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NPN transistors

Code Structure Case
style		 IC
max.		 VCE
max.		 hFE
min.		 Ptot
max.		 Category
(typical use)		 Possible
substitutes
BC107 NPN TO18 100mA 45V 110 300mW Audio, low power BC182 BC547
BC108 NPN TO18 100mA 20V 110 300mW General purpose, low power BC108C BC183 BC548
BC108C NPN TO18 100mA 20V 420 600mW General purpose, low power  
BC109 NPN TO18 200mA 20V 200 300mW Audio (low noise), low power BC184 BC549
BC182 NPN TO92C 100mA 50V 100 350mW General purpose, low power BC107 BC182L
BC182L NPN TO92A 100mA 50V 100 350mW General purpose, low power BC107 BC182
BC547B NPN TO92C 100mA 45V 200 500mW Audio, low power BC107B
BC548B NPN TO92C 100mA 30V 220 500mW General purpose, low power BC108B
BC549B NPN TO92C 100mA 30V 240 625mW Audio (low noise), low power BC109
2N3053 NPN TO39 700mA 40V 50 500mW General purpose, low power BFY51
BFY51 NPN TO39 1A 30V 40 800mW General purpose, medium power BC639
BC639 NPN TO92A 1A 80V 40 800mW General purpose, medium power BFY51
TIP29A NPN TO220 1A 60V 40 30W General purpose, high power  
TIP31A NPN TO220 3A 60V 10 40W General purpose, high power TIP31C TIP41A
TIP31C NPN TO220 3A 100V 10 40W General purpose, high power TIP31A TIP41A
TIP41A NPN TO220 6A 60V 15 65W General purpose, high power  
2N3055 NPN TO3 15A 60V 20 117W General purpose, high power  
Please note: the data in this table was compiled from several sources which are not entirely consistent! Most of the discrepancies are minor, but please consult information from your supplier if you require precise data.
PNP transistors
Code Structure Case
style		 IC
max.		 VCE
max.		 hFE
min.		 Ptot
max.		 Category
(typical use)		 Possible
substitutes
BC177 PNP TO18 100mA 45V 125 300mW Audio, low power BC477
BC178 PNP TO18 200mA 25V 120 600mW General purpose, low power BC478
BC179 PNP TO18 200mA 20V 180 600mW Audio (low noise), low power  
BC477 PNP TO18 150mA 80V 125 360mW Audio, low power BC177
BC478 PNP TO18 150mA 40V 125 360mW General purpose, low power BC178
TIP32A PNP TO220 3A 60V 25 40W General purpose, high power TIP32C
TIP32C PNP TO220 3A 100V 10 40W General purpose, high power TIP32A
Please note: the data in this table was compiled from several sources which are not entirely consistent! Most of the discrepancies are minor, but please consult information from your supplier if you require precise data.