Siemens 5SV3626-4 Miniature Circuit Breaker 2P 63A 300mA

The Siemens 5SV3626-4 Miniature Circuit Breaker 2P 63A 300mA stands as a robust solution for reliable overcurrent and short-circuit protection in various electrical installations. This 2-pole breaker boasts a 63A rated current and a sensitive 300mA residual current sensitivity, making it adept at safeguarding circuits against dangerous earth leakage faults. Its key advantages include enhanced safety, high breaking capacity, and dependable tripping characteristics, crucial for industrial environments.

Product Specifications

| Feature                   | Specification                                |

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

| Manufacturer              | Siemens                                      |

| Product Series            | 5SV3                                         |

| Type                      | Miniature Circuit Breaker (MCB)              |

| Poles                     | 2                                            |

| Rated Current (In)        | 63A                                          |

| Rated Residual Operating Current (IΔn) | 300mA                                        |

| Rated Voltage (Ue)        | 400V AC                                      |

| Frequency                 | 50/60 Hz                                     |

| Breaking Capacity (Icn)   | 6 kA                                         |

| Tripping Curve            | C                                            |

| Protection Type           | Overcurrent, Short-circuit, Earth Leakage    |

| Mounting Type             | DIN Rail                                     |

| Terminal Type             | Screw Terminal                               |

| Protection Class          | IP20 (enclosure), IP40 (front)               |

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

| Compliance Standards      | IEC/EN 60898-1, IEC/EN 61009-1               |

Core Features & Market Positioning

The Siemens 5SV3626-4 differentiates itself through its high breaking capacity of 6 kA, ensuring it can safely interrupt fault currents without damage, a critical factor in demanding industrial settings. Its Type C tripping curve provides optimal protection for circuits with moderate inrush currents, common in motor loads and lighting systems, striking a balance between preventing nuisance tripping and ensuring prompt fault clearance. The integrated residual current protection (300mA) offers essential safety against electric shock from earth faults, positioning this MCB as a reliable and versatile component for comprehensive circuit protection. This combination of features makes it a preferred choice for applications requiring both overcurrent and earth leakage protection in a single, compact device.

Key Application Scenarios

This Siemens Miniature Circuit Breaker is ideally suited for a broad spectrum of applications within industrial and commercial electrical systems. It excels in protecting main distribution boards, sub-distribution boards, and individual circuits in manufacturing facilities, workshops, and building services. The 2-pole configuration is particularly relevant for single-phase circuits requiring reliable switching and protection, such as those powering machinery, control panels, and sensitive electronic equipment. Its 300mA sensitivity makes it effective for supplementary protection against indirect contact, enhancing safety in areas where personnel may be exposed to potential earth leakage risks.

Practical System Integration Guidance

Integrating the Siemens 5SV3626-4 into existing electrical systems is straightforward due to its standard DIN rail mounting. Ensure the incoming live and neutral conductors are correctly connected to the corresponding terminals to maintain proper circuit functionality and residual current detection. For systems requiring precise coordination, the Type C tripping characteristic should be considered alongside other protective devices to ensure selective fault interruption. Always verify that the ambient temperature and environmental conditions comply with the specified operating range of -25°C to +45°C to guarantee optimal performance and longevity.

Operation and Risk Mitigation

The Siemens 5SV3626-4 operates by detecting overcurrents and short circuits, tripping rapidly to de-energize the protected circuit and prevent damage or fire hazards. Its built-in residual current detection provides an additional layer of safety, tripping when an imbalance between live and neutral currents exceeds 300mA, indicating a potential earth leakage fault and risk of electric shock. To mitigate risks, regular visual inspections for damage and periodic testing of the tripping function are recommended. Ensure proper isolation procedures are followed before any maintenance or wiring modifications to prevent accidental energization.

Scalability & Long-Term Value

While the 5SV3 series MCBs are primarily designed for direct circuit protection, their inherent reliability and adherence to international standards (IEC/EN 60898-1, IEC/EN 61009-1) ensure long-term value and compatibility within traditional electrical infrastructure. Siemens' commitment to quality manufacturing means these devices offer a robust and dependable lifespan when installed and operated within specified parameters. Although not directly IIoT-enabled, their consistent performance contributes to the overall stability of the electrical system, which can be a foundation for future smart grid integrations through compatible upstream or downstream monitoring devices.

FAQs

What is the breaking capacity of the Siemens 5SV3626-4?

The Siemens 5SV3626-4 Miniature Circuit Breaker features a substantial breaking capacity of 6 kA. This specification is critical for industrial applications where fault currents can be significantly high. It ensures the breaker can safely interrupt these powerful currents without sustaining damage, maintaining system integrity and operator safety.

What does 2P mean on the Siemens 5SV3626-4?

"2P" signifies that the circuit breaker is a 2-pole device. This means it simultaneously switches both the live (phase) and neutral conductors of a single-phase circuit. This configuration is essential for complete isolation and enhanced safety, particularly in applications requiring full disconnection of power.

What is the purpose of the 300mA rating on this MCB?

The 300mA rating refers to the residual operating current sensitivity. This indicates that the breaker will trip when it detects an imbalance of 300 milliamperes between the live and neutral conductors. This is a crucial safety feature designed to protect against electric shock from earth leakage faults.

Can the Siemens 5SV3626-4 be used for motor protection?

Yes, the Siemens 5SV3626-4, with its Type C tripping curve, is suitable for protecting circuits with moderate inrush currents, such as those encountered with motors. The Type C curve allows for higher starting currents without nuisance tripping, while still providing effective overcurrent protection once the motor is running.

How is the Siemens 5SV3626-4 installed?

Installation involves mounting the MCB onto a standard 35mm DIN rail, commonly found in electrical distribution boards. Ensure the incoming power supply is safely disconnected. Connect the line conductor to the appropriate terminal and the neutral conductor to its designated terminal, following correct wiring practices.

What is the difference between an MCB and an RCD?

An MCB (Miniature Circuit Breaker) primarily protects against overcurrents and short circuits. An RCD (Residual Current Device) specifically detects earth leakages. The Siemens 5SV3626-4 is an RCBO (Residual Current Breaker with Overcurrent protection), combining both MCB and RCD functions in a single unit.

What is a Type C tripping curve, and why is it used?

A Type C tripping curve is designed to trip between 5 to 10 times the rated current. This makes it ideal for circuits with inductive loads that experience high inrush currents upon startup, such as fluorescent lighting or small to medium-sized motors. It prevents nuisance tripping while still offering protection.

Where is the Siemens 5SV3626-4 typically applied in industrial settings?

This MCB is commonly found in industrial sub-distribution boards protecting machinery, control panels, and single-phase circuits. It's also utilized in commercial buildings for lighting and power circuits where reliable overcurrent and earth leakage protection is paramount.

Is this circuit breaker suitable for DC circuits?

The Siemens 5SV3626-4 is designed for AC (Alternating Current) circuits, specifically rated for 400V AC. It is not intended for use in DC (Direct Current) circuits, as DC circuits have different electrical characteristics and require specialized protective devices.

What maintenance is required for the Siemens 5SV3626-4?

While robust, it's advisable to perform periodic visual inspections for any physical damage. Functional testing of the tripping mechanism, including the residual current function, is recommended at regular intervals, typically annually or as per local electrical regulations, to ensure continued safe operation.