Siemens 5SU9356-7KK06 RCBO Earth Leakage & Overload Protector 6A 30mA 1P+N C

The Siemens 5SU9356-7KK06 RCBO stands as a pivotal component in modern electrical safety, offering integrated earth leakage and overload protection for single-phase plus neutral circuits. This 6A, 30mA device, featuring a Type C tripping characteristic, is engineered for robust performance and reliability in demanding industrial and commercial environments. Its compact design and high breaking capacity ensure effective protection against electrical hazards, minimizing downtime and safeguarding personnel and equipment. The 5SU9356-7KK06 distinguishes itself through its seamless integration capabilities and adherence to stringent international safety standards, making it a preferred choice for engineers and system designers prioritizing safety and operational continuity.

Product Specifications

| Feature                      | Specification                               |

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

| Product Type                 | Residual Current Operated Circuit Breaker   |

| Model Number                 | 5SU9356-7KK06                               |

| Rated Current (In)           | 6A                                          |

| Rated Residual Current (IΔn) | 30mA                                        |

| Number of Poles              | 1P + N (Single Pole + Neutral)              |

| Tripping Characteristic      | Type C                                      |

| Rated Voltage (Un)           | 230V AC                                     |

| Rated Breaking Capacity (Icn)| 10kA                                        |

| Frequency                    | 50/60 Hz                                    |

| Terminal Type                | Screw Terminals                             |

| Mounting Type                | DIN Rail                                    |

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

| Compliance                   | IEC/EN 61009-1                              |

Core Features & Market Positioning

The Siemens 5SU9356-7KK06 RCBO offers a compelling combination of miniaturization and high protection levels, a hallmark of Siemens' commitment to advanced electrical engineering. Its integrated design consolidates the functions of a residual current device (RCD) and a miniature circuit breaker (MCB) into a single, space-saving unit. This dual protection is crucial for preventing electric shock, fire hazards, and equipment damage caused by earth faults and overcurrents. The Type C characteristic ensures it can handle moderate inrush currents associated with inductive loads without nuisance tripping, positioning it as a versatile solution for a wide range of applications where reliability is paramount. Siemens' reputation for quality and innovation further solidifies the 5SU9356-7KK06's market standing as a premium safety device.

Key Application Scenarios

This RCBO is ideally suited for protecting circuits in residential, commercial, and light industrial settings where single-phase power is prevalent. Common applications include the protection of lighting circuits, socket outlets, and individual appliances that pose a higher risk of earth leakage, such as those in kitchens, bathrooms, or workshops. Its 6A rating makes it particularly relevant for circuits with lower power demands, ensuring precise and sensitive protection. The 30mA sensitivity is the standard for personal protection against electric shock, making the 5SU9356-7KK06 a critical component in meeting safety regulations for general-purpose circuits. It is also an excellent choice for protecting sensitive electronic equipment that requires reliable power and safeguarding against transient faults.

Practical System Integration Guidance

Integrating the Siemens 5SU9356-7KK06 into existing or new electrical installations is straightforward due to its standard DIN rail mounting and familiar terminal configuration. Installation requires connecting the line and neutral conductors to the appropriate input terminals, ensuring correct polarity. The output terminals then connect to the protected circuit's load. For a 1P+N device, proper grounding of the system is essential, though the RCBO itself handles differential current detection. Wiring should always be performed by qualified electricians, adhering to local electrical codes and standards. The clear labeling of terminals simplifies the connection process, minimizing potential errors during installation and ensuring the device functions as intended to provide reliable earth leakage and overload protection.

Operation and Risk Mitigation

The Siemens 5SU9356-7KK06 operates by continuously monitoring the current flowing through the live and neutral conductors. If an imbalance occurs, indicating current leakage to earth, it rapidly trips and disconnects the power supply, typically within milliseconds. This rapid response is critical in mitigating the risk of electric shock and preventing fires. The overload protection function operates similarly to a standard MCB, tripping when the current exceeds the rated limit for an extended period, thus protecting wiring and equipment from thermal damage. Regular testing of the RCBO using its integrated test button is recommended to ensure the earth leakage detection mechanism remains functional.

Scalability & Long-Term Value

While the Siemens 5SU9356-7KK06 is a specific, fixed-rating device, its value lies in its compatibility with the broader Siemens SENTRON system and adherence to international standards. This ensures it can be seamlessly integrated into larger electrical distribution boards and systems built with other Siemens protective devices. Its robust construction and high-quality components contribute to a long operational lifespan, minimizing the need for premature replacement. For applications requiring higher current ratings or different tripping characteristics, Siemens offers a comprehensive range of RCBOs and MCBs that can be integrated within the same system architecture, providing a scalable solution for evolving electrical needs.

