Specification

Form factor

USB-C

Specification

USB4

Max data

40 Gbps

Max power

240 W

Pins

24

Reversible

Yes

Introduced

2019

Cable cost

$$$$ (~$32)

USB4 / Thunderbolt 4 class ~1 m cable; e-marker and certification lift price. (as of 2026) Source: Manual US retail band for a ~1 m cable that supports this data tier (2026). Not host port BOM cost; not no-name bulk bin fantasy.

Status

Standard95

The connector path most new products are standardizing on right now.

Capabilities

• Data - This tier is rated for more than charge-only use.
• Power Delivery - Higher power is negotiated, not fixed at a few watts.
• Video out - The port class can carry a display signal.
• Rated cable required - A random USB-C cable may not hit the rated speed.
• Dock / multi-display class - Bandwidth class used for docks and multiple displays.

Notes

20 or 40 Gbps tiers exist; 40 Gbps needs a high-quality cable. Power up to 240 W needs USB PD 3.1 EPR. Not every USB4 logo means 40 Gbps or 240 W.

Seen on products

Flagship and reference products in this knowledge base that map a port to this tier.