Siemens 5SV4442-0 Residual Current RCBO 4P 25A 100mA

The Siemens 5SV4442-0 Residual Current RCBO, a 4-pole, 25A, 100mA device, stands as a robust solution for advanced electrical protection. It offers superior safeguarding against earth faults, short circuits, and overcurrents, ensuring operational continuity and personnel safety in demanding industrial environments. This RCBO is engineered for high reliability, featuring a compact design for efficient panel space utilization and straightforward integration into existing electrical systems. Its key technical parameters include a rated current of 25A, a residual current sensitivity of 100mA, and a 4-pole configuration for comprehensive circuit coverage.

Product Specifications

| Parameter                     | Specification                 |

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

| Product Type                  | Residual Current Circuit Breaker with Overcurrent Protection (RCBO) |

| Manufacturer                  | Siemens                       |

| Series                        | 5SV4                          |

| Pole Configuration            | 4-Pole                        |

| Rated Current (In)            | 25 A                          |

| Residual Current (IΔn)        | 100 mA                        |

| Rated Voltage (Un)            | 400 V AC                      |

| Breaking Capacity (Icn)       | 6 kA                          |

| Tripping Characteristic       | Type AC                       |

| Frequency                     | 50/60 Hz                      |

| Operating Temperature Range   | -25 to +45 °C                 |

| Protection Class (enclosure)  | IP20                          |

| Terminal Type                 | Screw Terminals               |

| Mounting Type                 | DIN Rail (35mm)               |

Core Features & Market Positioning

The Siemens 5SV4442-0 distinguishes itself through its advanced arc-quenching technology and high breaking capacity, providing superior protection against electrical hazards compared to standard circuit breakers. Its Type AC tripping characteristic ensures effective detection of sinusoidal alternating currents, a common requirement in industrial settings. The 4-pole design offers simultaneous protection for all live conductors and the neutral, crucial for preventing dangerous voltage imbalances and ensuring full circuit isolation. This RCBO is positioned as a premium component for applications demanding stringent safety standards and operational reliability, making it a preferred choice for system integrators and maintenance professionals focused on risk mitigation and compliance.

Key Application Scenarios

This 4-pole RCBO is ideally suited for main distribution boards and sub-distribution systems in commercial and industrial facilities, particularly where protection against residual currents is mandated or highly recommended. It provides essential safety for equipment and personnel in areas with a higher risk of earth faults, such as manufacturing plants, workshops, and data centers. The 25A rating and 100mA sensitivity make it effective for protecting circuits supplying machinery, HVAC systems, and lighting installations. Its application is critical in ensuring compliance with electrical safety regulations and preventing downtime caused by electrical faults.

Practical System Integration Guidance

Integrating the Siemens 5SV4442-0 RCBO into existing electrical panels is designed to be efficient. It mounts directly onto a standard 35mm DIN rail, simplifying installation within most switchgear assemblies. For wiring, ensure all four poles (L1, L2, L3, and N) are correctly connected to the respective incoming power lines and outgoing protected circuits. The neutral conductor connection is essential for proper residual current detection. Always follow local electrical codes and manufacturer guidelines for proper terminal torque and connection procedures to ensure optimal performance and safety.

Operation and Risk Mitigation

The primary function of the Siemens 5SV4442-0 is to detect imbalances between the current flowing into a circuit and the current returning. When a fault occurs, such as current leaking to earth, the device quickly trips, interrupting the power supply and preventing electrical shocks or fires. In the event of a fault, the test button (typically marked 'T') can be used periodically to verify the RCBO's functionality. Troubleshooting typically involves identifying the source of the earth leakage. Common issues arise from damaged insulation, incorrect wiring, or overloaded circuits, all of which are mitigated by the RCBO's rapid response.

Scalability & Long-Term Value

The Siemens 5SV4442-0 RCBO benefits from Siemens' extensive ecosystem of electrical components, ensuring compatibility with a wide range of switchgear, busbars, and control devices. This compatibility facilitates future system expansions or upgrades without requiring a complete overhaul of the protection infrastructure. Its robust construction and adherence to international standards guarantee a long operational lifespan. While not inherently an IIoT device, its reliable fault detection contributes to overall system stability, which is a foundational element for advanced digital monitoring and control solutions by minimizing unexpected outages.

FAQs

Q1: What is the primary function of the Siemens 5SV4442-0 RCBO?

This RCBO provides combined protection against overcurrents and earth faults. It safeguards circuits from damage due to overloads and short circuits.

It also detects current imbalances, tripping rapidly to prevent electric shocks. This dual protection enhances safety for personnel and equipment.

The device is crucial for preventing fires and equipment damage caused by electrical faults in industrial and commercial settings.

Q2: What does "4P 25A 100mA" signify for this Siemens RCBO?

"4P" indicates it is a 4-pole device, protecting all live conductors and the neutral. This is vital for balanced protection in three-phase systems.

"25A" is the rated current, meaning it can continuously handle a load of up to 25 amperes without tripping.

"100mA" is the residual current sensitivity, meaning it will trip when it detects a leakage current of 100 milliamperes or more to earth.

Q3: Is the Siemens 5SV4442-0 suitable for residential use?

While it offers excellent protection, this specific model is often geared towards industrial applications.

The 100mA sensitivity is generally for main protection in commercial or industrial settings, not typically for individual circuits in homes.

Residential applications often use lower sensitivity RCBOs (e.g., 30mA) for personal protection, depending on local codes.

Q4: How do I install the Siemens 5SV4442-0 RCBO?

Mount the RCBO securely onto a standard 35mm DIN rail in the electrical panel. Ensure the rail is properly grounded.

Connect the incoming power supply lines to the designated top terminals and the outgoing circuit conductors to the bottom terminals.

Carefully wire all four poles, including the neutral, ensuring correct polarity and secure connections to prevent faults.

Q5: What is the breaking capacity of the Siemens 5SV4442-0?

The breaking capacity (Icn) of this RCBO is 6 kA (kiloamperes).

This means it can safely interrupt fault currents up to 6,000 amperes without being damaged.

A higher breaking capacity ensures protection even in systems with significant short-circuit potential.

Q6: Can I test the functionality of the 5SV4442-0 RCBO?

Yes, most RCBOs, including this Siemens model, feature a built-in test button.

Pressing the test button simulates an earth fault, causing the RCBO to trip. This verifies the internal tripping mechanism.

It is recommended to test the RCBO periodically, such as monthly, to ensure it remains operational.

Q7: What type of faults does the Siemens 5SV4442-0 detect?

It detects overcurrents, which include both overloads and short circuits.

Crucially, it also detects residual currents, indicating a potential leakage of electricity to earth.

This comprehensive detection prevents electric shock, equipment damage, and potential fires.

Q8: What does "Type AC" mean for tripping characteristic?

"Type AC" signifies that the RCBO is designed to detect sinusoidal alternating residual currents.

This is a standard characteristic suitable for most general-purpose applications where AC power is used.

It may not be suitable for detecting pulsating DC residual currents, which require Type A or Type B RCBOs.

Q9: Where is this Siemens RCBO typically used in an electrical system?

It is commonly installed in main distribution boards or sub-distribution panels.

It serves as primary protection for circuits supplying industrial machinery or essential services.

Its 4-pole design is particularly useful for protecting three-phase loads and ensuring complete isolation.

Q10: What is the long-term value of using Siemens RCBOs like the 5SV4442-0?

Siemens products are known for their durability and long operational life, reducing replacement costs.

Compatibility with other Siemens components ensures ease of system expansion and integration.

Reliable protection minimizes downtime, contributing to operational efficiency and protecting investments in electrical infrastructure.