# I’m looking for this transistor 18 c6

**URL:** <https://forum.digikey.com/t/i-m-looking-for-this-transistor-18-c6/71524>\
**Category:** Discrete Semiconductor Products\
**Tags:** cross-reference, part-identification\
**Created:** [August 24, 2026, 11:26pm UTC](https://forum.digikey.com/t/i-m-looking-for-this-transistor-18-c6/71524 "2026-08-24T23:26:57Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![oscar2](https://avatars.discourse-cdn.com/v4/letter/o/bcef8e/32.png) [@oscar2](https://forum.digikey.com/u/oscar2)\
**Post date:** [August 24, 2026, 11:26pm UTC](https://forum.digikey.com/t/i-m-looking-for-this-transistor-18-c6/71524/1 "2026-08-24T23:26:57Z")

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![IMG_4528](https://global.discourse-cdn.com/digikey/original/3X/2/b/2b9846cbf723c47ba59f4181259e4e8967d00078.jpeg)

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**Author:** ![Nathan\_2268](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/nathan_2268/32/1883_2.png) [@Nathan\_2268](https://forum.digikey.com/u/Nathan_2268)\
**Post date:** [August 25, 2026, 12:03am UTC](https://forum.digikey.com/t/i-m-looking-for-this-transistor-18-c6/71524/2 "2026-08-25T00:03:29Z")

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@oscar2

I am sorry to say that I too am not having luck verifying this time at this time.

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**Author:** ![heke](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/heke/32/14420_2.png) [@heke](https://forum.digikey.com/u/heke)\
**Post date:** [August 25, 2026, 12:14am UTC](https://forum.digikey.com/t/i-m-looking-for-this-transistor-18-c6/71524/3 "2026-08-25T00:14:28Z")

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Hi @oscar2 ,

“18” yields only some pre-biased transistors, which do not apply here. If the code is “1B” then it could be BC846C or MMBT2222, i.e. a general purpose NPN. You’d need to measure the package dimensions for the correct case.

Cheeers, heke

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**Author:** ![rick\_1976](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/rick_1976/32/1571_2.png) [@rick\_1976](https://forum.digikey.com/u/rick_1976)\
**Post date:** [August 25, 2026, 12:22am UTC](https://forum.digikey.com/t/i-m-looking-for-this-transistor-18-c6/71524/4 "2026-08-25T00:22:45Z")

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Reading it as “1B” rather than “18” may suggest a generic small-signal NPN device of [2222 or 846 flavor.](https://www.digikey.com/short/tdnqb7nd)

Investigation of the circuit to further inform the idea is advisable.

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**Author:** ![Adam7](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/adam7/32/48093_2.png) [@Adam7](https://forum.digikey.com/u/Adam7)\
**Post date:** [September 10, 2026, 4:56pm UTC](https://forum.digikey.com/t/i-m-looking-for-this-transistor-18-c6/71524/5 "2026-09-10T16:56:51Z")

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Hi @oscar2 ,  
I assume this is a transistor BC846B from Shikues company.  
[BC846B](https://jlcpcb.com/partdetail/Shikues-BC846B/C5344595)

 ![image](https://global.discourse-cdn.com/digikey/original/3X/2/c/2cf8b0423dbadb1c1caa896c814daab720b54f92.jpeg)