USB-C is a modern, reversible connector standard that carries power (up to 240W), data, video, and audio. It replaces older USB-A, Micro-USB, and proprietary connectors.
USB-C physical standard: 24-pin connector, 8.4mm wide, fully reversible (no "right side up"), supports power delivery up to 240W via USB Power Delivery (PD) spec.
Data standards running over USB-C: USB 2.0: 480 Mbps (slow, legacy). USB 3.1 Gen 1: 5 Gbps. USB 3.1 Gen 2: 10 Gbps. USB 3.2: up to 20 Gbps (Gen 2×2). USB4: 40 Gbps (essentially Thunderbolt 3 over USB-C).
Video over USB-C: DisplayPort alternate mode (DP Alt Mode) sends video signal over USB-C, enabling single-cable connection to monitor + power delivery + data.
Power delivery: 5V/2A (basic charging), 5V/3A (fast), up to 48V/5A (240W for laptops). Devices negotiate power based on capability.
Universal appeal: USB-C is now standard on smartphones (iPhone 15+, all Android flagships), tablets, laptops, external SSDs, and even some gaming consoles. Older USB-A chargers not compatible — need USB-C wall adapter or hub.
Cable quality matters for high-wattage charging and high-speed data — cheap cables may not support full 240W or all data speeds.