1N4007 General Purpose Diode Basics
1N4007 is a member of 1N400x series, which is a family of popular 1 A general purpose silicon rectifier diodes. The blocking voltage of the series varies according to diode number, 1N4007 denotes 1000 volts. It is commonly used in AC Adapters, which is used in common household appliances.
General purpose diode is a two terminal semiconductor device. It allows current to pass only in one direction, from its anode to cathode.