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The WOG package used for a diode bridge looks like this:

enter image description here

As I'm preparing a PCB layout footprint for this device, I need to assign pin numbers. Those pin numbers map to the schematic and ensure the pins are connected to the right circuit nodes in the PCB layout.

In studying the datasheet and doing a general web search on "wog package", I can't find mention of the pin numbering for the package.

Am I missing something?

If not and it's up to me to decide, I'd be inclined to make the top pin (+) pin 1, and then number counter-clockwise as viewed from the top. My rationale is that when viewing the component from the top, the printing is aligned such that the package flat is at a 45 degree angle and the (+) pin is at the top. Does that seem consistent with convention?

This would produce the following mapping:

  • 1: \$+\$
  • 2: ~ (A)
  • 3: \$-\$
  • 4: ~ (B)
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  • \$\begingroup\$ Note my edited answer. You've actually got the wrong numbering for what you said you wanted. \$\endgroup\$
    – Samuel
    Nov 19, 2015 at 23:16
  • \$\begingroup\$ Assign whatever numbers you want is my philosophy. BTW I'm amused by the abbreviation. 20 years ago people would think you a rasist!! \$\endgroup\$
    – Andy aka
    Nov 19, 2015 at 23:53
  • \$\begingroup\$ Ooh, I see what you're saying now after a quick Googling. That is an unfortunate package naming. I'm sure the Vishay folks meant no offense :) \$\endgroup\$
    – scanny
    Nov 20, 2015 at 0:57
  • \$\begingroup\$ Pretty much all bridge recitfiers are marked like this from the larger PBL 40x to the small DI10x. \$\endgroup\$ Nov 20, 2015 at 7:07

1 Answer 1

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The pins aren't numbered in this case, they're labeled.

If you want to assign numbers, the orientation and ordering you've chosen is consistent with some other pin numbering formats. It's worth noting that the diagram in the datasheet is the bottom view. They helpfully did not annotate that fact, but you can see it by looking at the 3D version and the diagram together:

enter image description hereenter image description here

If you wanted top view numbering, starting with upper left and counting counter-clockwise (to be consistent with most DIP packages) the numbering is actually:

1: ~ (A)
2: −
3: ~ (B)
4: +

Otherwise, if you only use this package for this rectifier and nothing else, just use the labels and not arbitrary numbers.

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  • \$\begingroup\$ Yes, I did notice they did that! Took me a second pass to work it out, I actually ended up just using the physical package I happen to have handy. Given it's not defined, I suppose my question comes down to what is the most conventional choice for pin 1. When the text on the top is aligned for reading, the pins are in a diamond shape, with the (+) pin at the top of the diamond. So I was figuring that for pin 1; especially since the second choice would be the "left" AC pin, which is ambiguous when only the label is known. \$\endgroup\$
    – scanny
    Nov 19, 2015 at 23:21
  • \$\begingroup\$ @scanny Good to catch that. It's a very common mistake for new EEs. At least this package is symmetrical, you could just rotate it after blowing up a few in testing, often that's not the case. Overall you'll find that there are at least as many standards as companies making datasheets. Pin 1 for upper left is usually a good bet though. \$\endgroup\$
    – Samuel
    Nov 19, 2015 at 23:27

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