Brand new 150A 1000V Stud blocking diode with LARGE Heat Sink for Solar Panels and Wind Generators. 
The heat sink is very large.  Measures 6.5 inches wide, 7 inches long and 2.5 inches high. 
This large heat sink alone weights 1 lb.
The heat sink helps keep the diode cool during operation. 
Mount the diode with the heat sink in vertical position for optimal cooling as the air will travel up through the heat sink fins.
The heat sink is large enough for this 150A diode. 
The blocking diode prevents the current from being drained from the battery bank when there is no solar power or the wind generator is not running. 
It can handle up to 1000V so can even be used for high voltage systems.  Shipping is $8 by priority mail in the US. 
We have them in 25A, 40A, 60A and 85A versions.  Check the other auctions. 
Contact us if you need large quantities for a good discount or amperage from 1 A to 300 A.