Cable of Printer: Identify the Socket, Buy Once
Printer cables fail in one of two ways: the wrong one bought, or a charge only one that powers the printer and transfers nothing.
Quick Answer
| Socket on the printer | Cable needed | Speed |
|---|---|---|
| Square USB-B | A to B, data capable | 480 Mbps |
| Wide square USB-B 3.0 | A to B 3.0 | 5 Gbps |
| RJ45 network port | Ethernet patch, Cat5e or better | Gigabit |
| USB-C | C to C, rare on printers | 5 Gbps |
| Centronics parallel | Legacy, adapter based | Historic |
Identifying the Socket
Square and bevelled
USB-B, the overwhelming majority of printers.
Square with a wider top
USB-B 3.0, on faster office machines.
Rectangle with a clip
RJ45. The printer joins the network, not a computer.
Trapezoid, five pins
Mini-B, on small photo printers and older portables.
Buying and Testing
- Match the socket exactly.
- Insist on data capability in the listing.
- Choose a length that reaches without tension.
- Connect and confirm the printer appears.
- Print a test page before filing the receipt.
Real-World Applications
- Home printer setup.
- Office printer relocations.
- Label printers in workshops.
- Replacing lost cables after a move.
Related Guides
For the B plug detail, read USB-B cable guide. For the peripheral cable, see USB-A USB-B cable guide. For network printing, start with category 6 patch cable.
FAQ
Why does my printer power on but not print?
A charge only cable powers the status light and transfers nothing.
Do I need USB 3.0?
Only if the printer has the wide socket. Most do not.
Can I use any USB cable?
Any that matches the socket and carries data.
Is wireless better?
Convenient, but wired is more reliable for shared printers.