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			I have a NUBM44-81 block, and I tried to power one of the diodes with 3-3.5 A and ~4 Volts. The diode never activated... why is this? 
 
 
 
	
		
		
	
 
 
					
				
				 
				
			 
			
			
			
	
		
	
			
	
	
	