Siemens 3VA1112-6ED42-0AA0 3VA11 Series Molded Case Circuit Breaker 125A 4P 70kA

The Siemens 3VA1112-6ED42-0AA0 3VA11 Series Molded Case Circuit Breaker offers robust protection and reliable performance for industrial electrical systems. This 125A, 4-pole, 70kA breaker is engineered with advanced thermal-magnetic tripping technology for precise overcurrent detection, ensuring the safety of personnel and equipment. Its compact design and high breaking capacity make it an ideal choice for demanding applications where space and performance are critical.

Product Specifications

| Feature                 | Specification                                  |

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

| Product Type            | Molded Case Circuit Breaker (MCCB)             |

| Series                  | 3VA11                                          |

| Model Number            | 3VA1112-6ED42-0AA0                             |

| Rated Current (In)      | 125 A                                          |

| Number of Poles         | 4                                              |

| Breaking Capacity (Icu) | 70 kA at 400/415V AC                           |

| Trip Unit Type          | Thermal-Magnetic (TMD)                         |

| Undervoltage Release    | No integral release (requires accessory)       |

| Auxiliary Switch        | No integral auxiliary switch (requires accessory) |

| Mounting Type           | DIN rail or panel mount                        |

| Protection Class        | IP20 (enclosure)                               |

| Standards               | IEC 60947-2                                    |

Core Features & Market Positioning

The Siemens 3VA1112-6ED42-0AA0 stands out in the competitive MCCB market due to its high breaking capacity of 70kA, providing superior protection against short circuits even in high-fault current environments. Its thermal-magnetic trip unit offers reliable and adjustable protection settings, allowing for fine-tuning to specific system requirements and preventing nuisance tripping. This series is recognized for its robust construction and Siemens' commitment to quality, positioning it as a dependable solution for critical infrastructure and industrial settings where equipment downtime is not an option. The 3VA11 series is designed for straightforward integration, minimizing installation complexity and reducing overall project timelines.

Key Application Scenarios

This Siemens 3VA11 circuit breaker is ideally suited for a wide range of industrial and commercial power distribution applications. It excels in main distribution panels, sub-distribution boards, and as protection for individual loads such as motor control centers, transformers, and critical machinery. The 4-pole configuration makes it suitable for systems requiring neutral conductor protection or isolation, common in three-phase power networks. Industries such as manufacturing, data centers, water treatment plants, and renewable energy facilities benefit from its reliable protection and high performance. Its 70kA breaking capacity is particularly valuable in areas with a high potential for short-circuit currents.

Practical System Integration Guidance

Integrating the 3VA1112-6ED42-0AA0 into existing or new electrical systems is streamlined due to its standard mounting options. It can be mounted on a standard DIN rail or directly to a panel using appropriate accessories. For optimal system performance and safety, ensure that the incoming and outgoing conductors are properly sized for the 125A rating and are securely terminated to prevent loose connections, which can lead to overheating. When installing auxiliary or signaling devices, such as undervoltage releases or auxiliary switches, consult the specific accessory documentation to ensure correct wiring and functional integration. Always follow local electrical codes and regulations during installation.

Operation and Risk Mitigation

Operating the Siemens 3VA11 circuit breaker involves understanding its trip mechanism. The thermal element provides protection against sustained overloads, while the magnetic element responds rapidly to high short-circuit currents. To reset the breaker after a trip, ensure the fault condition has been cleared, then manually move the operating lever to the "OFF" position and then to the "ON" position. If the breaker trips repeatedly, investigate the cause, which could range from persistent overload conditions to a short circuit. Risk mitigation is enhanced by ensuring the breaker is correctly rated for the protected circuit and that personnel are trained in safe operating procedures and lockout/tagout protocols.

Scalability & Long-Term Value

The Siemens 3VA11 series offers inherent value through its compatibility with Siemens' broader industrial automation and power distribution ecosystem. While the 3VA1112-6ED42-0AA0 is a fixed-configuration device, the 3VA family allows for future upgrades or expansions by selecting breakers with higher ratings or additional functionalities as system demands evolve. Integration with modern IIoT platforms is achievable through the use of optional communication modules, enabling remote monitoring, diagnostics, and predictive maintenance capabilities, thereby enhancing operational efficiency and long-term asset value.

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Frequently Asked Questions (FAQs)

What is the breaking capacity of the Siemens 3VA1112-6ED42-0AA0 circuit breaker?

The Siemens 3VA1112-6ED42-0AA0 features a substantial breaking capacity of 70kA at 400/415V AC.

This high rating ensures it can safely interrupt severe fault currents, protecting downstream equipment and personnel. It signifies a robust capability to handle fault conditions commonly found in industrial power distribution.

This specification is critical for ensuring system safety and compliance with international standards like IEC 60947-2.

How do I reset the Siemens 3VA1112-6ED42-0AA0 after a trip?

To reset this breaker, first, ascertain and rectify the cause of the trip.

Then, move the operating handle to the fully "OFF" position. Finally, move the handle to the "ON" position to re-energize the circuit.

Always ensure the fault condition is cleared before attempting a reset to prevent immediate re-tripping.

What are the primary applications for the 3VA11 Series Molded Case Circuit Breaker?

This breaker is designed for main and sub-distribution panels in industrial settings.

It's also ideal for protecting critical loads like motors, transformers, and machinery.

Its 4-pole design is suitable for systems needing neutral conductor protection or isolation.

Is the Siemens 3VA1112-6ED42-0AA0 suitable for DIN rail mounting?

Yes, the 3VA11 series, including this model, supports standard DIN rail mounting.

This facilitates quick and secure installation in standard electrical enclosures.

Appropriate accessories may be required depending on the specific mounting configuration.

What type of trip unit does the 3VA1112-6ED42-0AA0 use?

It utilizes a thermal-magnetic trip unit (TMD).

This provides reliable protection against both overloads (thermal) and short circuits (magnetic).

The TMD offers a dependable, fixed-setting protection characteristic.

Can I add auxiliary switches or undervoltage releases to this breaker?

Yes, optional accessories for auxiliary switches and various releases are available.

These accessories enhance the breaker's signaling and protection capabilities.

Consult the accessory catalog for compatibility and installation details.

What standards does the Siemens 3VA1112-6ED42-0AA0 comply with?

This circuit breaker complies with the IEC 60947-2 standard.

This international standard specifies the requirements for low-voltage switchgear and controlgear.

Compliance ensures the product meets rigorous safety and performance criteria.

What is the rated current of this specific Siemens circuit breaker?

The rated current for the Siemens 3VA1112-6ED42-0AA0 is 125 Amperes (A).

This indicates the maximum continuous current the breaker can safely handle.

Ensure this rating is appropriate for the circuit being protected.

What does "4P" mean in the product description?

"4P" signifies that the circuit breaker has four poles.

This means it can switch all four conductors (typically three phases and a neutral) simultaneously.

It's essential for applications requiring full isolation or protection of the neutral conductor.

How does the thermal-magnetic trip unit provide protection?

The thermal element protects against sustained overloads by reacting to heat buildup.

The magnetic element provides rapid protection against high short-circuit currents.

Together, they offer comprehensive overcurrent protection for the electrical system.