Maximum Length of Cables for USB Type-C Applications - KBA204034

Version: **

 

Question:

What is the maximum length of cables that can be used in Type-C applications?

 

Answer:

The USB Type-C specification provides the appropriate length for all types of USB Type-C cable assemblies based on cable performance requirements. Always use USB-IF certified cables for the required performance.

The following tables provide the recommended length for each Type-C standard assembly. 

 

USB Type-C Standard Cable Assemblies

                                                                                                                                                                        
Connector typeUSB
    Version
Cable
    length
Current
    Rating
USB Power
    Delivery USB-PD 2.0
USB Type-C
    Electronically marked
Type-C to Type-CUSB 2.0< 4m3 ASupportedOptional
5ARequired
Type-C to Type-CUSB 3.1
    Gen1
≤ 2 m3 ASupportedRequired
5ARequired
Type-C to Type-CUSB 3.1
    Gen2
≤ 1 m3 ASupportedRequired
5ARequired

 

USB Type-C Legacy Cable Assemblies

                                                                                                                                                                                                                                                                                            
Connector typeUSB
    Version
Cable
    length
Current
    Rating
USB Type-C
    Electronically marked
USB Standard A to
    USB Type-C
USB 2.0< 4m3 AOptional
USB PD Standard-A to
    USB Type- C
5 ARequired
USB PD Standard-A to
    USB Full-Featured
    Type-C
USB 3.1
    Gen2
≤ 1 m3 AOptional
USB PD Standard-A to
    USB Full-Featured
    Type-C
5 ARequired
USB Type-C to
    USB Standard-B
USB 2.0< 4m3 AOptional
USB Type-C to
    USB PD Standard-B
5 ARequired
USB Full-Featured
    Type-C to USB
    Standard-B
USB 3.1
    Gen2
< 1m3 AOptional
USB Full-Featured
    Type-C to USB PD
    Standard-B
5 ARequired
USB Type-C to
    USB Mini-B
USB 2.0< 4m500 mAOptional
USB Type-C to
    USB PD Micro-B
USB 2.0< 2 m3 AOptional
USB Full-Featured
    Type-C to
    USB PD Micro-B
USB 3.1
    Gen2
< 1 m3 AOptional

 

USB Type-C Legacy Adapter Assemblies

                                                                                              
Connector typeUSB
    Version
Cable
    length
Current
    Rating
USB Legacy
    Receptacle Type
USB Type-C
    Electronically marked
USB Type-C to
    USB Micro-B
USB 2.0< 0.15 m3 APD Receptacle
    Not Allowed
Optional
USB Full-Featured
    Type-C to USB
    Standard-A
USB 3.1
    Gen1
< 0.15 m3 APD Receptacle
    Not Allowed
Optional

 

The information in the tables is derived from the USB Type-C specification. Refer to section 3.1 of the USB Type-C specification for more details.