Based on this product's specifications, here are some alternatives and similar models
Mennekes 14112 PowerTOP Xtra Industrial Socket Coupler 63A 400V IP44
Summary description:
The Mennekes 14112 PowerTOP Xtra is a high-quality industrial socket coupler designed for reliable power distribution in demanding environments. Rated for 63A and 400V, this robust connector features an IP44 protection rating, ensuring resistance against splashing water and solid foreign objects. It is an essential component for professional electrical installations, providing a secure and durable connection for heavy-duty industrial equipment.