What transistor would one recommend out of the jlcpcb SMT library that would be a basic equivalent to the bc547. All it's doing is controlling the brightness of an led, I'm not sure which one to pick out of what is available.
Your circuit is private so only you can see it.
Please read:
[https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)
To properly select an equivalent you need to show us your application or at least describe the max collector voltage and current and a circuit showing how you are driving the base of the BC547.
The JLCPCB parts list:
[https://jlcpcb.com/parts/componentSearch?secondSortUuid=65bdd51e95f94772bab043e587d091aa&name=Transistors%20(NPN/PNP)&firstSortUuid=6cb8980d2f8d498ba2169b6aedbeaafc](https://jlcpcb.com/parts/componentSearch?secondSortUuid=65bdd51e95f94772bab043e587d091aa&name=Transistors%20%28NPN%2FPNP%29&firstSortUuid=6cb8980d2f8d498ba2169b6aedbeaafc)
is not helpful because it is just a list of part numbers with minimal device spec info and no way to sort by parameters.
Starting with a datasheet for BC547:
[https://www.onsemi.com/pub/Collateral/BC550-D.pdf](https://www.onsemi.com/pub/Collateral/BC550-D.pdf)
The MMBT3904 is not an equivalent but it might be suitable:
[https://www.onsemi.com/pub/Collateral/MMBT3904LT1-D.PDF](https://www.onsemi.com/pub/Collateral/MMBT3904LT1-D.PDF)
You will have to do some simulation work or old fashioned maths to check it's suitability in your application.
This might make finding a part from JLCPCB a tiny bit faster but not much...
[https://jlcpcb.com/componentSearch/uploadComponentInfo](https://jlcpcb.com/componentSearch/uploadComponentInfo)
totally sorry dude. my bad. here is the schematic. It's just 12v driving a bicolor with a couple bc547 transistors and a pot to fade between them.
[https://easyeda.com/djlace/bc547](https://easyeda.com/djlace/bc547)
Try searching the JLCPCB online list for:
NPN 100mA 45V
or
NPN 100mA 50V
and see:
[https://easyeda.com/forum/topic/Please-make-JLCPCB-components-catalogue-sortable-and-searchable-like-LCSC-parts-lists-b8edafd3f2c34167aecf192710ff1a5a](https://easyeda.com/forum/topic/Please-make-JLCPCB-components-catalogue-sortable-and-searchable-like-LCSC-parts-lists-b8edafd3f2c34167aecf192710ff1a5a)
:)
I haven't tried but I think you may have a problem when you do Convert to PCB... because the User Contributed PCB Footprint assigned to the Schematic Symbol you have used for the pot both net names assigned to the pins. If you chek the connectivity using the Design Manager you may see errors flagged up.
If you need help just keep the project public and post back.
:)
Sorry, meant to add: (2.3) in (2) in:
[https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)
will give more of an insight to that.
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