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				Philips B443 five pin version 
				 |  |  
					
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				Philips B443 
				with side contact |  | 
				 
				Output pentode 
				Introduced in 1927 
				
					
						| 1 | 2 | 3 | 4 | 5/sc | base |  
						| f | a | f | g1 | g2 | B4/B5 |  
				  
					
						| Vf | Af | Va | Vs | Vg | mAa | mAs | Ra | gm | Pout | Pdiss |  
						| 4 | 0.15 | 250 | 150 | -19 | 12 | 2.4 | 45,000 | 1.3 | 1.35 | 3 |    
							
								| Equivalent | 2-443, 410PT, 
								D100, D100N, 
								DX3, L43, L415D, L506, M1004, PM24, 
								PP415,
								R79,  
								RES174, 
								RO4243, 
								TB43, W443 |  |