7805A INSULATED +5V 1.5 AMP  FIXED VOLTAGE REGULATOR.  These regulators are ideal replacements for damaged 5 volt regulators or for use in Arduino projects or your own DIY 5v regulator. Please see the pin out in the listing photos. I am a fully qualified TV 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.