Author Topic: Help identify Sot-23 part number marking starting with "E4" or "F1"  (Read 389 times)

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Offline varnasfixTopic starter

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Hello everyone!

I have "boiled" my head trying to identify a Sot-23 part from a pcb driving an IGBT module on an inverter.

In different production batches they have used two different sot-23 parts so there are two markings starting with "E4" or "F1" to help identify the part number.
Also in both occasions the part appears on the pcb both pins 1 & 2 are connected which would indicate towards a dual diode. However if we measure between pins 1 & 3 there is a diode in both ways...
Both transistor LCR testers I have don't even recognize it and message "part unknown ..." appears.

There are photos of both places that the part is used on the pcb.

Thank you!
 

Offline fzabkar

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« Last Edit: October 20, 2024, 11:28:43 pm by fzabkar »
 
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Offline varnasfixTopic starter

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Re: Help identify Sot-23 part number marking starting with "E4" or "F1"
« Reply #2 on: October 20, 2024, 10:39:00 pm »
Thank you so much. You are an absolute legend!

I must have gone through dozens and dozens of datasheets without any results

:phew:

 

Offline fzabkar

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Re: Help identify Sot-23 part number marking starting with "E4" or "F1"
« Reply #3 on: October 20, 2024, 11:15:37 pm »
I must have gone through dozens and dozens of datasheets without any results

I didn't have any luck with datasheets, either. Instead, I resorted to Google Images and an Aliexpress search (with images).
 

Offline davedrosen

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Re: Help identify Sot-23 part number marking starting with "E4" or "F1"
« Reply #4 on: October 20, 2024, 11:27:05 pm »
Hi, This is my first post.    There is  handy app called SMD. You put in the code and it lists the devices.
 

Offline varnasfixTopic starter

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Re: Help identify Sot-23 part number marking starting with "E4" or "F1"
« Reply #5 on: October 22, 2024, 08:05:30 am »
Thank both of you for the sharing the methodology.
Never thought of Google images.
It is indeed a great tool for as it "reads" text and numbers from the images. Very nice.

 


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