(20-08-2016, 10:48)Zappie Wrote: The BS250 was a hard one to get here. Ordered one at a online shop in Germany but i think it's not the right one. I'm not sure if it can be turned when soldering so also ordered e few in China with the Drain and Source swapped
Not an issue as long as you know the pinout. I bet the German shop provides the term-sheet? So you can check where each pin is located.
For example, the one I found is a SMD package I mounted underneath the PCB to match the pin-out.
With only 3 pins you can either mount yours on top or underneath the board - no other choice.