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SMD Transistor SOT23 Housing: Deciphering SA5 47/U7, Temperature Recorder, Resistive Sensor

atc2 10446 4
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  • #1 16662159
    atc2
    Level 11  
    Hello

    I have been tired for a few days searching for the type of transistor that burned in the temperature recorder. The transistor is in an SOT23 housing
    - what I see on the housing is SA then next to a smaller number 5, then perpendicularly like 47 or u7
    This is not BC547, interestingly looking at the other one (it is on the PCB), there is only one diode transition between the upper (-) and lower right (+) feet, there is no other transition between the feet.

    The transistor is at the temperature sensor input, the sensor is resistive. The task of the transistor is to increase the voltage on this sensor. As the temperature increases, the sensor reduces resistance and pulls voltage towards ground

    Thank you in advance for all your help
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  • #2 16662188
    Anonymous
    Anonymous  
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  • #3 16662203
    FRANKOX
    Level 15  
    Hello ! According to the descriptions of SMD SA elements, this is a BSS123 transistor and it is an n-chanel mosfet 100V 0.17 A, SOT23. The abbreviation of the company is "Sie"
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  • #4 16662240
    atc2
    Level 11  
    many thanks, buy and i will let you know

    Added after 1 [hours] 20 [minutes]:

    ... Another question, can you tell where to find such a SMD catalog?
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