Siemens 5SV3342-6KK01 Miniature Circuit Breaker (MCB) 4P 25A 30mA
The Siemens 5SV3342-6KK01 Miniature Circuit Breaker (MCB) is a robust 4-pole, 25A, 30mA residual current device designed for comprehensive circuit protection. It excels in safeguarding electrical installations against overload, short circuits, and dangerous earth leakage currents, offering enhanced safety and reliability for commercial and industrial environments. Its key advantages include rapid fault detection, high breaking capacity, and dependable tripping performance, ensuring operational continuity and personnel safety. Technical parameters such as its rated voltage of 400V AC and tripping sensitivity of 30mA make it suitable for a wide array of applications where precise and sensitive protection is paramount.
Product Specifications
| Feature | Specification |
| :-------------------- | :------------------------------------------ |
| Product Type | Miniature Circuit Breaker (MCB) |
| Poles | 4 |
| Rated Current (In) | 25A |
| Residual Current (IΔn)| 30mA |
| Rated Voltage (Ue) | 400V AC |
| Tripping Characteristic| Type A (sensitive to pulsating AC residual currents) |
| Breaking Capacity (Icn)| 6 kA |
| Frequency | 50/60 Hz |
| Mounting Type | DIN Rail |
| Degree of Protection | IP20 |
| Operating Temperature | -25°C to +45°C |
| Standard | IEC/EN 61009-1 |
Core Features & Market Positioning
The Siemens 5SV3342-6KK01 MCB distinguishes itself through its advanced Type A residual current protection, making it highly effective against both sinusoidal alternating and pulsating direct residual currents. This broad protection capability positions it as a superior choice over standard Type AC devices in many applications. Its high breaking capacity of 6kA ensures it can safely interrupt fault currents, preventing catastrophic damage to electrical systems. Siemens' reputation for manufacturing excellence and product longevity further solidifies the 5SV3342-6KK01's market standing as a reliable, long-term investment for critical infrastructure.
Key Application Scenarios
This 4-pole MCB is ideally suited for use in residential, commercial, and light industrial settings where comprehensive protection against earth faults is a necessity. Common applications include protecting socket outlets, lighting circuits, and appliances that may generate pulsating DC residual currents, such as those found in electronics and variable speed drives. Its 30mA sensitivity makes it a standard requirement for circuits supplying areas with increased risk of electric shock, like bathrooms or outdoor installations, safeguarding against electrocution hazards. Furthermore, its 25A rating is suitable for feeders with moderate power demands.
Practical System Integration Guidance
Integrating the Siemens 5SV3342-6KK01 MCB into existing electrical panels is straightforward due to its standard DIN rail mounting compatibility. The device features clearly marked terminals for line and neutral connections on each of its four poles, ensuring correct phase and neutral isolation. For proper function, the incoming power supply should be connected to the upper terminals, and the outgoing load to the lower terminals. Ensure all connections are securely tightened to the specified torque to prevent overheating and ensure reliable operation. The unit’s design facilitates easy busbar connection for multi-pole configurations within distribution boards.
Operation and Risk Mitigation
The 5SV3342-6KK01 operates by continuously monitoring the current flowing through the live and neutral conductors. If an imbalance occurs, indicating current is leaking to earth, the device will trip and disconnect the circuit within milliseconds. This rapid response is crucial for preventing electric shock and mitigating the risk of fire caused by earth faults. Should a tripping event occur, users should first disconnect all loads from the affected circuit. Then, switch the MCB back on. If it trips again immediately, a persistent fault is present, requiring professional diagnosis and repair by a qualified electrician to ensure safety.
Scalability & Long-Term Value
While this specific MCB is a standalone protective device, its compatibility with the broader Siemens range of switchgear and distribution systems ensures excellent scalability. It can be seamlessly integrated into larger Siemens SIVACON or ALPHA distribution boards, allowing for expansion of protected circuits as needs evolve. The inherent reliability and durable construction of Siemens products mean the 5SV3342-6KK01 offers significant long-term value, minimizing maintenance requirements and replacement costs over the lifecycle of an electrical installation. Its adherence to international standards also ensures future compatibility with evolving electrical regulations.
Frequently Asked Questions
What is the primary function of a Siemens 5SV3342-6KK01 MCB?
This device provides essential protection against overcurrents and earth leakage faults. It safeguards electrical circuits from damage and prevents electric shock hazards. It is designed for reliable operation in demanding environments.
How does the 30mA sensitivity impact its application?
The 30mA rating means it detects very small current leakages to earth. This makes it ideal for circuits in wet areas or where personal safety is paramount. It offers enhanced protection against electrocution risks.
What types of residual currents can the 5SV3342-6KK01 detect?
This MCB, being a Type A device, detects sinusoidal AC residual currents and pulsating DC residual currents. This offers superior protection compared to Type AC devices in many modern applications. It is sensitive to a broader range of fault types.
Can this MCB be used for single-phase and three-phase circuits?
The Siemens 5SV3342-6KK01 is a 4-pole device, typically used for protecting circuits where all four conductors (line and neutral) require switching and protection. It is commonly found in distribution boards protecting both single-phase and some three-phase loads, ensuring complete isolation.
What does the "4P" designation signify in the product name?
"4P" indicates that the circuit breaker has four poles. This means it can simultaneously switch and protect four separate conductors, usually all three phases plus the neutral in a three-phase system, or in specific single-phase applications requiring neutral switching.
What is the breaking capacity (Icn) of this MCB?
The 5SV3342-6KK01 has a breaking capacity of 6 kA. This specifies the maximum fault current the MCB can safely interrupt without sustaining damage. It is suitable for installations where the prospective short-circuit current does not exceed this value.
Is the Siemens 5SV3342-6KK01 suitable for industrial environments?
Yes, this MCB is well-suited for light industrial applications due to its robust construction and 6kA breaking capacity. It provides reliable protection for machinery and distribution circuits in such settings. Its durable design ensures longevity.
How should I install the 5SV3342-6KK01 MCB?
Install it on a standard 35mm DIN rail within an appropriate enclosure. Connect the incoming power to the top terminals and the outgoing load to the bottom terminals. Ensure secure connections and proper torque.
What does "Type A" protection mean for this MCB?
Type A signifies its sensitivity to both AC and pulsating DC residual currents. This is crucial for detecting faults from modern electronic equipment, unlike standard Type AC devices. It offers enhanced safety for diverse electrical loads.
What steps should be taken if the MCB trips frequently?
If the breaker trips repeatedly, it indicates a persistent fault. First, disconnect all loads. If it still trips when re-energized, a professional electrician must diagnose and repair the circuit or connected equipment.
