# Need help identifying an SMD

**URL:** <https://forum.digikey.com/t/need-help-identifying-an-smd/52801>\
**Category:** Discrete Semiconductor Products\
**Tags:** diodes, part-identification, onsemi\
**Created:** [March 18, 2025, 7:19pm UTC](https://forum.digikey.com/t/need-help-identifying-an-smd/52801 "2025-03-18T19:19:18Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![nwh212](https://avatars.discourse-cdn.com/v4/letter/n/a88e4f/32.png) [@nwh212](https://forum.digikey.com/u/nwh212)\
**Post date:** [March 18, 2025, 7:19pm UTC](https://forum.digikey.com/t/need-help-identifying-an-smd/52801/1 "2025-03-18T19:19:18Z")

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Hi! I’m relatively new to the board, but I’ve got an audio interface giving me issues. Long story short, I think it’s this component or another SMD around power delivery giving me issues, I’m gonna order a few to switch for safe keeping, but I can’t identify this one. Anybody have any ideas what it could be?

 ![20250318_120107](https://global.discourse-cdn.com/digikey/original/3X/7/f/7fec2d8068dba46aa5f0aeea117b853d869f0bb5.jpeg)

The identifying code reads VNN01 B34. I’ve looked around but I can’t figure out just what this is.

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**Author:** ![Brent\_2328](https://avatars.discourse-cdn.com/v4/letter/b/839c29/32.png) [@Brent\_2328](https://forum.digikey.com/u/Brent_2328)\
**Post date:** [March 18, 2025, 7:43pm UTC](https://forum.digikey.com/t/need-help-identifying-an-smd/52801/2 "2025-03-18T19:43:59Z")

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Hello,

Thank you for your inquiry.

I’m sorry, but I was not able to verify what that chip is based on those markings.

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<div class="post-metadata">

**Author:** ![nwh212](https://avatars.discourse-cdn.com/v4/letter/n/a88e4f/32.png) [@nwh212](https://forum.digikey.com/u/nwh212)\
**Post date:** [March 18, 2025, 8:08pm UTC](https://forum.digikey.com/t/need-help-identifying-an-smd/52801/3 "2025-03-18T20:08:13Z")

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Understood, any advice on identifying its function/a suitable replacement?

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**Author:** ![Kristof\_2649](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/kristof_2649/32/2325_2.png) [@Kristof\_2649](https://forum.digikey.com/u/Kristof_2649)\
**Post date:** [March 18, 2025, 9:19pm UTC](https://forum.digikey.com/t/need-help-identifying-an-smd/52801/4 "2025-03-18T21:19:40Z")

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It’s extremely likely your part is going to be [MBRS340T3G](https://www.digikey.com/en/products/detail/onsemi/MBRS340T3G/918645) made by [onsemi](https://www.digikey.com/en/supplier-centers/onsemi)

We have them in stock.

Snips from the datasheet:

 ![image](https://global.discourse-cdn.com/digikey/original/3X/d/c/dc601d02059f5f7cf4c3949e2efade3ad51b8e30.png)  
 ![image](https://global.discourse-cdn.com/digikey/original/3X/2/e/2eade19c8483c8c389cb2aa82ca4e7140638fa6a.png)  
 ![image](https://global.discourse-cdn.com/digikey/original/3X/2/b/2b4edee2467edc5089e74c427688d5676bf6a221.png)