I am designing a 4-layer PCB on which I have a trace that carries around 40A of current. The board will need to be tested at 125C. I need a way to physically disconnect this trace when needed. What's the best way to introduce a jumper on this trace?
Electronic – Best way of jumpering high current traces on PCB
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No, the holes through the board should be plated, which means that they are lined with metal that makes a good connection from front to back. In my experience, capillary action will suck the solder all the way through the holes anyway. However, it looks like you are planning to control some significant currents so you might want to make the traces that conduct large currents much fatter. I would also suggest adding a ceramic capacitor of 0.1uF or so right at the power pins of the microcontroller, in addition to the 22uF caps.
Yes, through-hole components will have copper pads on either side. Similar to this:
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Best Answer
A "Molex-like" PC-mount connector. With a mating plug with jumper wire(s).
Like the connectors used for the power plugs on computer motherboards.
Use as many pins in parallel as it takes to handle 40A