What is a avalanche diode? All Questions › Category: Analog Electronics › What is a avalanche diode? 0 Vote Up Vote Down chetan shidling asked 4 years ago I need short information. 1 Answers 0 Vote Up Vote Down chetan shidling answered 4 years ago Avalanche occurs in diodes if the voltage over the diode exceeds a specified amount. An avalanche diode is a diode that is created to breakdown and conduct at a specified reverse bias voltage.