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SIEMENS 3RT2327-1BG40 Contactor

Mar. 16 , 2026

1. Product Name
SIEMENS 3RT2327-1BG40 Contactor

2. Product Brief Introduction
The SIEMENS 3RT2327-1BG40 is a compact magnetic contactor from the Siemens SIRIUS 3RT series. It is a reliable electromechanical switching device designed for controlling three-phase electrical loads, particularly used for starting and stopping electric motors in a wide range of industrial and commercial applications.

3. Product Description
The SIEMENS 3RT2327-1BG40 is a versatile, three-pole magnetic contactor belonging to the highly regarded Siemens SIRIUS 3RT modular system. Engineered for performance and reliability, its core function is to serve as a remotely operated power switch capable of making and breaking electrical circuits that carry significant current. Its primary application is the safe and efficient control of three-phase electric motors. When its electromagnetic coil (rated per the '-1BG40' suffix) is energized by a low-voltage control signal from a push-button, relay, or Programmable Logic Controller (PLC), it actuates and closes its main power contacts, thereby supplying power to the load such as a ‌SIEMENS MOTOR‌. De-energizing the coil opens the contacts and stops the motor. Designed to withstand frequent switching and the high inrush currents associated with motor starts, it features durable construction with silver-based contact materials for excellent arc quenching and a long electrical lifespan. The SIRIUS modular system's key benefit is its expandability. The 3RT2327-1BG40 can be easily equipped with clip-on accessories like auxiliary contact blocks (for control and status signaling), mechanical interlocks (for safety in reversing starters), and surge suppressors. This flexibility makes it a fundamental, cost-effective, and space-saving component within motor control centers (MCCs), machinery panels, and automation systems, providing dependable control for ‌SIEMENS MOTORs‌ in applications like pumps, fans, conveyors, compressors, and various other industrial loads.

