Rob Hickman
03-05-2010, 11:03 PM
All aircraft must have protection diodes installed on their Master Relay, Starter Relay and any other large relay. If your aircraft does not have the protection diode on the Master Relay your electrical buss will experience a voltage spike of 500+ Volts every time you turn off the master switch. If your EFIS or Engine Monitor is wired directly to the electrical buss it will be the device that absorbs the voltage spike and will eventually fail. All users must verify that they have the protection diodes installed before powering the EFIS or Engine Monitor from the electrical buss.
Van’s Aircraft sells the protection diodes and they can be found using the following link:
http://vansaircraft.com/cgi-bin/catalog.cgi?ident=1244562062-496-216&browse=electrical&product=diodes (http://vansaircraft.com/cgi-bin/catalog.cgi?ident=1244562062-496-216&browse=electrical&product=diodes)
Surge protection diode for Master Switch
Part Number = ES DIODE MASTER
Price = $5.65
Surge protection diode for Starter/Mag Switch
Part Number = ES DIODE STARTER
Price = $5.65
Van’s Aircraft sells the protection diodes and they can be found using the following link:
http://vansaircraft.com/cgi-bin/catalog.cgi?ident=1244562062-496-216&browse=electrical&product=diodes (http://vansaircraft.com/cgi-bin/catalog.cgi?ident=1244562062-496-216&browse=electrical&product=diodes)
Surge protection diode for Master Switch
Part Number = ES DIODE MASTER
Price = $5.65
Surge protection diode for Starter/Mag Switch
Part Number = ES DIODE STARTER
Price = $5.65