A model of the 2N2222A in a bigger metallic TO-39 case, the 2N2219A had a better electricity dissipation rating (three Watts while connected to a heatsink that continues the case temperature at 25 C, or 0.eight Watts in unfastened air, in comparison with most effective 1.eight Watts and 0.five Watts (respectively) for the 2N2222A.
Article source: https://www.utmel.com/productdetail/centralsemiconductor-2n2222-12373136