bc547 and bc 337
hi
bc 547 and bc337 are both general purpouse npn transistors with same ebc configuration but slightly difference in current 547 can handles up to 500 mamp current with a power dessipation up to 625 mw, while in the case of 337 it can handle up to 800 mamp with a power dessipation of 1.5 watt so it can be used in somewhat more power handling locations than 547.You may download datasheets for 547 and 337 transistors from the links given below
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