PCB Design – Use Cases for a Closed Solder Jumper on a PCB

pcb-designsymbol [~]

I've come across the the symbols for closed solder jumpers in design libraries, and now I came across one in a design. I get why you might include an open jumper that could be solder closed, but what is the use case for a solder jumper that is already closed in the pcb layer?

An example of the symbol:
Solder jumper closed symbol

Best Answer

In this case write protect is optional. And disabled by default.
Cut the trace if you want to enable it, link by solder to disable it.

Sometimes you have a need for normally closed solder jumpers.

Sparkfun: How to Work with Jumper Pads and PCB Traces