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Removed anode from my SCR

Discussion in 'General Electronics Discussion' started by jackorocko, Feb 29, 2012.

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  1. jackorocko

    jackorocko

    1,284
    1
    Apr 4, 2010
    Why would they cut off the anode pin on a SCR? Would make sense if the tab was electrically connected to the anode, but I looked at the datasheet and I didn't see where it stated this.

    http://cs.utsource.net/goods_files/pdf/22/22042_STMICROELECTRONICS_BTW69N1200.pdf

    edit: well the MM reassures me that my assumption the tab is electrically connected to the anode is true. The SCR is rated for 200V, wouldn't it be a pretty dumb idea to charge a heatsink to 200V??? Seems like when they cut off the anode, they limited the scope of this SCR to 40V or less to keep it rather safe.
     
    Last edited: Feb 29, 2012
  2. davenn

    davenn Moderator

    13,991
    2,018
    Sep 5, 2009
    If you look at the datasheet, top of page 3

    you will see that there 2 versions BTW69 - insulated and BTW69N uninsulated

    If you have the xxx69N version then the anode is connected to the tab and the tab will be soldered/bolted to the PCB for both heatsinking and anode operation :)

    Dave
     
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