Bridge Rectifier 1Phase 1000V 20A
comes with heatsink instaled
 
Fits all our control units.
 
Price listed is for 1 
There are 1 on the PCB
 
For those of you who know how to test and replace solid state circuits.
We will do a video on how to test soon.
 
Most likely cause for replacement:
Voltage spike from outside source such as lighting.
More common would be defective or overworked diods in unit.
Often times the correct heat sink will prevent failure.