Siemens 3VA1110-3ED42-0AA0 Standard Molded Case Circuit Breaker (MCCB) 100A 4P 25kA

The Siemens 3VA1110-3ED42-0AA0 is a robust 100A, 4-pole, 25kA Standard Molded Case Circuit Breaker (MCCB) engineered for reliable electrical protection in diverse industrial environments. This MCCB distinguishes itself through its compact design, high breaking capacity, and superior performance, making it an ideal choice for safeguarding power distribution systems against overloads and short circuits. Its advanced thermal-magnetic tripping mechanism ensures prompt and precise fault interruption, enhancing operational safety and equipment longevity. With a focus on ease of installation and maintenance, the Siemens 3VA1110-3ED42-0AA0 offers a cost-effective and dependable solution for demanding applications.

Product Specifications

| Feature                | Specification                               |

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

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

| Siemens Model Number   | 3VA1110-3ED42-0AA0                          |

| Rated Current (In)     | 100A                                        |

| Number of Poles        | 4P                                          |

| Breaking Capacity (Icu) | 25kA                                        |

| Frame Size             | 3VA1                                        |

| Tripping Unit          | Thermal-magnetic                            |

| Mounting Type          | Fixed                                       |

| Terminal Type          | Screw Terminal                              |

| Voltage Rating (AC)    | 400/415V                                    |

| Frequency              | 50/60 Hz                                    |

| Protection Class       | IP20 (main circuit)                         |

Core Features & Market Positioning

The Siemens 3VA1110-3ED42-0AA0 MCCB stands out in the industrial market due to its exceptional combination of a compact footprint and a significant 25kA breaking capacity, offering substantial protection within a space-saving design. This makes it particularly advantageous in control panels and distribution boards where space is a premium. The integrated thermal-magnetic trip unit provides reliable, dual-level protection against sustained overloads and instantaneous short circuits, a critical feature for preventing equipment damage and ensuring system uptime. Its robust construction and adherence to stringent international standards, such as IEC 60947-2, position it as a dependable choice for engineers and specifiers prioritizing safety, reliability, and performance in their electrical infrastructure. Siemens' reputation for quality engineering further solidifies the 3VA1110-3ED42-0AA0's market appeal as a long-term investment in electrical safety.

Key Application Scenarios

This Siemens 3VA1110-3ED42-0AA0 MCCB is extensively utilized in main distribution boards and sub-distribution boards within commercial buildings, industrial facilities, and data centers, providing essential protection for busbars and outgoing feeder circuits. It is an optimal solution for safeguarding motor control circuits, protecting critical machinery and pumps from damaging overcurrent conditions, and ensuring the continuity of operations in manufacturing plants. Furthermore, its application extends to power generation and renewable energy installations, where reliable protection of generators and inverters is paramount. The 4-pole configuration ensures complete isolation for three-phase systems, crucial in scenarios requiring comprehensive safety during maintenance or fault conditions.

Practical System Integration Guidance

Integrating the Siemens 3VA1110-3ED42-0AA0 MCCB into existing electrical systems is straightforward due to its fixed mounting and standard screw terminal connections. For installation, ensure the MCCB is securely mounted onto a suitable DIN rail or panel, adhering to local electrical codes and manufacturer guidelines. Proper torque must be applied to the terminal screws to ensure reliable electrical contact and prevent overheating. When wiring a 4-pole breaker, connect the incoming L1, L2, L3, and Neutral conductors to the respective input terminals, and the outgoing load conductors to the output terminals. For systems requiring remote signaling or additional protection functions, auxiliary switches (e.g., for trip signaling) and shunt trip releases can be easily fitted to the MCCB, enhancing its operational intelligence and integration capabilities within SCADA or building management systems.

