USB cables heat up because they carry both high‑current power and data, whereas Ethernet cables mainly transmit low‑current differential signals, so they remain cool unless used for Power‑over‑Ethernet, which still draws far less current than fast‑charging USB.
The USB‑Type C connector introduces a reversible plug with E‑Marker‑enabled cables, supports up to 10 Gb/s data and 100 W power delivery, negotiates data and power roles via the CC pins, and uses the USB‑PD protocol over those pins to dynamically select voltage‑current profiles for fast charging.
The article reviews USB 3.0’s higher 5 Gbps (10 Gbps Gen 2) bandwidth, asynchronous transfers, burst and stream capabilities, explains the reversible Type‑C connector’s power‑delivery, dual‑lane data and DisplayPort alternate mode, and details USB 3.0 OTG role negotiation via CC pins together with Linux kernel and ConfigFS support.
