Hi, do you know what is the pat number of this transistor? I measured the below at the attached picture with the multimeter at the diode mode. I believe it is a PNP transistor but unfortunately, I can’t find any datasheet to confirm the SMD marking. Do you know in which part number corresponds the SMD marking at the attached picture?
Hello Oktabitt,
I tried searching for this transistor, but unfortunately I was unable to find any information on it to confirm the part number.
After doing a little digging, my best guess is a BCX51-06 PNP transistor. We don’t list such a part number in our system but we do list the BCX51 in several variants and made by several manufacturers. The plain BCX51 has an hFE range of about 63 to 250 under a standard set of conditions.
I believe that the “-06” represents a binning range of hFE, though I don’t know what that range would be. I can’t find info specifically on the “-06” suffix, but the other variants that are specified are as shown below:
- BCX51 → marking “AA”, hFE from 63 - 250
- BCX51-10 → marking “AC”, hFE from 63 - 160
- BCX51-16 → marking “AD”, hFE from 100 - 250
Noting the jump from “AA” to “AC”, it would seem reasonable that the “-06” would be marked with “AB”.
Here is the part marking format for Infineon transistors from the their BCX51 datasheet:
From the marking format shown, your part is most likely an Infineon part, though other brands should be comparable.
I can’t speculate as to what hFE range the “-06” might be, whether it’s a tighter sub-range, or possibly an extra wide range, given that no modern datasheets seem to show that variant. If it were me, I’d go for the BCX51-QX from Nexperia and hope for the best, as it has a slightly higher minimum hFE than some of the others and we have plenty of stock.
Thanks you very much for the help.
Seems quite plausible.
The only thing that gives me some pause is how they show the placement and orientation for “Rank” compared to the image of the part itself, as seen above. “S” is a valid rank option, so quite possibly right. I’m just not certain either way.
1 Like
I think it’s much simpler.
Photos of the 2SA1416T-TD-E transistor on various websites show similar markings as mentioned at the beginning of this thread.
3 Likes
Based on that, I fully agree.
Good call!
1 Like
Many thanks!!!
1 Like