Siemens 3VA1140-5EE32-0AA0 High Breaking Capacity 3VA11 Series MCCB 40A 3P 55kA

The Siemens 3VA1140-5EE32-0AA0 is a robust 3-pole Miniature Circuit Breaker (MCCB) from the 3VA11 series, engineered for superior protection in demanding industrial environments. This 40A MCCB boasts an impressive breaking capacity of 55kA, ensuring reliable circuit interruption even under significant fault conditions. Its advanced thermal-magnetic trip unit offers precise overcurrent and short-circuit protection, safeguarding equipment and personnel. Designed for ease of integration and operation, the 3VA11 series exemplifies Siemens' commitment to safety, reliability, and efficiency in power distribution.

Product Specifications

| Parameter                 | Value                       |

| :------------------------ | :-------------------------- |

| Product Type              | MCCB                        |

| Series                    | 3VA11                       |

| Model Number              | 3VA1140-5EE32-0AA0          |

| Rated Current             | 40A                         |

| Number of Poles           | 3P                          |

| Breaking Capacity (Icu)   | 55kA                        |

| Trip Unit Type            | Thermal-Magnetic            |

| Voltage Rating            | 400/415V AC                 |

| Mounting Type             | DIN Rail, Panel Mount       |

| Terminal Type             | Screw Terminals             |

| Standards Compliance      | IEC 60947-2                 |

| Protection Class          | IP20 (enclosure dependent)  |

| Ambient Temperature Range | -25 to +55 °C               |

Core Features & Market Positioning

The Siemens 3VA1140-5EE32-0AA0 distinguishes itself through its high breaking capacity of 55kA, positioning it as a premium choice for applications where fault currents are a significant concern. This capability, combined with a reliable thermal-magnetic tripping mechanism, offers robust protection against both persistent overloads and sudden short circuits. The 3VA11 series is engineered for straightforward installation and maintenance, reducing downtime and operational costs, a key differentiator in the competitive MCCB market. Its adherence to IEC 60947-2 standards underscores its global applicability and high quality.

Key Application Scenarios

This 40A, 3-pole MCCB is ideally suited for a wide array of industrial power distribution systems, including control panels, machine tools, and motor protection circuits. Its 55kA breaking capacity makes it an excellent choice for main incoming feeders and distribution boards in facilities with higher fault current potential, such as manufacturing plants and commercial buildings. The thermal-magnetic protection is particularly effective for safeguarding motors, transformers, and other inductive loads that can experience transient inrush currents. Its suitability for DIN rail or panel mounting offers flexibility in diverse electrical enclosure designs.

Practical System Integration Guidance

Integrating the Siemens 3VA1140-5EE32-0AA0 into existing or new electrical systems is a streamlined process. Ensure that the power source and downstream load are within the MCCB's rated current (40A) and voltage (400/415V AC) limits. For installation, secure mounting on a DIN rail or panel is critical for mechanical stability and proper operation. Connect the incoming power conductors to the line-side terminals and the outgoing circuit conductors to the load-side terminals, ensuring correct phase sequencing for 3-pole applications. Torque all screw terminals to the manufacturer's specified values to prevent loose connections, which can lead to overheating and operational failures. The MCCB is designed for direct wiring, typically utilizing screw terminals for secure connections.

Operation and Risk Mitigation

Operating the Siemens 3VA1140-5EE32-0AA0 involves the simple actuation of the toggle lever to the "ON" or "OFF" position. Tripping, indicated by the lever moving to the tripped position (often with a visual indication), signifies an overcurrent or short-circuit event. To reset, first identify and rectify the cause of the trip. Then, push the lever fully to the "OFF" position before switching it back "ON". Common troubleshooting involves checking for overloaded circuits, short circuits in downstream wiring or connected equipment, or a faulty MCCB itself. Avoid resetting the breaker repeatedly without addressing the underlying issue, as this can damage the internal tripping mechanism or connected equipment. Regular visual inspection for signs of damage or overheating is recommended.

Scalability & Long-Term Value

The Siemens 3VA1140-5EE32-0AA0, as part of the broader 3VA series, offers inherent value through its compatibility with a range of accessories and potential for system expansion. While this specific model is a fixed-configuration MCCB, the 3VA platform supports various auxiliary contacts, alarm contacts, and communication modules (depending on the specific variant and series extension) that can be retrofitted. This allows for enhanced monitoring, remote signaling, and integration into modern industrial control and IIoT systems, providing a scalable solution that grows with evolving industrial automation needs and digital transformation initiatives. Its robust construction ensures a long operational lifespan, minimizing the need for premature replacements.

FAQs

1. What is the breaking capacity of the Siemens 3VA1140-5EE32-0AA0 MCCB?

The Siemens 3VA1140-5EE32-0AA0 features a substantial breaking capacity of 55kA. This high rating ensures it can safely interrupt severe short-circuit currents. It is designed to protect electrical systems in environments with higher fault current levels.

This robust capability makes the MCCB suitable for main incoming lines and critical distribution points. It provides a high level of safety against catastrophic electrical failures.

