KIA7812A INSULATED +12V 1.5 AMP  FIXED VOLTAGE REGULATOR.  These regulators are ideal replacements for damaged 12 volt regulators or for use in Arduino projects or your own DIY 12v regulator. Please see the pin out in the listing photos. I am a fully qualified electronics engineer with over 30 years experience, so if you have any questions please ask and I will get straight back to you. Thanks for looking.