Fans su Amazon - Scopri tutte le offerte AdPrezzi convenienti su Fans. Spedizione gratis (vedi condizioni) 3-Wire Cooling Fan Monitor Circuit - ElectroSchematics Cooling fan is an essential part in almost all power electronics systems. Here is a simple circuit for monitoring the instrument cooling fan activity to schematics - What is the symbol for a Fan on a circuit? Is I've been looking around for the schematic symbol to use in a circuit drawing for a FAN. I'm not sure it exists. Do we use a Motor symbol when wanting to show a FAN?