Al/Cu terminal, 50-240 Al/10-95 Cu SM4.21

Aluminium-copper clamp – a reliable connection of wires

SM 4.21 clamp is a component dedicated to connecting aluminum wires with copper wires, providing a durable and safe connection in electrical installations. The clamp design allows connecting two copper wires of different cross-sections with one aluminum wire, which increases the flexibility of the installation. The clamp is prepared for mounting – cleaned and secured with contact paste, and its assembly is done with two M10 screws.

Construction and application

SM 4.21 clamp is designed to work with a wide range of wire cross-sections. The nominal cross-section of the aluminum wire is in the range of 50-240 mm², while for copper wires it is from 10 to 95 mm². These types of clamps are used in cable connections, electrical power distribution boards and everywhere where it is necessary to connect wires made of different materials. The through clamp channel for both the main and branch wire ensures easy assembly and disassembly. The galvanized surface of the clamp provides corrosion resistance and long-term reliability.

Key features and benefits

• Versatility: The ability to connect aluminum and copper wires in one clamp eliminates the need to use additional adapters or connectors.
• Safety: The use of contact paste minimizes the risk of short circuits and ensures optimal electrical conductivity.
• Durability: The galvanized surface of the clamp protects against corrosion, which extends its lifespan even in harsh environmental conditions.
• Easy installation: Two-screw mounting with M10 screws ensures quick and secure installation without the need for specialized tools.
• Flexibility: The ability to connect two copper wires of different diameters to one aluminum wire increases the flexibility of installation design.
• Application: Ideal for mechanically unloaded connections, which guarantees connection stability over time.