Based on this product's specifications, here are some alternatives and similar models
Elcan MKI-3B-M Mini Screw Cable Connector 3x2.5mm IP68
Summary description:
The Elcan MKI-3B-M is a compact, screw-type cable connector designed for 3-core cables with a cross-section of 2.5mm. Featuring an IP68 ingress protection rating, this mini connector ensures a reliable, waterproof, and dust-tight connection for various electrical installations. It is ideal for outdoor or industrial environments where moisture resistance is critical for maintaining circuit integrity.