Questions tagged [ipc]
IPC, the Association Connecting Electronics Industries, is a trade association whose aim is to standardize the assembly and production requirements of electronic equipment and assemblies.
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How do PCB trace width calculators find the coefficients from the IPC-2221?
PCB trace width calculators like this one and many others like it always quote at the bottom something like this,
For IPC-2221 internal layers: k = 0.024, b = 0.44, c = 0.725
For IPC-2221 external ...
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Why does IPC 2221 require so much more spacing at elevation?
In the IPC 2221 is a table that specifies the required trace spacing. One thing that I find very surprising is the jump once the elevation is above 3050m. E.g. For an external conductor (uncoated) at ...
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Which method can be used to properly fill a via-in-pad by hand?
Assume that you have a via hole inside a pad. Which method can be used to properly fill a via-in-pad by hand so it will be equal or similar as the protection of vias according to IPC 4761?
Which ...
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IPC 7251 annular ring meaning
When looking at IPC-7251 Table 3-3 (see the table in Sergei Gorbikov's answer at How to determine annular ring width for thru-hole pads?), for a through-hole pad in Level B the annular ring is given ...
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What IPC standard guides on the design of through hole PCB pads?
Through hole PCB pads need an annular ring and will have other details like the solder mask clearance. For pad that shall be used to solder component leads, I believe that there is some IPC guidance ...
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Altium hole tolerance vs IPC hole tolerance
I would like to start using the hole tolerances in Altium to provide more information to my fab house.
What I'm trying to figure out is the interaction with the IPC fabrication allowances I have ...
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Where can I find information about "Enhanced Policies and Procedures Exam" for IPC?
I'm taking the CSE test for IPC-J-STD-001 and at chapter 7.Certification Exam Overview, I can see that there are 3 types of tests.
Policy and procedure test (10 questions)
Closed book test (25 ...
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Soldering a Reed switch upside down into a slot
I would like to solder Coto reed switch CT10-2540-G1 upside down into a slot. It would recede into the slot until the tips of the lead touched the pads.
Is there an IPC standard regarding the minimum ...
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Should I use heat shrink tubing on solder connectors? [closed]
I learned soldering after IPC-J-STD-001 E during my apprenticeship 10 years ago and my instructor told me that you don't use heat shrink tubing on connectors, but recently I've seen a lot of this and ...
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How can I set clearance based on IPC-2221?
Below are two pictures.
The first picture is from IPC-2221. I made the second picture.
Which categories do the L1, L2, L3 and L4 clearances in the second picture belong to in the first picture at 310 ...
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IPC standards to ask manufacturer to assure a PCBA is correctly manufactured?
I'm preparing all the documentation to send to my PCBA manufacturing supplier and I wonder if there's a list of IPC standards to include in this documentation and verify they are compliant to them and ...
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If a PCB is inspected to an IPC-A-600 class higher than specified what are the negative impacts?
I have received several parts from a PCB manufacturer which should have been inspected to IPC-A-600 Class 2 but were instead inspected to IPC-A-600 Class 3.
I believe I have received PCBs inspected to ...
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IPC-B-25A test board schematic
I need to design an IPC-B-25A IPC multipurpose test board.
I have only following board image.
Board features are below:
Solder mask - None
FR4 Tg=175°C
Size - 4"x4.5" (10x11.4cm)
Thickness ...
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Do Professional Manufacturers Violate IPC Standards?
I lay out simple boards using BGA packages and often ignore my EDA tool's courtyards. I know these courtyards are set by IPC standards to allow for good design, but then I look at boards like the ...
user167743
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Intertrack spacing and decoupling cap package for high voltage buck regulator
We're routing a PCB for a LM5085 buck controller of 8 pin WSON package with a maximum input of 75V. My questions are for the relatively high input voltage
0603 is the smallest input decoupling cap I ...
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