[elecena] 2N4449UB/TR - zmiany ceny Tranzystor: NPN; bipolarny; 15V; 400mW 2N4449UB/TR - 115.58 PLN https://elecena.pl/product/30204202/2n4449ub-tr 2026-05-06 2N4449UB/TR - 115.78 PLN https://elecena.pl/product/30204202/2n4449ub-tr 2026-05-18 2N4449UB/TR - 115.58 PLN https://elecena.pl/product/30204202/2n4449ub-tr 2026-05-29 2N4449UB/TR - 119.52 PLN https://elecena.pl/product/30204202/2n4449ub-tr 2026-07-02