MC4 socket for 4/6 mm² cross-section and 5 - 6 mm cable diameter 905211

Female MC4 Connector for Photovoltaic Installations

This female MC4 connector is specifically designed for joining photovoltaic cables with cross-sections of 4 mm² and 6 mm². It is a key component in DC circuits, enabling safe and watertight connections for cables with a diameter of 5 to 6 mm. Thanks to the crimping plug design, installation is quick and does not require specialized soldering or traditional twisting tools—proper contact pressure is sufficient.

A key aspect of this solution is its resistance to atmospheric conditions. The connector has an IP 67 protection rating, meaning it is completely dust-tight and can be submerged in water for a short period (up to 1 meter for 30 minutes). This ensures the installation remains safe even during heavy rain or snow, preventing moisture from entering the electrical circuit. The housing is made of durable polyamide, which retains its mechanical properties across a wide temperature range—from -40°C to +90°C.

Inside the connector, there is a tinned copper contact, ensuring low transition resistance (only 0.35 mOhm) and minimizing the risk of overheating under load. For cables with cross-sections of 4 mm² and 6 mm², the connector handles a rated current of up to 30A, while for thinner cables (2.5 mm²), this limit is 22A. The maximum operating voltage is 1000 V according to IEC standards, making it compatible with most modern photovoltaic systems. Protection Class II guarantees additional safety without the need for grounding the housing.

Application and Operational Benefits

This connector is primarily used in PV modules and for connecting strings in solar installations. Its design allows for easy disassembly and reconnection when service or system expansion is required—the MC4 mechanism is an industry standard, facilitating the replacement of damaged components with other compatible products.

It is worth noting the specific benefits resulting from this product's construction:

• Installation Versatility: Perfectly suited for cables with a diameter of 5–6 mm, covering most standard solar cables (e.g., H1Z2Z2-K).
• Electrical Safety: Low contact resistance (0.35 mOhm) prevents excessive heating at the connection point at currents of 30A.
• Material Durability: The polyamide housing and tinned copper contacts are resistant to corrosion and UV radiation.
• Fast Installation: The crimping system eliminates the need for complex mounting tools for each connection.

Operating parameters vary depending on the cable cross-section used: for 2.5 mm² cables, the maximum current is 22 A, whereas for 4 mm² or 6 mm² cables (with an outer diameter of 5–6 mm), this value increases to 30 A. In all cases, the device operates safely at a rated voltage of 1000 V (IEC). Thanks to Class II protection and high voltage ratings, this connector is suitable for both small rooftop installations and larger solar farms, where the reliability of every connection point is critical to the overall system performance.