Yes you can split the connector into two individual connectors, that are attached together with the aid of magnets. For my case when I am connecting an HP ZBook 15 G4, I am using both connectors attached (round: power supply - needs more than 100W, Thunderbolt 3: data). But when I am connecting a Lenovo X1 Carbon (5th gen), I am separating the two connector and I am using only the Thunderbolt (power & data).