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X****Liu
Choosing Package Sizes for Surface Mount Passives ?
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1
Jun 17.2019, 10:09:19
Hello,
I'm just getting into surface mount PCB design. I've only done one board for a class project, and the components supplied were all through hole. So before I get started on my first surface mount design, I'd like to understand the basics on this subject.
Q: How can I choose the correct package size for surface mount passive components? In other words, what factors drive the decision to use an 0603 SMD resistor/capacitor and opposed to using a 1608 package?
If anyone can provide information on this subject, I would greatly appreciate it.
Thank you in advance =)
I'm just getting into surface mount PCB design. I've only done one board for a class project, and the components supplied were all through hole. So before I get started on my first surface mount design, I'd like to understand the basics on this subject.
Q: How can I choose the correct package size for surface mount passive components? In other words, what factors drive the decision to use an 0603 SMD resistor/capacitor and opposed to using a 1608 package?
If anyone can provide information on this subject, I would greatly appreciate it.
Thank you in advance =)
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A****min
Jun 18.2019, 09:13:06
0603 imperial is 1608 metric.
Common sizes:
IMP MET
0201 0603
0402 1005
0603 1608
0805 2012
1206 3216
1210 3225
1808 4520
1812 4532
And there are bigger ones, mostly for high power stuffs.
The size is usually limited by voltage and power rating for resistors, and capacitance and voltage for capacitors.
Those factors limit the minimum size, not maximum size. You can always use larger package.
For instance, at 0402 size, you can get no more than 10uF for a 10V cap, but you can get the same or even smaller cap in a much larger package as well.