4. Product Model Number

3RT2327-1BG403VA6780-7HM31-0AA06SL3520-3XM00-5AF0
3RT2327-1BM403VA6780-7HM31-2AA06SL3520-3XM00-7AA0
3RT2327-2AB003VA6780-7HN31-0AA06SL3520-3XM00-7AB0
3RT2327-2AC203VA6780-7HN31-2AA06SL3520-3XM00-7AF0
3RT2327-2AF003VA6780-7HQ31-0AA06SL3520-3XM01-1AA0
3RT2327-2AK603VA6780-7HQ31-2AA06SL3520-3XM01-1AB0
3RT2327-2AL203VA6780-7KP31-0AA06SL3520-3XM01-1AF0
3RT2327-2AP003VA6780-7KP31-2AA06SL3520-3XM01-5AA0
3RT2327-2AP603VA6780-7KQ31-0AA06SL3520-3XM01-5AB0
3RT2327-2BB403VA6780-7KQ31-2AA06SL3520-3XM01-5AF0
3RT2327-2BF403VA6780-7KT31-0AA06SL3520-3XM02-2AA0
3RT2327-2BG403VA6780-7KT31-2AA06SL3520-3XM02-2AB0
3RT2327-2BM403VA6816-5HL31-0AA06SL3520-3XM02-2AF0
3RT2336-1AB003VA6816-5HL31-2AA06SL3520-3XM03-0AA0
3RT2336-1AC203VA6816-5HM31-0AA06SL3520-3XM03-0AB0
3RT2336-1AF003VA6816-5HM31-2AA06SL3520-3XM03-0AF0
3RT2336-1AH203VA6816-5HN31-0AA06SL3520-3XM04-0AA0
3RT2336-1AK603VA6816-5HN31-2AA06SL3520-3XM04-0AB0
3RT2336-1AL203VA6816-5HQ31-0AA06SL3520-3XM04-0AF0
3RT2336-1AL20-Z X953VA6816-5HQ31-2AA06SL3520-3XM05-5AA0
3RT2336-1AM203VA6816-5KP31-0AA06SL3520-3XM05-5AF0
3RT2336-1AN203VA6816-5KP31-2AA06SL3520-3XM07-5AA0
3RT2336-1AP003VA6816-5KQ31-0AA06SL3520-3XM07-5AF0
3RT2336-1AP00-1AA03VA6816-5KQ31-2AA06SL3520-3XN00-3AA0
3RT2336-1AP00-4AA03VA6816-5KT31-0AA06SL3520-3XN00-3AB0
3RT2336-1AP603VA6816-5KT31-2AA06SL3520-3XN00-3AF0
3RT2336-1AU003VA6816-6HL31-0AA06SL3520-3XN00-5AA0
3RT2336-1AV003VA6816-6HL31-2AA06SL3520-3XN00-5AB0
3RT2336-1AV00-4AA03VA6816-6HM31-0AA06SL3520-3XN00-5AF0
3RT2336-1NB303VA6816-6HM31-2AA06SL3520-3XN00-7AA0
3RT2336-1NB30-4AA03VA6816-6HN31-0AA06SL3520-3XN00-7AB0
3RT2336-1NB30-Z X953VA6816-6HN31-2AA06SL3520-3XN00-7AF0
3RT2336-1NE303VA6816-6HQ31-0AA06SL3520-3XN01-1AA0
3RT2336-1NE30-0JB03VA6816-6HQ31-2AA06SL3520-3XN01-1AB0
3RT2336-1NF303VA6816-6KP31-0AA06SL3520-3XN01-1AF0
3RT2336-1NP303VA6816-6KP31-2AA06SL3520-3XN01-5AA0
3RT2336-1NP30-0JB03VA6816-6KQ31-0AA06SL3520-3XN01-5AB0
3RT2336-3XB40-0LA23VA6816-6KQ31-2AA06SL3520-3XN01-5AF0
3RT2336-3XB40-4LA23VA6816-6KT31-0AA06SL3520-3XN02-2AA0
3RT2336-3XF40-0LA23VA6816-6KT31-2AA06SL3520-3XN02-2AB0
3RT2337-1AB003VA6816-7HL31-0AA06SL3520-3XN02-2AF0
3RT2337-1AC203VA6816-7HL31-2AA06SL3520-3XN03-0AA0
3RT2337-1AF003VA6816-7HM31-0AA06SL3520-3XN03-0AB0
3RT2337-1AK603VA6816-7HM31-2AA06SL3520-3XN03-0AF0
3RT2337-1AL203VA6816-7HN31-0AA06SL3520-3XN04-0AA0
3RT2337-1AL20-Z X953VA6816-7HN31-2AA06SL3520-3XN04-0AB0
3RT2337-1AN203VA6816-7HQ31-0AA06SL3520-3XN04-0AF0
3RT2337-1AP003VA6816-7HQ31-2AA06SL3520-3XN05-5AA0
3RT2337-1AP603VA6816-7KP31-0AA06SL3520-3XN05-5AB0
3RT2337-1NB303VA6816-7KP31-2AA06SL3520-3XN05-5AF0
3RT2337-1NB30-Z X953VA6816-7KQ31-0AA06SL3520-3XN07-5AA0
3RT2337-1NE303VA6816-7KQ31-2AA06SL3520-3XN07-5AB0
3RT2337-1NF303VA6816-7KT31-0AA06SL3520-3XN07-5AF0
3RT2337-1NP303VA6816-7KT31-2AA06SL3521-0XA00-3AB0
3RT2337-3NB303VA6920-5KP31-0AA06SL3521-0XA00-5AB0
3RT2337-3XB40-0LA23VA6920-5KQ31-0AA06SL3521-0XA00-7AB0
3RT2337-3XF40-0LA23VA6920-5KT31-0AA06SL3521-0XA01-1AB0
3RT2344-1AB003VA6920-6KP31-0AA06SL3521-0XA01-5AB0
3RT2344-1AC203VA6920-6KQ31-0AA06SL3521-0XA02-2AB0
3RT2344-1AF003VA6920-6KT31-0AA06SL3521-0XA03-0AB0
3RT2344-1AG203VA6920-7KP31-0AA06SL3521-0XA04-0AB0
3RT2344-1AK603VA6920-7KQ31-0AA06SL3521-0XA05-5AB0
3RT2344-1AL203VA6920-7KT31-0AA06SL3521-0XA07-5AB0
3RT2344-1AN203VA9007-0NA106SL3521-0XA20-3AA0
3RT2344-1AP003VA9032-0LB206SL3521-0XA20-3AF0
3RT2344-1AP603VA9033-0LB206SL3521-0XA20-5AA0
3RT2344-1AV003VA9033-0SB106SL3521-0XA20-5AF0
3RT2344-1NB303VA9033-0SB206SL3521-0XA20-7AA0
3RT2344-1NF303VA9034-0SB106SL3521-0XA20-7AF0
3RT2344-1NP303VA9034-0SB206SL3521-0XA21-1AA0
3RT2346-1AB003VA9037-0LB116SL3521-0XA21-1AF0

