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.
Source: https://www.utmel.com/productdetail/centralsemiconductor-2n2222-12373136