Based on this product's specifications, here are some alternatives and similar models
PCE 16A 5-pin 400V Red IP44 Socket-Outlet with Plug Model 515-6t
Summary description:
Industrial PCE socket-outlet with attached plug, rated 16A and 400V, 5-pin configuration and IP44 protection. Model 515-6t is a red, panel/portable power connector designed for three-phase equipment and temporary power distribution. Suitable for construction sites, workshops, event power and machinery requiring reliable waterproofed connectors.