Based on this product's specifications, here are some alternatives and similar models
Adapter Harting 21033812401 4-pole straight connector
Summary description:
Harting adapter model 21033812401 is a straight 4-pole connector designed to provide reliable electrical connections in industrial and automation applications. The compact straight configuration houses four contact positions for signal or low-power circuits, enabling straightforward mating with compatible counterparts. Suitable for panel or cable mounting where a concise, durable 4-contact connection is required.