Wieland RST20i3 – Circular Connectors for Power Applications up to 250V

We carry the complete RST20i3 system from Wieland: individual connector parts for custom wiring, mounting frames for power outlets, and pre-assembled connection cables with Schuko plugs.

Connector Assemblies for Custom Wiring

The RST20i3S S1 ZR1 SW 20A connector is a 3-pole unit featuring a robust polyamide housing with CuZn contacts and integrated strain relief. For tight installation spaces, a 90° angled version with screw terminals is available.

Mounting Frames for Power Supply Outlets

The RST20i3 mounting frame is suitable for a 2-, 3-, 4-, or 5-pole M25 device connection and serves as the basis for a permanently installed power supply outlet, such as for your balcony power plant or an emergency power supply.

Pre-assembled connection cables with Schuko plugs

If you don’t want to assemble the cables yourself, you can opt for the pre-assembled RST20I3K1BF connection cables with an RST20i3 socket and Schuko plug, available in 4 m, 5 m, or 8 m lengths, each equipped with heat-shrink tubing and strain relief.

• What is an RST20i3 connector used for?

  It serves as a rugged circular connector for power applications up to 250V, such as for feeding solar power into the grid or for multi-phase and switching applications.

• What is the difference between the RST20i3 male connector and a pre-assembled connection cable?

  You mount the plug assembly yourself onto a cable of your choice; the pre-assembled connection cable comes ready-made with an RST20i3 receptacle and a Schuko plug in a fixed length.

• What do I need the mounting frame for the feed-in outlet?

  It securely holds the system outlet in place—for example, on the exterior wall of your home or in the meter cabinet—thereby enabling a permanent, fixed-installation feed-in outlet.

• What are the maximum voltage and current ratings of the RST20i3 system?

  The products in this category are rated for mains applications up to 250 V; the plug components are rated for currents up to 20 A.

• What length of connection cable should I choose?

  That depends on the distance between the feed-in point and the outlet—it’s best to measure the required length beforehand so you don’t end up with a cable that’s too short or unnecessarily long.

• Is the RST20i3 connector approved for balcony power plants?

  Wieland connectors are considered a particularly safe, lockable solution for grid connection and are preferred or required by some grid operators. Since requirements may vary depending on the grid operator, we recommend checking with your local grid operator beforehand.