Terminal block screw type STB 50-3X Al/Cu 87330 SIMBLOCK, green/grey/blue 81004021

Rail-mounted threaded connectors for Al/Cu connections

The STB 50-3X threaded rail connector is a reliable solution for connecting aluminum and copper conductors, designed for demanding electrical installations. This product, from SIMBLOCK by SIMET S.A., combines a solid construction with precision manufacturing, ensuring safe and durable connections. It is particularly valued by installers for its versatility and ease of installation.

Construction and application

The STB 50-3X connector is designed for mounting on TS 35 rail or a mounting plate, providing flexibility in choosing the installation location. It allows the connection of three poles, and its construction has been optimized for efficient heat dissipation. The unique shape of the core and the ribbing of the housing minimize the risk of overheating the connection, even under high current loads. This is crucial for maintaining the stability and reliability of the installation over a long period of operation. This connector finds wide application in construction, industry, automation, and renewable energy systems.

Advantages and benefits

• Versatility: The ability to connect aluminum and copper conductors eliminates the need for additional adapters or transition connectors.
• High permissible current value: Both for aluminum and copper conductors, the rated current is 150A, allowing the connector to be used in circuits with high power consumption.
• Wide range of conductor cross-sections: Support for conductors with a cross-section from 6 mm² to 50 mm² (solid) and from 4 mm² to 35 mm² (stranded with ferrule) ensures compatibility with various types of installations.
• Safety: Thick housing walls prevent deformation during tightening of the conductors, and hex key screws with a fine thread guarantee a secure clamping force.
• Overheat protection: The special core design and housing ribbing effectively dissipate heat, increasing safety and connection life.
• Easy installation: The intuitive design simplifies and speeds up the installation process, saving time and reducing labor costs.
• Color coding: Availability in green, gray and blue colors facilitates the identification of individual phases or circuits in the installation.
• Durability: Made of high-quality materials resistant to corrosion and mechanical damage - a guarantee of long-term use.