Questions:
1. How much current can standard 1.27mm or 2.54mm pin headers withstand when used as a board to board interconnect?
2. What is a better high current board to board interconnect solution that does not cost me an arm and a leg, easy to find, and can be hand soldered without hot air?
Background: I have been asking a few questions regarding designing a digitally controlled power supply module (actually a series of such modules, all using the same pinout) Now I need to get the power in and out of the modules. I was thinking about using standard 1.27mm or 2.54mm pin headers for this, since they are cheap, plentiful and easy to solder. However unlike the usual low voltage signal, I am running things rated for 50A or 100A current here.
Maximum ratings this interconnect would carry:
* Input voltage: 4.5V - 25V.
* Output voltage: 0 - 24V, lower than input voltage.
* Rated output current: 0-100A (M379,) 0-75A (M378,) 0-50A (M377,) 0-30A (M376,) 0-15A (M375.) All modules can withstand a few amps of overload given ample cooling.
* Control interfaces: I2C, CAN, RS485