The 55kA rating exceeds that of many standard MCCBs, offering enhanced protection for sensitive equipment and personnel. It aligns with demanding industrial safety standards.

2. What type of protection does the Siemens 3VA1140-5EE32-0AA0 offer?

This MCCB provides comprehensive thermal-magnetic protection. The thermal element protects against sustained overloads. The magnetic element provides rapid response to high short-circuit currents.

It effectively guards electrical circuits against both gradual overheating and sudden, dangerous fault conditions. This dual protection is crucial for motor and equipment longevity.

The thermal-magnetic trip unit is a reliable and time-tested technology for general-purpose circuit protection. It offers dependable performance across a wide temperature range.

3. Can the Siemens 3VA1140-5EE32-0AA0 be used for motor protection?

Yes, the 3VA1140-5EE32-0AA0 is well-suited for motor protection applications. Its thermal overload protection can be set to match motor full-load current. The magnetic trip setting provides essential short-circuit backup.

The 40A rating and 55kA breaking capacity provide adequate protection for many industrial motors. Ensure precise setting of the thermal element to avoid nuisance tripping during startup.

Always consult the motor's nameplate data and local electrical codes to confirm suitability and proper settings for specific motor protection needs. This ensures optimal safety and operational reliability.

4. What are the main applications for the Siemens 3VA1140-5EE32-0AA0?

This MCCB is widely used in industrial power distribution systems. It serves as a main breaker in control panels and switchboards. It is also ideal for protecting individual circuits and equipment.

Key application areas include manufacturing plants, machine tools, and pump controls. Its high breaking capacity is beneficial in areas with higher potential fault currents.

The 3-pole configuration makes it suitable for protecting three-phase loads and ensuring complete isolation. Its robust design ensures reliable operation in harsh environments.

5. How is the Siemens 3VA1140-5EE32-0AA0 installed?

Installation typically involves mounting the MCCB onto a standard 35mm DIN rail or a panel mount. Connect the incoming power conductors to the line-side terminals. Connect the outgoing conductors to the load-side terminals.

Ensure proper torque is applied to all screw terminals to guarantee secure electrical connections and prevent overheating. Follow the wiring diagrams provided by Siemens for correct phase connections.

The device is designed for front wiring, facilitating easier access and connection within electrical enclosures. Always ensure the power supply is de-energized before commencing installation.

6. What is the voltage rating of this MCCB?

The Siemens 3VA1140-5EE32-0AA0 has a voltage rating of 400/415V AC. This is a standard voltage for industrial power systems in many regions. It is crucial to ensure this rating matches the system voltage.

Operating the MCCB outside its specified voltage range can lead to malfunction or failure. Always verify system voltage compatibility before installation.

This rating is suitable for typical three-phase industrial power supplies, providing reliable protection within these parameters. It adheres to international electrical standards for this voltage class.

7. What does "3P" signify in the product name?

"3P" indicates that the circuit breaker is a 3-pole device. This means it is designed to interrupt all three phases of a three-phase power supply simultaneously. It provides complete isolation for three-phase loads.

Using a 3-pole breaker is essential for protecting three-phase motors and equipment. It ensures safety and prevents unbalanced phase conditions during faults.

This design is standard for industrial applications involving three-phase power distribution, offering unified protection and control. It is vital for maintaining system integrity.

8. What standards does the Siemens 3VA1140-5EE32-0AA0 comply with?

This MCCB complies with the international standard IEC 60947-2. This standard specifies the requirements for low-voltage switchgear and controlgear, including circuit-breakers. Compliance ensures a high level of safety and performance.

Adherence to IEC 60947-2 means the product has undergone rigorous testing for electrical and mechanical properties. It guarantees reliable operation and protection capabilities.

This compliance makes the Siemens 3VA1140-5EE32-0AA0 suitable for use in a wide range of global markets and industrial installations. It signifies a trusted and verified product.

9. Can this MCCB be used in harsh environmental conditions?

The standard operating temperature range is -25 to +55 °C. While robust, its IP20 protection class (depending on enclosure) means it is protected against solid objects larger than 12.5mm but not against water. For very harsh conditions, an appropriate enclosure is necessary.

Siemens offers various accessories and enclosure solutions that can enhance protection against dust, moisture, or corrosive elements. Consult Siemens documentation for specific environmental considerations.

With proper enclosure and installation, this MCCB can reliably operate in many demanding industrial settings. Its durable construction supports long-term performance.

10. What are the benefits of using a Siemens 3VA1140-5EE32-0AA0?

Key benefits include high breaking capacity (55kA) for superior fault protection. It offers reliable thermal-magnetic tripping for overload and short-circuit defense. Its 3-pole design ensures complete isolation for three-phase systems.

The MCCB is designed for ease of installation and integration into various electrical systems. It adheres to international standards (IEC 60947-2), ensuring quality and safety.

Its robust construction from a reputable manufacturer like Siemens signifies long-term reliability and reduced maintenance needs, providing excellent value over its lifespan.