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8PCS/LOT=4Pair (4PCS FOR 2SD424 + 4PCS FOR 2SB554 ) TO-3 2SB554 2SD424 NPN/PNP TRANSISTOR Import standard - AliExpress
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Amazon.com: Todiys New 1Pairs for 1Pcs 2SD424 + 1Pcs 2SB554 to-3 Silicon NPN + PNP Power Transistors D424 + B554 : Industrial & Scientific
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