| Electronics > Repair |
| Help identify Sot-23 part number marking starting with "E4" or "F1" |
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| varnasfix:
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! |
| fzabkar:
E4xx = SPX2431AM, 2.5V precision voltage reference https://www.maxlinear.com/ds/spx2431.pdf https://www.lcsc.com/datasheet/lcsc_datasheet_1810010516_MaxLinear-SPX2431AM-L-TR_C94430.pdf (Sipex) https://pt.aliexpress.com/item/1005006330033066.html (photo) https://www.lcsc.com/product-detail/Voltage-Reference_MaxLinear-SPX2431AM-L-TR_C94430.html (datasheet & photo) F1xx = SPX2431AM http://eric1688.com/mobile/product.aspx?id=390287 (photo) |
| varnasfix:
Thank you so much. You are an absolute legend! I must have gone through dozens and dozens of datasheets without any results :phew: |
| fzabkar:
--- Quote from: varnasfix on October 20, 2024, 10:39:00 pm ---I must have gone through dozens and dozens of datasheets without any results --- End quote --- I didn't have any luck with datasheets, either. Instead, I resorted to Google Images and an Aliexpress search (with images). |
| davedrosen:
Hi, This is my first post. There is handy app called SMD. You put in the code and it lists the devices. |
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