Siemens 3VA1325-5MH32-0AA0 3VA13 Series Molded Case Circuit Breaker 250A 400A 3P 55kA

The Siemens 3VA1325-5MH32-0AA0 3VA13 Series molded case circuit breaker offers robust protection for industrial power distribution systems. This 3-pole breaker, rated for 250A with a maximum interrupt capacity of 55kA, ensures reliable safety and operational continuity. Its advanced thermal-magnetic tripping mechanism provides precise overload and short-circuit protection, crucial for safeguarding sensitive equipment and preventing downtime. The 3VA13 series is engineered for demanding environments, delivering exceptional performance and longevity.

Product Specifications

| Feature                      | Specification                                         |

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

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

| Series                       | 3VA13                                                 |

| Siemens Part Number          | 3VA1325-5MH32-0AA0                                    |

| Rated Current (In)           | 250 A                                                 |

| Number of Poles              | 3 (3P)                                                |

| Breaking Capacity (Icu/Ics)  | 55 kA at 400/415V AC                                  |

| Tripping Unit Type           | Thermal-Magnetic (TM)                                 |

| Adjustable Thermal Setting   | Not Specified (Typically fixed for this model series) |

| Adjustable Magnetic Setting  | Not Specified (Typically fixed for this model series) |

| Voltage Rating               | Up to 690V AC                                         |

| Frequency                    | 50/60 Hz                                              |

| Mounting Type                | Fixed, Front or Rear Connection                       |

| Terminal Type                | Box Lugs                                              |

| Accessories                  | Wide range of auxiliary and signaling switches        |

| Standards                    | IEC 60947-2                                           |

Core Features & Market Positioning

The Siemens 3VA1325-5MH32-0AA0 stands out in the competitive MCCB market due to its inherent Siemens quality and advanced protection capabilities. Its robust construction ensures mechanical durability, a critical factor in industrial settings. The 55kA breaking capacity provides a significant safety margin for fault currents, positioning it as a reliable choice for main power distribution and feeder protection. Unlike some competitors, the 3VA13 series integrates seamlessly into Siemens industrial automation ecosystems, offering enhanced control and monitoring possibilities when paired with compatible devices. This breaker is designed for applications demanding uncompromising reliability and adherence to stringent international safety standards.

Key Application Scenarios

This Siemens 3VA1325-5MH32-0AA0 circuit breaker is ideally suited for a wide array of industrial power distribution applications. It excels in protecting main incoming power lines in manufacturing plants, ensuring uninterrupted operation of heavy machinery. Its high breaking capacity makes it suitable for areas with potential for significant short-circuit events, such as substations and large commercial buildings. Common scenarios include use in motor control centers (MCCs), distribution boards, and as protection for transformers and generators where dependable fault interruption is paramount.

Practical System Integration Guidance

Integrating the Siemens 3VA1325-5MH32-0AA0 into existing or new electrical systems is straightforward, owing to its fixed mounting capabilities and standard terminal configurations. For front connections, ensure adequate clearance for busbar or cable lug termination. Rear connections offer a compact solution for panel building. When wiring, always adhere to local electrical codes and ensure proper torque is applied to the terminal lugs to prevent overheating. The breaker accepts a range of accessory modules for signaling (e.g., auxiliary switches for status indication) and remote tripping, which can be easily snapped onto the side of the breaker after installation. For optimal performance, ensure the ambient temperature around the breaker remains within its specified operating range to maintain accurate thermal tripping characteristics.

Operation and Risk Mitigation

Operating the Siemens 3VA1325-5MH32-0AA0 involves understanding its manual trip and reset functions. To reset the breaker after a trip, ensure the fault condition has been cleared, then move the operating handle to the "OFF" position and firmly push it to the "ON" position. Key risk mitigation strategies include regular visual inspections for signs of damage or overheating, and periodic functional testing of the tripping mechanism. While this model features a fixed thermal-magnetic setting, understanding its trip curves is essential for proper system coordination. Avoid nuisance tripping by correctly sizing the breaker and its associated loads. Always ensure authorized personnel perform maintenance and testing procedures.

Scalability & Long-Term Value

The Siemens 3VA13 series, including the 3VA1325-5MH32-0AA0, offers significant long-term value through its robust design and compatibility with evolving industrial automation trends. While this specific model is a fixed setting breaker, its ability to accept various accessory modules allows for future upgrades in monitoring and control capabilities. For enhanced digital integration, consider pairing it with Siemens communication modules that enable data logging and remote diagnostics, aligning with Industry 4.0 initiatives. Its mechanical endurance and resistance to harsh industrial environments ensure a long service life, minimizing the need for premature replacement and contributing to overall operational cost savings.

Frequently Asked Questions

What is the rated current of the Siemens 3VA1325-5MH32-0AA0?

The Siemens 3VA1325-5MH32-0AA0 molded case circuit breaker has a rated current of 250 Amperes. This specifies the maximum continuous current the breaker can safely handle without tripping. It's crucial for load calculations.

This 250A rating ensures it can protect circuits and equipment designed to operate within this current limit. Proper sizing is essential to prevent overheating and premature equipment failure.

Consider the continuous and peak load requirements when selecting this breaker to ensure optimal protection and operational reliability in your application.

What is the breaking capacity of the Siemens 3VA1325-5MH32-0AA0?

The Siemens 3VA1325-5MH32-0AA0 boasts a significant breaking capacity of 55 kA (kiloamperes). This indicates its ability to safely interrupt fault currents up to this level. It's a critical safety parameter.

A high breaking capacity, such as 55kA, provides a substantial safety margin against severe short-circuit events, protecting downstream equipment and personnel.

This specification is vital for applications in areas with higher potential fault current levels, ensuring compliance with electrical codes and standards for safety and reliability.

Can the Siemens 3VA1325-5MH32-0AA0 be used for motor protection?

While primarily designed for general power distribution, this breaker can be used for motor protection if properly coordinated. Its thermal-magnetic trip unit offers overload and short-circuit protection.

For specific motor protection, especially with frequent starting cycles, a breaker with adjustable overload settings or a dedicated motor protection relay might offer finer tuning.

However, for many standard industrial motor applications where the 250A rating and 55kA interrupting capacity are suitable, this breaker provides reliable protection against common fault conditions.