What is this part an where can I get it?

Discussion in 'Electronics Resources' started by tbm700, Jul 24, 2013.

  1. tbm700

    Thread Starter New Member

    Jul 24, 2013
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    Hi all,

    I was wondering if anyone could help me identify this part or where can I buy from? I couldn't figuring out who was making this chip cause i been asking around and no one seem to be able to recognized it and I urgent need replacement part for this.

    Thanks all,
    Paul
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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  3. BillB3857

    Senior Member

    Feb 28, 2009
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    A Google search shows a tan speed control with the same number as shown on your device. What kind of unit is it in?
     
  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Its made by Motorola, looks like a Thyristor or a Triac, what is it doing speed control or dimming?
     
  5. wayneh

    Expert

    Sep 9, 2010
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    Since it says SCR210 right on it, I'd assume it's an SCR, also know as thyristor. It appears to be operated in forward voltage breakdown mode, where the gate is intentionally left open.

    Was that a battery charger?
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
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    It could be the Anode lead is cut but is common to the tab, and the tab makes the circuit connection when screwed to the Heat sink?
    Max.
     
  7. MrChips

    Moderator

    Oct 2, 2009
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    If you told us what unit it is out of that would help.
     
  8. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    Correct, it's a 2-leg SCR, the Anode must be connected at the heatsink tag, and heatsink is probably live. I haven't seen one of those SCRs in a long time.
     
  9. tbm700

    Thread Starter New Member

    Jul 24, 2013
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    It was a circuit board in my walkie forklift. Before it broke we were able to charge direct from wall 110v to 12v DC battery via converter. But now the DC Amp gauge no longer indicate charging and what we found was one of SCR210's leg was broken.
     
  10. THE_RB

    AAC Fanatic!

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    Did you try soldering the leg back together?
     
  11. MaxHeadRoom

    Expert

    Jul 18, 2013
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    The fact it is a charger (DC), it most likely IS a SCR, there is no sign of a circuit board connection for the centre lead, so it could be the tab that makes connection?
    If so and the part is defective (or broken), the part in post 2 could well do the trick, if re-soldering does not work?
    Max.
     
  12. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    The leg that was broken (middle ) will possibly be connected to the metal tab,
     
  13. tbm700

    Thread Starter New Member

    Jul 24, 2013
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    [​IMG]Hi all,

    If it was broke on the leg, I shouldn't have problem re-soldering but it was broken right at the bottom of the chip.

    [​IMG]
     
  14. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Board looks pretty badly corroded?
    It probably eroded away? :rolleyes:
    Let me guess. Battery electrolyte fumes?
    Max.
     
    Last edited: Jul 27, 2013
  15. MaxHeadRoom

    Expert

    Jul 18, 2013
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    In this application, the board should have been treated with conformal coating?
    Max.
     
  16. wayneh

    Expert

    Sep 9, 2010
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    And the dog not allowed to pee on it! :p
     
  17. LDC3

    Active Member

    Apr 27, 2013
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    I doubt it since there is oxidation around the IC.
     
  18. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    No they are made without a middle leg. The tag is used as the thrid connection. :)

    Re the corrosion; Yech! How big is this "12v battery" that this device will charge? You might be able to get rid of that old PCB and SCRs and put in a more modern solution.

    Even if that PCB still works it will not be for very long.
     
  19. tbm700

    Thread Starter New Member

    Jul 24, 2013
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    It used 2 deep cycle marine batteries
     
  20. tbm700

    Thread Starter New Member

    Jul 24, 2013
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    Actual board wasn't as bad as it look. We The battery wasn't fumes either.
     
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