5. Product Advantages

  • Compact and Cost-Effective Design:‌ Offers a space-saving footprint and provides reliable performance at a competitive price point, ideal for applications with space and budget constraints.

  • High Reliability and Long Service Life:‌ Built with robust materials and reliable contact technology to ensure a long mechanical and electrical life, capable of handling millions of switching operations in demanding conditions.

  • Modular Flexibility:‌ As part of the SIRIUS modular system, it allows for simple, tool-free addition of auxiliary contacts and other functional accessories, enabling customization to meet specific application needs without replacing the main unit.

  • Easy Installation and Wiring:‌ Designed with user-friendly features such as clear terminal markings and a straightforward mounting system, significantly reducing assembly time and simplifying panel layout and maintenance.

  • Wide Application Suitability:‌ Well-suited for a broad range of control tasks, from switching auxiliary loads and heaters to the reliable starting and stopping of small to medium-sized ‌SIEMENS MOTORs‌ and other inductive loads.

6. Website Analysis & Insights
Based on the attached ‌‌ for the website ‌www.wheat-auto.com‌, which belongs to Changzhou Wheat Automation Technology Co., Ltd., the company operates as a supplier, distributor, and international trader of industrial automation components and electronic products.

  • Core Business Model:‌ The company is a ‌trading and sourcing intermediary‌, not a manufacturer. It serves as a ‌one-stop sourcing channel‌ for a vast array of branded industrial components from numerous global manufacturers.

  • Product Portfolio:‌ The website prominently lists a wide range of international brands, including ‌SIEMENS MOTOR‌, ‌ABB MOTORS‌, DeWalt, Endress&Hauser, Krohne, Honeywell, METTLER TOLEDO, Yokogawa, and many others across categories like sensors, instruments, switches, PLCs, and pneumatic products.

  • Target Market:‌ The availability of the website in English, Chinese, and Russian indicates a clear strategic focus on the ‌global B2B market‌, targeting international clients in industrial automation, manufacturing, and process control sectors.

  • Value Proposition & Operations:‌ Their stated principle is "quality first, reputation first." Their primary value lies in ‌global supply chain management and logistics‌, providing customers worldwide with access to specific branded components. The "News" section functions as a direct product promotion feed, listing specific Siemens models and providing direct contact methods like WhatsApp (+86 15951219765), suggesting a strong ‌inquiry-based, direct sales model‌ aimed at buyers searching for exact part numbers.

Interpretation:‌ Changzhou Wheat Automation Technology Co., Ltd. positions itself as a commercial bridge, connecting global industrial manufacturers (like Siemens) with end-users and system integrators worldwide. Its expertise is in international trade, sourcing, and distribution of specialized industrial parts, leveraging its supply chain network rather than in-house manufacturing capabilities.

7. Use Scenarios

  • Motor Starter Assemblies:‌ Used as the main switching component in compact Direct-On-Line (DOL) or reversing motor starters to control small to medium-sized ‌SIEMENS MOTORs‌ in applications such as pumps, fans, blowers, and light-duty machinery.

  • Industrial Machine Control:‌ Integrated into control panels for machine tools, packaging equipment, assembly lines, and conveyor systems to reliably start and stop auxiliary motors, control solenoids, or manage other inductive loads based on commands from PLCs.

  • HVAC and Building Automation:‌ Employed in control circuits for commercial HVAC systems, building management systems (BMS), or lighting control panels to switch loads such as smaller fan motors, damper actuators, or heating elements.

  • Material Handling and Process Control:‌ Utilized in the control systems of smaller conveyor belts, sorting machines, or automated material handling and process equipment to control drive motors, agitators, or other actuators reliably.



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