The electrical and dielectric behavior fort DC accelerated aging stress of P $r_{6}$ $O_{11}$-based Zno varistors cnsisting of ZnO-P $r_{6}$ $O_{11}$-CoO-C $r_2$ $O_3$-E $r_2$ $O_3$ were investigated with sintering temperature in the range of 1325~1345$^{circ}C$. The varistor ceramics with increasing sintering temperature were more densified. A more densified varistors leaded to high stability for DC accelerated aging stress. Furthermore, the stability for DC accelerated aging stress was increased with the leakage current and dtan $delta$/dV decreasing in order of 1325longrightarrow1335longrightarrow1345longrightarrow134$0^{circ}C$ in sintering temperature. It was found that the stability for DC stress is affected more greatly by the leakage current and dtan $delta$/dV than the densification. It is considered that the stability of varistors for DC stress can be estimated by considering the factors, such as the densification, leakage current, and dtan $delta$/dV. As a result, the varistor sintered at 134$0^{circ}C$ exhibited the highest stability, with %$Delta$ $V_{lmA}$=-1.54%, %$Delta$$alpha$=-2.49%, %$Delta$ $I_{ell}$=+240.68%, 5%$Delta$tan$delta$=+29.96%.96%.96%.%.