|  | 
			
				| 
			
				|   | 
				 
				
					
						| 1 | 2 | 3 | 4 | 5 | top | 
						base |  
						| g2 | f | f | g1 | k,s | a | B5 |  Tetrode Introduced in 
				1929   
					
						| Vf | Af | Va | Vs | Vg | mAa | mAs | Ra | gm | Pdiss |  
						| 4 | 0,9 | 200 | 100 | -1.3 | 1.5 | 0.6 | 800,000 | 0.9 | 1 |    
					
						| Equivalent | 4610, 5-442, 
						AS494, DN2004, DW6, 
						E442 
						H4080D, H4100D, I4091, 
						IS3, MS4, NC4, 
						RENS1204, S4150, S4V, SCN4, W409 |    |  |  |