U2J Commercial-Grade Dielectric SMD ≤250V MLCCs KEMET U2J Dielectric Multilayer Ceramic Capacitors (MLCCs) feature U2J dielectric technology. This technology extends the available capacitance range of Class I MLCCs to achieve values previously available in only Class II dielectric materials, including X7R, X5R, Y5V, and Z5U. KEMET U2J dielectric technology combines the stability expected from C0G Class I MLCCs with the available capacitance expected from X7R Class II MLCCs.