Overview
The Siemens SIRIUS 3RT2336-1AC20 is a robust and reliable 4-pole contactor designed for switching resistive (AC-1) loads up to 60 Amperes at 400 Volts (at 40 °C). As part of the highly regarded SIRIUS 3RT23 series, this compact Size S2 contactor offers superior performance and integration capabilities for industrial control applications. Featuring a 24V AC (50/60 Hz) coil and integrated 1 NO + 1 NC auxiliary contacts with secure screw terminals, it provides dependable control and signaling for a wide range of non-inductive switching tasks, including load isolation and power generation plant disconnection. Engineered to meet international standards such as IEC 60947, the 3RT2336-1AC20 ensures high contact reliability and robust protection for your electrical systems.
Features:
- 4-Pole Design: Ideal for switching multi-phase or multiple single-phase resistive loads (AC-1).
- High Current Rating: Handles up to 60A at 400V (40°C ambient temperature).
- Versatile Coil Voltage: Operates with a 24V AC, 50/60 Hz control supply voltage.
- Integrated Auxiliary Contacts: Includes 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact for feedback and control circuits.
- Secure Screw Terminals: Ensures reliable and straightforward wiring for both main and auxiliary circuits.
- Compact Size S2: Space-efficient design suitable for various panel configurations.
- Exceptional Durability: Boasts a mechanical service life of up to 10 million operating cycles.
- Climate Resistant: Approved for worldwide use and suitable for diverse environmental conditions.
- Standards Compliant: Meets rigorous international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1.
- Expandable: Compatible with additional auxiliary switches and surge suppressors for enhanced functionality (sold separately).
Function
The Siemens 3RT2336-1AC20 contactor primarily functions as an electrically operated switch for:
- Four-pole switching of weak or non-inductive loads (AC-1): This includes applications like heating elements, lighting, and general resistive circuits.
- Disconnecting loads or power generation plants from the grid: Provides reliable isolation for maintenance or emergency situations.
- Transfer switching: Facilitates switching between different power sources or loads.
- Integration into motor protection schemes: Can be combined with 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive load feeder solutions (for AC-1 applications, not motor starting).
Benefit
- Enhanced System Reliability: Built to Siemens’ high quality standards, ensuring long-term, stable operation in demanding industrial environments.
- Simplified Installation: Screw terminals and a compact S2 size streamline the wiring and mounting process.
- Flexible Control: 24V AC coil and integrated auxiliary contacts offer versatile control options.
- Optimized Protection: Designed for integration with protection devices, safeguarding connected equipment from short circuits, overload, and overvoltage.
- Global Applicability: Adherence to international standards allows for seamless deployment in diverse regions.
- Cost-Effective Operation: Durable construction and high contact reliability reduce maintenance requirements and downtime.
- Future-Proof: Part of the modular SIRIUS system, allowing for easy expansion and adaptation with a wide range of accessories.
Application
- Building Management Systems
- Industrial HVAC
- Lighting Control Panels
- Heating Systems
- Power Distribution Boards
- Renewable Energy Systems (e.g., isolating solar panels)
- General Resistive Load Switching
Explore the full range of Siemens SIRIUS products at Turll for all your industrial control needs.












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