# ON Semiconductor, TBG vs TCG Suffixes

**URL:** <https://forum.digikey.com/t/on-semiconductor-tbg-vs-tcg-suffixes/13538>\
**Category:** Integrated Circuits (ICs)\
**Tags:** part-numbering, power-management-pmic, onsemi\
**Created:** [April 9, 2021, 6:10pm UTC](https://forum.digikey.com/t/on-semiconductor-tbg-vs-tcg-suffixes/13538 "2021-04-09T18:10:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![raelynn.roen](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/raelynn.roen/32/46693_2.png) [@raelynn.roen](https://forum.digikey.com/u/raelynn.roen)\
**Post date:** [April 9, 2021, 6:10pm UTC](https://forum.digikey.com/t/on-semiconductor-tbg-vs-tcg-suffixes/13538/1 "2021-04-09T18:10:03Z")

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When searching for [ON Semiconductor](https://www.digikey.com/en/supplier-centers/on-semiconductor) parts such as [NCP114AMX330TCG](https://www.digikey.com/en/products/detail/on-semiconductor/NCP114AMX330TCG/5181648), you may find other parts with a TBG suffix, instead. The datasheet doesn’t indicate any difference, and yet a difference there is. What is it?

 ![image](https://global.discourse-cdn.com/digikey/original/3X/b/5/b5484d3128789a2300dcce13e8534333d3593e0e.jpeg)

The answer is in ON Semi’s [Tape and Reel Packaging Standards](https://www.onsemi.com/pub/Collateral/BRD8011-D.PDF) document, and has to do with the part’s orientation within the reel. ‘TBG’ indicates that Pin 1 of the part is in the upper-right corner of its pocket on the reel, while ‘TCG’ indicates the part is flipped 180 degrees, with Pin 1 in the lower-left corner. There’s no other significance to this part numbering switch; the parts themselves are identical in every respect.