Is it possible to turn on the current?

Question

Do it yourself

Good evening. There is a power connector, which has a maximum load of 30V 0.3A in the specification. Will it be possible to put a current of 0.8A through it at a voltage of 5V? Will he burn out? Will it get warm?

Answer 1

You can answer stupidly: since your parameters are higher than permissible, then you can’t, and that's it. But for a do-it-yourselfer, this is not obvious - there are too many attendant circumstances, and as they say, if you really want to, then you can .
Let's say the voltage is important only when the contacts break (burst spark / arc), and if you plug in / out without current, with the external power off, then your 5 or 30 volts (or even 220) - no difference. As for the current, there are also nuances. It's one thing - the current through the contacts: if the socket compresses the pin from several sides and, in addition, the surfaces are gilded, then even if the pin is thin, a couple of amperes can be passed through it. Another thing is the current through the wire and its connection to the contact. If the design of the connector is fundamentally made for a thin wire, and even for crimping, and not soldering, then it is better not to exceed the current. If you ignore the standard method and solder with a thicker wire, then again you can exceed it to the same pair of amperes.
All these considerations are purely from practice, which is quite rich. But it's up to you.

Answer 2

Was wrong

Answer 3

Nothing will happen! Try