A herematically sealed PNP fused junction transistor for medium power application

Transistors have been disappointing to many application engineers because of lack of stability with temperature and operating point variations, and degradation with time. Early units have also had wide ranges of characteristic variations, requiring "tailoring" of circuits to individual transistors. The 2N43, 2N44, and 2N45 transistors have been designed to eliminate the vagaries introduced by environment changes, and to delineate inherent variations in such form that design allowance may be made for them.