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I have started using Multisim.

I designed a 5V regulator and it works in simulation, now I want to export it to UtilBoard but I can not find the right package or footprint for my component as there are thousands of them in the database.

What I am looking for is common 1/4 Watt resistors, a pair of 100µF and 10µF electrolytic caps and one 0.1µF ceramic capacitor.

I only succeeded finding the right package for K317 regulator which happens to be TO220 package.

What is the best way and best place to look to find a package for the component. For example, how can I find the package type of a normal 1/4Watt resistor?

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I don't know about Multisim, but in gEDA the footprints for these kind of components follow a pattern:

XXXnnn[n]{P}

Where XXX is the type of component, and nnn[n] is the size in mils, and {P} is polarized.

For example:

  • ACY400 is a generic 400-mil passive component (such as resistor).
  • ALF300 is a 300-mil diode.
  • RCY100P is a polarized electrolytic capacitor with 100-mil lead spacing.

(Axx = Axial, Rxx = Radial)

If there is a search facility I would start by narrowing the list down to show just those of the size you are looking for - such as entering "400" for a resistor - then browsing through. You'll soon get to know what is what - of the thousands of footprints you'll regularly use a mere handful.

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  • \$\begingroup\$ Ok I found some clues in multisim. For the resistor there are lots of options like ackage type: "RES1300-700X250 Package manufacturer: IPC-2221A/2222 Pin Count: 2" So is RES1300 reffering to package type? Is it standard or you think it is only used by Multisim? Thanks. \$\endgroup\$ – Sean87 Jul 31 '11 at 16:46
  • \$\begingroup\$ That sounds like a 1300 mil resistor (quite large - 100 mil is 0.1") \$\endgroup\$ – Majenko Jul 31 '11 at 16:58
  • \$\begingroup\$ aaah I was thinking it is millimeters :P hate imperial units...reminds me of imperialism! Thanks. \$\endgroup\$ – Sean87 Jul 31 '11 at 21:11
  • \$\begingroup\$ Alo found out IPC is the PCB design standard. \$\endgroup\$ – Sean87 Jul 31 '11 at 21:12
  • \$\begingroup\$ This is why I love Altium. All the components in the libraries have both a compact identifier (as above) and a human readable description, and you can search both to find a component. \$\endgroup\$ – Connor Wolf Aug 1 '11 at 9:11
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A little late but for someone hows still looking, like i was....

  • Double click on the resistor.
  • Go to Value Tab.
  • Layout Settings.
  • Edit Package.
  • List item
  • Select package from data Base.
  • Look for the right package u want.
  • Select and Oks.

For the resistor look for Generic RES0.25.

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  • \$\begingroup\$ Indeed... it's very late! \$\endgroup\$ – Sean87 Mar 3 '18 at 14:15
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Here you can fin the answer in details

http://digital.ni.com/public.nsf/allkb/E81C051F276C5BE0862579E2006975D5

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  • 2
    \$\begingroup\$ Link only answers are strongly discouraged. \$\endgroup\$ – Matt Young Mar 6 '14 at 13:05

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