FAQs

What is the primary function of the Siemens 5SU9356-7KK06 RCBO?

The primary function is to provide combined protection against electrical overloads and earth leakage faults. It safeguards both personnel from electric shock and equipment from damage.

This device integrates the safety features of a circuit breaker and a residual current device into one unit. This dual functionality ensures comprehensive circuit safety in a compact form factor.

It detects imbalances in current flow, indicating a potential path to earth, and swiftly disconnects the power to prevent hazards.

Can the Siemens 5SU9356-7KK06 be used for overload protection only?

No, its design inherently includes both overload and earth leakage protection. It cannot be configured to disable one function.

The overload function operates like a standard circuit breaker, tripping on overcurrent conditions. This protects against circuit overloads and short circuits.

The earth leakage protection, with a 30mA sensitivity, is crucial for preventing dangerous shocks to users.

What does the "C" in 5SU9356-7KK06 RCBO signify?

The "C" denotes the tripping characteristic, indicating how quickly the breaker trips in response to overcurrents. Type C breakers are designed to tolerate moderate inrush currents.

This characteristic is suitable for circuits with inductive loads, such as motors or transformers, which can experience temporary high current surges upon activation. It helps prevent nuisance tripping.

It trips between 5 and 10 times the rated current (6A), offering a balance between protection and operational reliability for typical commercial applications.

How sensitive is the 30mA earth leakage protection?

The 30mA rating signifies that the device will trip when it detects a current leakage of 30 milliamperes or more. This level is considered the threshold for personal safety.

This sensitivity is crucial for protecting individuals from severe electric shock by quickly interrupting the circuit if a person comes into contact with an energized part.

It provides a high level of protection against electric shock in applications like domestic sockets, bathrooms, and outdoor installations.

What is the breaking capacity of the Siemens 5SU9356-7KK06?

The breaking capacity, specified as 10kA, indicates the maximum fault current the RCBO can safely interrupt without being damaged. This is a critical safety parameter.

A 10kA rating ensures robust protection against severe short-circuit faults, common in industrial and commercial electrical systems. It meets stringent IEC/EN standards.

This high breaking capacity guarantees the device will safely clear a fault, preventing further damage to the electrical installation and ensuring overall system integrity.

Is the Siemens 5SU9356-7KK06 suitable for single-phase or three-phase applications?

This specific model, 5SU9356-7KK06, is designed for single-phase plus neutral (1P+N) applications. It is not intended for three-phase circuits.

For three-phase systems, you would typically require multi-pole RCBOs or a combination of three-phase MCBs and RCDs. Always check the product's pole configuration.

Ensure correct wiring for single-phase circuits to guarantee proper operation and protection.

What are the typical installation environments for this RCBO?

This RCBO is suitable for a wide range of environments, including residential, commercial, and light industrial installations. It is designed for indoor use.

Its operating temperature range of -25°C to +45°C allows for installation in varied ambient conditions found in control cabinets and distribution boards.

It is vital to install it in a clean, dry environment to ensure long-term reliability and prevent premature failure.

How do I test the functionality of the Siemens 5SU9356-7KK06?

The device features an integrated test button, typically marked "T" or with a test symbol. Pressing this button simulates an earth fault condition.

When the test button is pressed, the RCBO should trip, disconnecting the circuit. This confirms the residual current detection mechanism is operational.

Regular testing, as per electrical safety regulations, is essential to ensure the device is functioning correctly and providing adequate protection.

What is the significance of the "6A" rating?

The "6A" refers to the rated operational current (In) of the circuit breaker portion of the RCBO. This is the maximum continuous current the device can carry without tripping.

It is crucial to select an RCBO with a current rating appropriate for the load it is protecting to ensure effective overload protection.

This 6A rating makes the 5SU9356-7KK06 suitable for circuits with lower power requirements, such as lighting or specific low-power appliance circuits.

Where can I find more detailed technical documentation for the 5SU9356-7KK06?

Detailed technical specifications, installation manuals, and compliance certificates are typically available on the official Siemens Industry website.

You can search for the product number "5SU9356-7KK06" on the Siemens support portal or product catalog. Look for datasheets or instruction manuals.

Always refer to the manufacturer's official documentation for the most accurate and up-to-date technical information and installation guidelines.