What’s the Difference Between USB Power Delivery 3.0 and 3.1?

USB Power Delivery (USB PD) has evolved to meet the growing demand for faster charging and higher power in a compact form. USB PD 3.0 introduced improvements over earlier revisions, including enhanced negotiable power profiles, more efficient communication, and better support for fast-charging standards. As devices demand more power and smarter bargaining between charger and device, understanding the next updates helps you choose cables, chargers, and devices more confidently.

The key distinction between PD3.0 and PD3.1 lies in power delivery and electrical specifications. PD3.1 extends the maximum configurable output voltage and power delivery options beyond PD3.0, enabling higher wattage combinations and more granular control for power supplies. This translates to potential improvements in charging speed for high-power laptops and other devices that require substantial power, while preserving safety and compatibility with existing PD ecosystems.

Practical implications for consumers and manufacturers. For users, PD3.1-compatible chargers and cables may offer faster real-world charging in scenarios where devices can negotiate higher voltages (e.g., 28V, 36V, or 48V profiles). Manufacturers gain flexibility to design adapters and hubs that can scale power delivery more efficiently. However, full benefits depend on device support, cable ratings, and whether the ecosystem (host controller, sink device, and intermediary components) has been updated to PD3.1.

What to look for when upgrading or buying. Check product specifications for “PD 3.1” and confirm supported voltages and wattages beyond PD3.0 (for example, higher voltage/power profiles). Ensure your cables are rated for the intended PD level (look for appropriate USB-C cable standards). If you’re unsure, consult manufacturer documentation or seek professional guidance to ensure compatibility and safe operation across your devices.