Operation and Risk Mitigation

The Siemens 3VA1110-3ED42-0AA0 operates by continuously monitoring the current flowing through its protected circuit. The thermal element, responsive to prolonged overcurrents, trips the breaker to prevent overheating and potential fires. The magnetic element provides instantaneous tripping for severe short-circuit currents, rapidly interrupting the power flow to prevent catastrophic damage to equipment and wiring. To mitigate risks, always ensure the MCCB is de-energized before performing any maintenance or wiring. Regular visual inspections for damage or signs of overheating, along with periodic functional testing, are recommended to maintain optimal performance and reliability. Familiarity with the breaker's tripping characteristics is essential for understanding fault behavior and effective troubleshooting.

Scalability & Long-Term Value

The Siemens 3VA1110-3ED42-0AA0 offers excellent long-term value through its robust design and compatibility with the broader Siemens SENTRON protection device portfolio. While this specific model is a standard MCCB, its integration into larger Siemens electrical distribution systems allows for future upgrades or expansion. For enhanced monitoring and communication capabilities, compatible accessory modules can be added, enabling integration into Industrial Internet of Things (IIoT) platforms and digital energy management systems. This provides valuable insights into system performance, predictive maintenance, and remote operational control, ensuring the electrical infrastructure remains adaptable to evolving technological demands and business needs.

Frequently Asked Questions (FAQs)

What is the breaking capacity of the Siemens 3VA1110-3ED42-0AA0?

The Siemens 3VA1110-3ED42-0AA0 has a breaking capacity of 25kA. This specification indicates the maximum fault current the breaker can safely interrupt without sustaining damage. It is crucial for ensuring protection against severe short circuits in industrial power systems.

This high breaking capacity ensures the device can protect downstream equipment and personnel even under extreme fault conditions. It is rated according to IEC 60947-2 standards, a benchmark for circuit breaker performance.

The 25kA rating is suitable for many standard industrial and commercial applications where fault levels are within this range. Always verify system fault levels against the MCCB rating before installation.

Can the Siemens 3VA1110-3ED42-0AA0 be used for motor protection?

Yes, the Siemens 3VA1110-3ED42-0AA0 can be used for motor protection applications. Its thermal-magnetic trip unit provides overload and short-circuit protection essential for motors. For precise motor starting current characteristics, ensure the trip settings are appropriately configured.

Motor protection requires careful consideration of starting current surges. The adjustable thermal element allows for setting appropriate overload protection levels to accommodate these temporary surges without nuisance tripping.

When selecting an MCCB for motor protection, it is advisable to consult motor manufacturer specifications and relevant electrical codes to ensure optimal performance and safety. Correct sizing and settings are critical.

What are the dimensions of the Siemens 3VA1110-3ED42-0AA0?

The Siemens 3VA1110-3ED42-0AA0 is designed to be compact for space-saving installations. Specific dimensions are typically available in the product datasheet. Its compact frame size (3VA1) allows for high-density panel building.

Engineers often specify this MCCB for applications with limited space in control cabinets or distribution boards. The dimensions are standardized within the 3VA series for consistent integration.

For exact measurements, including width, height, and depth, refer to the official Siemens technical documentation or product catalog. This ensures accurate planning for panel layouts and mounting.

How do I install an auxiliary switch on the Siemens 3VA1110-3ED42-0AA0?

Auxiliary switches for the Siemens 3VA1110-3ED42-0AA0 are typically clip-on accessories. Installation involves disengaging the breaker from power and then snapping the auxiliary switch into the designated slot on the side of the MCCB.

These switches provide valuable status feedback, such as trip indication or circuit breaker status (ON/OFF). They are essential for remote monitoring and integration into control systems.

Ensure the correct type of auxiliary switch is chosen for the intended signaling function. Refer to the Siemens accessories catalog for compatible models and detailed installation instructions.

What is the protection class of this MCCB?

The Siemens 3VA1110-3ED42-0AA0 has a protection class of IP20 for the main circuit. This rating signifies protection against solid objects greater than 12.5mm in size.

IP20 protection means the internal components are shielded from direct contact by fingers. However, it does not offer protection against moisture or dust ingress.

For environments requiring higher ingress protection (e.g., against water or fine dust), consider enclosing the MCCB within a suitable IP-rated enclosure or selecting an MCCB with a higher IP rating.