USB-C hubs can get warm or even hot while using them to transfer data or charge devices. This is because the electronic components and circuitry within hubs build up heat during use. Depending upon the hub’s material, heat can become trapped inside the hub leading it to become hot to the touch. If you are concerned about your hub becoming too hot during use, you may consider purchasing a hub made from metallic parts, such as aluminum, so that heat can more easily dissipate as it builds up.