Need help identifying component

Discussion in 'General Electronics Chat' started by 2electrified, Oct 12, 2013.

  1. 2electrified

    Thread Starter Member

    Sep 5, 2011
    30
    0
    Hello Everybody,

    I need help identifying a component that needs replacing. On the PCB board it was labeled U3 - does this mean its an IC chip? The part is being replaced on another circuit. The top of it had popped.

    I tried searching 818 and 815y without any luck.

    I included a picture. Any help would be greatly appreciated.

    Thanks
    Lisa
     
  2. sheldons

    Active Member

    Oct 26, 2011
    616
    101
    It looks like an opto isolator...........
     
  3. 2electrified

    Thread Starter Member

    Sep 5, 2011
    30
    0
    Thank you. I was doing further research and I did finally come up with parts pointing towards opto isolator.

    Are you familiar with opto isolator? Reason for me asking is, I am noticing on some specs - input type is either AC or DC. Is the input type sensitive - meaning, The circuit I am working has 3 opto isolators - 2 are labeled 815Y and one is labeled 8141, and from my research 8141 shows input type AC. What happens if an AC type is in a DC circuit, does that hurt the circuit or visa vera? I am trying to match the current number 815Y and I don't wanna put a wrong part in. And wondering if I should swipe out 8141 and put 815Y in there - since the circuits runs in DC.

    What specs are important to pay attention to opto isolator?

    Thanks
    Lisa
     
  4. praondevou

    AAC Fanatic!

    Jul 9, 2011
    2,936
    488
  5. 2electrified

    Thread Starter Member

    Sep 5, 2011
    30
    0
    @praondevou - thanks for the info. I will read up on the links you have listed here.
     
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