elDalvini
@elDalvini@discuss.tchncs.de
- Comment on How come there are components in TO220 packages that supposedly take 100A with their small legs? 4 weeks ago:
From the IRF1404Z data sheet:
Calculated continuous current based on maximum allowable junction temperature. Bond wire current limit is 120A. Note that current limitations arising from heating of the device leads may occur with some lead mounting arrangements.
You need to design the PCB so that the heat from the legs can be properly dissipated, or they won’t live up to the rated current.
Also, traces on a PCB are much thinner than those legs. A trace with the same cross-sectional area would be impractically wide.
- Comment on Whats the best website to get Electronic components for small projects in Europe/Germany? 6 months ago:
If you can wait a couple weeks, AliExpress is going to be the cheapest.
eBay may be a bit more expensive, but it’s often my go-to because you can find everything and usually there are options with short shipping times.
For not too obscure parts, I would look at Reichelt, their prices are surprisingly low (especially if you bundle your orders to save on shipping costs).
- Comment on Optimal PSU fan placement 7 months ago:
It looks like you would want an even airflow through the whole PSU. The main heat-generating components are using the sides of the housing as a heat sink. I’m guessing the fan is mostly so the air inside the housing doesn’t get too warm, not to cool individual components.
Where is the original air exhaust? If it’s near the bottom of the picture, that would confirm my theory. In that case, I would keep the fan placement as close to original as possible (i.e. the blue square).