Capacitors

are identical to class II capacitors except the capacitance can vary by more than 15% with changes in temperature over the rated temperature range. Their dielectric constants are usually, but not necessarily, greater than 3500 and are available in Z5U and X5U temperature characteristic codes. These capacitors find application in by-pass, coupling, and other uses where dielectric losses, high insulation resistance,and capacitance stability are not of major concern.