To manufacture the MLCC with X7R for high voltage stability, $BaTiO_3-MgO-MnO_2-Y_2O_3$ with $(Ba_{0.4}Ca_{0.6})SiO_3$ glass frit was formulated. Based on this composition, the addition of $Er_2O_3$ showed that TCC(Temperature Coefficient Capacitance) at $85^{circ}C$ was improved from 5 % to ${sim}0;%$, but the dielectric constant and IR (Insulation Resistance) were decreased. The glass frit improved the dielectric constant and IR, so the appropriate contents of $Er_2O_3$ and glass frit were 0.6 mol% and 1 wt%, respectively. It showed that the dielectric constant and RC constant were 2,550 and 2,000 (${Omega}F$), respectively in the sintering condition at $1250^{circ}C$ in PO2 $10^{-7}$ Mpa. The MLCC with $3.2{ imes}1.6$ (mm) size and $1;{mu}F$ was also suited for X7R with the above composition.