Identifying a SMD transistor

Discussion in 'General Electronics Chat' started by R!f@@, Jun 29, 2016.

  1. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    I am having trouble trying to figure out this transistor. The silk screen number says Q703. So I figured it is transistor by looking at other components..
    Can any one identify the exact number of the part
    103.jpg
    The number is 130 .E.
    This is working from a working PCB.
    I need to replace a blown one from another PCB
     
  2. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
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    Any body ?
     
  3. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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    Can only suggest if you have a dvm, put it on diode and see if its pnp/npn,,,, otherwise its a fet.
     
  4. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
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    Ah ! That is an issue.
    I picture was taken while the unit is running. I cannot shut it down and it is not easily reachable.
    It's on a balcony edge.
     
  5. BobaMosfet

    Active Member

    Jul 1, 2009
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    11
    Are you sure it's an 'E'.... kinda looks like a 'w' --- This could be a transistor or a more complicated circuit in this package. Marking could be private-label.... very, very hard to tell. I'm looking through my SMD marking books to see if I can identify it.... do you know what year or decade this device is.. what is it (that would help a lot)?
     
  6. BobaMosfet

    Active Member

    Jul 1, 2009
    109
    11
    Here's its actual part #: BL8509-130ECRM

    It's a voltage detector with a delay by Shanghai Belling. I hope this next part formats ok:

    BL 8509 130 E C RM
    -- ---- --- - - --
    | | | | | |
    | | | | | +- Package Type: SOT-23-3
    | | | | +----- CMOS
    | | | +--------- 250mS
    | | +--------------- 1.30V (Detector Voltage)
    | +---------------------- Part Number
    +--------------------------- Mfg Code


    May have been made as custom part for contract, as opposed to generally produced.
     
  7. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
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    It's a Gree Inverter AC's Outdoor PCB.
    The circuit area is for the out fan driver. Some how insulation of two wires of Motor melted and shorted, blowing a resistor and a cap with that chip.

    Are you sure it is that part. I can't seem to find that data on Google.
    Do you have any data ?
     
  8. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
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    Aah ! I found the data by searching this part "BL8509"

    Cannot see the SMD marking code.
    I am confused here.
     
    Last edited: Jun 30, 2016
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