactors and 3RH contactor relays offer high contact reliability, particularly suitable for switching voltages ≤ 110 V and currents ≤ 100 mA. They are also ideal for solid-state circuits with currents ≥ 1 mA at voltages of 17 V and higher.

Motor Protection:

For overload protection, Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays can be directly mounted on 3RT23 contactors like this one, providing a complete and integrated motor feeder solution.

Operating Mechanism Types:

The 3RT23 contactors are available with conventional AC or DC operating mechanisms. This specific model features a 220 V AC 50/60 Hz coil.

Replacing Solenoid Coils & Contacts:

Solenoid coil replacement is possible for the 3RT2336-1AN20. For 3RT233 contactors, only the contacts can be replaced.

Application

The Siemens 3RT2336-1AN20 contactor is ideal for:

• Four-pole switching of weak or non-inductive loads (AC-1)
• Disconnecting loads or power generation plants from the grid
• Transfer switching application

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