TGA100 Rev0106
35
Figure 14. Flyback Diode
FLYBACK DIODE INFORMATION
It is good engineering pratice to include a flyback diode when switching an inductive
load (soleniod coil, relay coil, electric motor winding, etc.). It is recommended that a
flyback diode be installed on inductive devices that share a common power source/
ground with a FRC governor.
Typical circuit showing a flyback diode
installed across an inductive load.
Diagram showing a flyback diode connected
on a typical pump primer motor solenoid.
Diode
Inductive
Load
GND
+V
Primer Motor
Solenoid
+12 VDC
Supply
From Primer
Motor Switch
To Primer
Motor
Ground
+
–
Diode
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