Dielectric composition and multilayered electronic component comprising the same

A multilayer electronic component, comprising:

• a body including a dielectric layer and an internal electrode;
• and
• an external electrode disposed on the body and connected to the internal electrode,
• wherein the dielectric layer comprises a dielectric composition,
• wherein the dielectric composition comprises a main ingredient having a perovskite structure represented by ABO3, where A is at least one of barium, strontium, and calcium and B is at least one of titanium, zirconium, and hafnium, and a first accessory ingredient,
• wherein the first accessory ingredient comprises 0.1 mole or more of a rare earth element, 0.02 mole or more of niobium, and 0.25 mole or more of magnesium, and a sum of contents of the rare earth element and Nb is 1.5 mole or less, based on 100 mole of the main ingredient,
• wherein the rare earth element is one or more selected from the group consisting of Ho, Y, Er, Yb, and Dy,
• wherein the dielectric layer has an average thickness of 0.41 μm or less.