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Help needed identifying SOT23 with 43R symbol
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Topic: Help needed identifying SOT23 with 43R symbol (Read 311 times)
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fripp
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Posts: 4
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Help needed identifying SOT23 with 43R symbol
«
on:
November 26, 2024, 11:24:33 am »
Can anybody shed any light on what this component maybe (Symbol=43R, Package=SOT23). Center pin is grounded. I have tried all the repositories I know of but no matches for 43R only 43 which throws up many options.
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Last Edit: November 26, 2024, 11:31:36 am by fripp
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timeandfrequency
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Re: Help needed identifying SOT23 with 43R symbol
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Reply #1 on:
November 26, 2024, 12:36:14 pm »
Hello fripp,
Something like a
ZR431
(TL431) ?
If you can power the board, measure the voltage at pin 2 (Vz) : it should match to ± 2 % with the calculated value (SMD resistors circled in blue; I cannot read the values because of the limited resolution of the provided pictures). The formula can be found in the datasheet (see 'shunt regulator').
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Last Edit: November 27, 2024, 03:34:42 am by timeandfrequency
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fripp
fzabkar
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Re: Help needed identifying SOT23 with 43R symbol
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Reply #2 on:
November 26, 2024, 12:59:30 pm »
http://markingcodes.com/search/c/43r
https://www.google.com/search?q=filetype%3Adoc+OR+filetype%3Apdf+%22absolute+maximum%22+43r+sot23
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fripp
fripp
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Re: Help needed identifying SOT23 with 43R symbol
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Reply #3 on:
November 26, 2024, 02:04:51 pm »
Thanks I think I am on the right track now
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