Siemens 5SV3624-4 Miniature Air Circuit Breaker 2P 40A 300mA
The Siemens 5SV3624-4 Miniature Air Circuit Breaker (MCB) is engineered for robust protection in electrical distribution systems, offering superior safety and reliability. This 2-pole, 40A, 300mA residual current device (RCD) integrates overcurrent and earth fault protection within a compact form factor, simplifying installation and panel space. Its high breaking capacity ensures effective interruption of fault currents, safeguarding personnel and equipment from electrical hazards. The 5SV3624-4 stands out with its advanced tripping mechanisms and durable construction, making it a preferred choice for demanding industrial and commercial applications requiring stringent safety standards.
Product Specifications
| Feature | Specification |
| :----------------------- | :------------------------------------------ |
| Product Type | Miniature Air Circuit Breaker (MCB) |
| Number of Poles | 2P |
| Rated Current (In) | 40A |
| Residual Current (IΔn) | 300mA |
| Breaking Capacity (Icn) | 6kA (IEC 60898-1) |
| Tripping Characteristic | C (IEC 60898-1) |
| Voltage Rating (Un) | 400V AC (IEC 60898-1) |
| Frequency | 50/60 Hz |
| Terminal Type | Screw Terminals |
| Mounting | DIN Rail (35mm) |
| Environmental Protection | IP20 |
| Operating Temperature | -25°C to +45°C |
| Certifications | CE, CCC (depending on region/specific model) |
Core Features & Market Positioning
The Siemens 5SV3624-4 MCB is positioned as a dependable, mid-range protective device that balances cost-effectiveness with advanced safety features. Its integration of residual current protection directly into the MCB unit streamlines electrical panel designs, reducing the need for separate RCDs and associated wiring. This integration is a key differentiator, offering enhanced safety by detecting small, persistent earth leakage currents that could otherwise go unnoticed, preventing potential fires and electric shocks. The C-curve tripping characteristic is ideal for circuits with moderate inrush currents, common in motor and lighting applications, providing sensitive overload protection without nuisance tripping. Siemens' reputation for quality and durability further solidifies its market standing as a reliable component in critical power distribution networks.
Key Application Scenarios
This Siemens 5SV3624-4 MCB is ideally suited for a wide array of applications demanding reliable circuit protection and earth leakage detection. It is commonly employed in commercial buildings for protecting lighting circuits, socket outlets, and small power distribution boards. In industrial settings, it serves to protect individual machine circuits, control panels, and auxiliary power supplies, ensuring operational continuity and preventing damage from overloads or earth faults. Residential installations also benefit from its application in main distribution boards and sub-panels, providing essential safety for households. Its 300mA sensitivity makes it suitable for supplementary protection where the risk of earth faults is moderate, contributing to overall electrical safety compliance.
Practical System Integration Guidance
Integrating the Siemens 5SV3624-4 MCB into existing or new electrical systems is straightforward due to its standardized design. Installation involves securely mounting the 2-pole unit onto a standard 35mm DIN rail within a distribution board or enclosure. Terminals are clearly marked for line and neutral connections, accepting appropriate conductor sizes for its 40A rating. Ensuring proper torque is applied to the screw terminals is critical for secure electrical contact and preventing overheating. When connecting the residual current function, the line and neutral conductors must be routed through the MCB in the correct sequence as indicated on the device. For systems requiring RCD functionality, it is imperative to correctly identify and connect the incoming live and neutral conductors to the appropriate input terminals and the outgoing protected circuits to the output terminals.
Operation and Risk Mitigation
The Siemens 5SV3624-4 operates by continuously monitoring both overcurrent (overload and short-circuit) and earth leakage currents. When an overload or short circuit exceeds the device's tripping threshold, a bimetallic strip or electromagnet triggers a quick-release mechanism, opening the circuit to prevent damage. Simultaneously, the 300mA residual current detection monitors for imbalances between the line and neutral conductors, indicative of current leaking to earth. If this imbalance reaches 300mA, the RCD function activates, rapidly disconnecting the power. To mitigate risks, regular testing of the RCD function using the integrated test button is recommended. Avoid touching live terminals during installation or maintenance. Ensure the MCB is rated appropriately for the circuit's expected load and fault current levels.
Scalability & Long-Term Value
The Siemens 5SV3624-4 MCB offers significant long-term value through its compatibility with the broader Siemens Building Technologies and Industrial Automation ecosystems. While it is a standalone protective device, its modular design and standard DIN rail mounting ensure it integrates seamlessly with other Siemens circuit breakers, contactors, and control components within a common distribution panel. This compatibility facilitates future system expansions or upgrades, allowing for the addition of more circuits or higher-rated protective devices as system demands evolve. Furthermore, the robust construction and adherence to international standards ensure a long operational lifespan, minimizing the need for premature replacements and contributing to the overall reliability and cost-effectiveness of the electrical installation.
FAQs
Q1: What is the primary function of the Siemens 5SV3624-4 MCB?
This MCB provides overcurrent and earth leakage protection. It safeguards circuits from damage caused by excessive current. The device also detects unbalanced currents, preventing electrical shocks.
Q2: Can the Siemens 5SV3624-4 be used for residential applications?
Yes, it is suitable for residential main or sub-distribution boards. It offers crucial safety against faults and shocks. Proper installation by a qualified electrician is essential.
Q3: What does the "2P 40A 300mA" designation mean?
"2P" signifies two poles (line and neutral) protected. "40A" is the rated current capacity. "300mA" is the residual current sensitivity for earth fault detection.
Q4: How do I test the residual current function?
Press the "Test" button integrated on the front of the MCB. This simulates an earth fault. The MCB should trip, indicating the RCD function is operational.
Q5: What is the breaking capacity of this MCB?
The Siemens 5SV3624-4 has a breaking capacity of 6kA. This rating ensures it can safely interrupt fault currents up to 6000 Amperes. It is compliant with IEC 60898-1 standards.
Q6: What type of tripping characteristic does this MCB have?
This MCB features a Type C tripping characteristic. This is suitable for circuits with moderate inrush currents, such as motors and lighting. It offers sensitive overload protection.
Q7: Is this MCB compatible with other brands of circuit breakers?
It is designed for standard 35mm DIN rail mounting. While physically compatible, for optimal performance and safety, it's recommended to use within Siemens distribution systems.
Q8: What is the environmental protection rating of the 5SV3624-4?
The device has an IP20 rating. This means it is protected against solid objects larger than 12.5mm. It is not protected against water ingress and should be installed in an enclosure.
Q9: What is the operating temperature range for this MCB?
The Siemens 5SV3624-4 can operate within a temperature range of -25°C to +45°C. Performance and tripping characteristics may be affected outside this range. Ensure adequate ventilation.
Q10: Where can I find documentation for the Siemens 5SV3624-4?
Technical datasheets and installation manuals are available on the Siemens Industry Online Support (SIOS) platform. You can also consult Siemens distributors for product information.
