Based on this product's specifications, here are some alternatives and similar models
Terminal rail connector Simet ZSG1-4.0Nc 2-conductor 4 mm² red
Summary description:
Simet ZSG1-4.0Nc is a 2-conductor terminal rail connector designed for secure electrical connections with conductors up to 4 mm². Finished in red for phase identification, it fits standard DIN-rail installations and provides reliable clamping for distribution blocks, control cabinets and industrial panels.