Screw terminal rail connector STB 300-2 Al/Cu 87920 SIMBLOCK, green 81302005

Rail connector – a reliable connection for Al and Cu installations

The STB 300-2 SIMBLOCK rail connector is a solid and safe solution for connecting aluminum and copper wires in electrical installations. Designed for mounting on TS 35 rails and mounting plates, it provides a stable connection and easy system expansion. Its construction allows for the connection of both solid wires and stranded wires with ferrules, increasing its versatility.

Construction and application

The STB 300-2 connector has been designed for demanding applications where reliability and durability of connections are key. Made of high-quality materials, it guarantees resistance to environmental conditions and long-term use. Additional space for a measuring connection facilitates monitoring of installation parameters, and the dedicated OSTB 300 dust cover provides comfortable access to the measuring point. This connector is used in electrical switchboards, control cabinets and other installations requiring a safe and efficient connection of wires.

Key features and benefits

• Versatility: The ability to connect aluminum and copper wires in one connector eliminates the need for additional adapters.
• Large range of cross-sections: Supporting wire cross-sections up to 300 mm² (solid) and 240 mm² (stranded) allows for use in installations with varying loads.
• Safety: Rated current of 520A at 1000V AC/DC provides effective protection against overload and short circuit.
• Easy installation: The design adapted for mounting on TS 35 rails and mounting plates facilitates and speeds up installation.
• Additional functionalities: Built-in space for a measuring connection and a dedicated OSTB 300 dust cover increase functionality and comfort of use.
• Number of poles: Single-pole construction allows for flexible installation configuration.
• Adapted to different types of wires: Possibility of connecting both solid wires and stranded wires with ferrules (up to appropriate cross-sections).

Information on permissible wire cross-sections:

• Solid: from 150 mm² to 300 mm²
• Stranded wire with ferrule: from 120 mm² to 240 mm²
• Solid (measuring connection): from 1.5 mm² to 10 mm²
• Stranded wire with ferrule (measuring connection): from 1.5 mm² to 6 mm²

Using this connector is not only a solid electrical connection, but also makes the work of installers easier thanks to its well-thought-out design and additional functions such as the possibility of connecting a measuring connection without the need for additional elements. This solution will be appreciated by both professionals and people who independently deal with electrical installations.