Multilayer capacitor comprising capacitor body including active portion and margin portion

A multilayer capacitor comprising:

• a capacitor body including first and second surfaces opposing each other in a first direction, third and fourth surfaces opposing each other in a second direction, perpendicular to the first direction, and fifth and sixth surfaces opposing each other in a third direction, perpendicular to the first direction, and including a plurality of dielectric layers and first and second internal electrodes alternately disposed with the dielectric layers interposed therebetween;
• and
• first and second external electrodes disposed on the third and fourth surfaces of the capacitor body and connected to the first and second internal electrodes, respectively,
• wherein the capacitor body includes an active region in which the first and second internal electrodes overlap in the first direction, and
• at least a portion of a margin portion between the active region and the fifth and sixth surfaces of the capacitor body and excluding the active region in the capacitor body includes barium (Ba) and titanium (Ti) in amounts having a molar ratio of Ba to Ti of less than 1 (Ba/Ti<1) and includes crystal grains having a twin boundary structure and a grain size of 250 nm to 1000 nm.