Capacitor ID

Discussion in 'General Electronics Chat' started by markj, Dec 31, 2011.

  1. markj

    Thread Starter New Member

    Apr 29, 2009
    5
    0
    Sorry to repeat this past 2009 question but the project has came up again.
    Can any one help me with the identification of a capacitor I need to replace on a automotive control pannel. 12 V

    It has what looks like an H logo on the top followed by the ref 2096 then underneath in smaller letters 9845 which could be the date of manufacture.

    A recomended alternative would be great:)

    ie


    H
    2096
    9845



    Its coloured orange/red approx 15mm in diameter
    the panel was built buy Delco Electronics England

    Cap.jpg

    Thanks

    Mark
     
  2. EB255GTX

    Active Member

    Apr 30, 2011
    54
    2
    Looks like it could be a MOV... Can you show more of the PCB? What's the reason you want to replace this part?
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,194
    1,761
    I agree with the MOV suggestion. Looks like the Harris logo. I didn't know they made MOVs at some point. They were big into radio communications.
     
  4. jimkeith

    Well-Known Member

    Oct 26, 2011
    541
    100
    If the ceramic package has a mat finish, it is very likely a capacitor.
    If glossy, it is very likely a MOV.
    First GE made MOVs, then Harris and now Littlefuse.
    The "2096" may be a house number--manufactured to a customer's specification.
    To recommend a substitute we must know the application--a schematic may also be necessary.
    Do your best to read the 3rd line--it may offer an important clue.

    Generally, they are good if there is not a hole melted through the case or if the leads have not been blown off.
     
  5. markj

    Thread Starter New Member

    Apr 29, 2009
    5
    0
    Sorry no schematic - The PCB is for a dash unit on a GM auto so 12 volt. Its linked to the main inputs + and - and then a diode. The system is playing up only works after 5-10 mins from cold. So suspect this is used to start up the stepper motors. Also capacitor smells burnt? Info on Cap as follows.

    H (or M)?
    2096
    9845



    Thanks
    Mark
     
  6. SgtWookie

    Expert

    Jul 17, 2007
    22,194
    1,761
    Try unsoldering one leg of it, and see if it is shorted. If not, it could be good - at least you would know that it is not loading down your supply voltage.
     
  7. jimkeith

    Well-Known Member

    Oct 26, 2011
    541
    100
    GM, due to high volume, would very likely purchase to a specification rather than a specific part number. My guess is that it is a low voltage MOV to deal with the harsh automotive electrical environment--perhaps 18 to 22V
     
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