USB Power Delivery 240W: what Revision 3.1 changed
A technical reference on when 240W arrived, the added voltage levels, cable context, and the currently published PD specification.
Primary-source backed
Topic hub
USB & Power
USB Power Delivery, USB-C cable capability, data performance, and compatibility decisions.
This is a discovery hub, not a standalone article. Most substantive assets are English originals, with a small Japanese-original set retained. Each card states the original language so discovery copy is never confused with a canonical translation.
Published knowledge
USB PD SPR vs EPR: understanding 100W through 240W
A concept guide separating standard and extended power ranges and the voltage levels behind 100W, 140W, 180W, and 240W.
Primary-source backed
How to verify a 240W USB-C cable: separate EPR, 5A, E-Marker, and certification
A 240W USB-C cable decision guide that separates EPR power capability, 5A operation, electronic cable identification, USB-IF certification, and data-rate requirements.
Primary-source backed
USB PD PPS vs fixed PDOs: why a PPS charger alone is not enough
PPS is the Programmable Power Supply feature of USB Power Delivery. It is only used when both the power source and the receiving device support it.
Primary-source backed
USB-C cable 60W vs 240W labels: read power capability first
USB-IF compliance labeling for USB-C to USB-C cables uses 60W or 240W to identify the cable’s power capability; the number does not describe every other feature of the cable.
Primary-source backed
USB-C data speed and power are separate: 80Gbps does not imply 240W
USB-IF expresses data performance as 5/10/20/40/80Gbps and USB-C cable power capability as 60W/240W. One number cannot be used to infer the other.
Primary-source backed
USB 80Gbps vs 40Gbps: reading USB4 Version 2.0 through performance labels
USB4 Version 2.0 introduced an 80Gbps-class physical layer, while USB-IF consumer labeling distinguishes products by explicit USB 80Gbps or USB 40Gbps capability.
Primary-source backed
Why a 240W-capable USB-C setup may stay near 100W
A 240W label on one component does not determine charging power. The source, cable, and receiving device must share a USB PD condition that supports the requested level.
Primary-source backed
How to verify a 5A USB-C cable: separate E-Marker, EPR, and 240W capability
A Japanese-original compatibility guide separating cable current capability and electronic identification from the charger and device power contract.
Primary-source backed
USB PD EPR voltage/current power envelope calculator
Calculate the arithmetic power represented by common USB PD fixed-voltage levels and a selected current, then keep that number separate from an actual negotiated contract.
Primary-source backed
USB4 v2 120Gbps asymmetric mode: what the 120/40 split means
USB4 Version 2.0 can use an asymmetric link configuration with up to 120Gbps in one direction and 40Gbps in the other; that capability is distinct from a symmetric 80Gbps link.
Primary-source backed
USB 5/10/20/40/80Gbps labels: what the speed number does and does not prove
USB-IF performance-language guidance uses data-rate numbers to communicate USB data capability; those numbers should not be treated as charging-power, connector-shape, or real-application throughput guarantees.
Primary-source backed
USB4 80Gbps end-to-end capability checklist
Check whether both endpoints, the cable, and the intended workload all support the capabilities required for an 80Gbps USB4 path before treating one product label as an end-to-end result.
Primary-source backed
USB-C capability matrix: power, USB data, and DisplayPort are independent checks
This reference matrix separates three capabilities that share a USB-C connector: USB Power Delivery, USB data performance, and DisplayPort Alt Mode or tunneled display support.
Primary-source backed