# Identifying smd code

**URL:** <https://forum.digikey.com/t/identifying-smd-code/36745>\
**Category:** Circuit Protection\
**Tags:** part-identification, transient-voltage-suppressors-tvs\
**Created:** [November 17, 2023, 6:16pm UTC](https://forum.digikey.com/t/identifying-smd-code/36745 "2023-11-17T18:16:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![overwijk](https://avatars.discourse-cdn.com/v4/letter/o/df705f/32.png) [@overwijk](https://forum.digikey.com/u/overwijk)\
**Post date:** [November 17, 2023, 6:16pm UTC](https://forum.digikey.com/t/identifying-smd-code/36745/1 "2023-11-17T18:16:46Z")

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Hello  
I need some help to identifying for the following 4 SMD components, I suspect they are TVS bidirectional diodes but I am not sure about this.The manufacturer was General Semicondoctor and is now Vishay. The the inscription on the components are: CK67A - CK5CA - CK64A and BBMGP37  
Dimensions are 5.3 x 3.4 mm I think smd package type 1812?  
I have searched the entire internet but cannot find any results.  
Various search engines also give no results. Hopefully someone of you knows these codes and which component it concerns. I know that the manufacturer has been taken over by Vishay, but on there site I don’t come across these codes also .

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**Author:** ![David\_1768](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1768/32/9762_2.png) [@David\_1768](https://forum.digikey.com/u/David_1768)\
**Post date:** [November 17, 2023, 6:36pm UTC](https://forum.digikey.com/t/identifying-smd-code/36745/2 "2023-11-17T18:36:31Z")

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Hello overwijk,

Pictures may help, but for the part markings you listed, I was not able to find any matches.