App note: Identify surface mount part codes online

Posted on Saturday, March 31st, 2012 in app notes by DP

The SMD Codebook is a comprehensive internet database of the two and three letter codes used to mark small surface mount parts. This is an indispensable resource for repairing and reverse engineering SMD circuits.

SMD devices are, by their very nature, too small to carry conventional semiconductor type numbers. Instead, a somewhat arbitrary coding system has grown up, where the device package carries a simple two- or three-character ID code. Identifying the manufacturers’ type number of an SMD device from the package code can be a difficult task, involving combing through many different databooks. This HTML book is designed to provide an easy means of device identification. It lists over 3,500 device codes in alphabetical order, together with type numbers, device characteristics or equivalents and pinout information. Sometimes I’m asked to put IC information in the codebook. There is some information about ICs – but first and foremost the codebook is intended for discrete devices. Some ICs have been included, usually these are 3/4 pin devices or RF circuits I’m interested in.

This entry was posted on Saturday, March 31st, 2012 at 11:00 pm and is filed under app notes. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

7 Responses to “App note: Identify surface mount part codes online”

  1. Jaxxco says:

    it’s time to recycle the old salvaged boards!

  2. zelea2 says:

    SMD-codes DATABOOK (by Turuta @ MarcMiraj) is much more comprehensive. The 2011 edition has more than 170K codes. It also has case drawings, pinouts and manufacturer symbols.

  3. celia smith says:

    In my opinion, it is somewhat complicated. The numbers confused me. So, I had it researched and I came out with this certain website ( that has many illustrations that may help us understand better. I hope this will also help others.

  4. Usman Haider says:

    I am Usman Haider from Pakistan. Kindly send me datasheet of this code smd device (7333-A#). It is used in a circuit to which we can regulate 8 volts to 4 volts. I am waiting for your reply. I shall be very thankful to you for this favour. Thanks.

    Yours Sincerely,
    Usman Haider

  5. p.rameshbabu says:

    sir, i request you smd component identification

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