Approx Price: Rs 0.1 / Number
Multilayer Ceramic (MLC) Capacitor is a monolithic block of ceramic containing two sets of offset, interleaved planar electrodes that extend to two opposite surfaces of the ceramic dielectric. This simple structure requires a considerable amount of sophistication, both in material and in manufacture, to produce it in the quality quantities needed in today's electronic equipments. Multilayer Ceramic Capacitors are available in a wide range of characteristics. They are classified into two types : Class I are the Temperature Compensating type and Class II are the General Purpose capacitors with non-linear temperature co-efficients.
Class-I capacitors or Temperature Compensating capacitors are usually made from mixtures of Titanates where Barium Titanate is normally not a major part of the mix. They have predictable temperature coefficients and in general, do not have an aging characteristic. Thus they are the most stable capacitor available. Normally the T.C.s of Class - I Temperature Compensating capacitors are NPO (Negative-Positive zero ppm/°C). These capacitors are used in tuned circuits and filters where low loss and stability are necessary.
General Purpose ceramic capacitors are called Class - II capacitors and have become extremely popular because of the high capacitance values available in very small size. Class - II capacitors are “Ferro electric” and vary in capacitance value under the influence of the environmental and electrical operating conditions. Class - II capacitors are affected by temperature, Voltage (both AC and DC), frequency and time. Temperature effects for Class - II ceramic capacitors and are used in coupling and decoupling circuits particularly in controlled temperature environment and in circuits where change of capacitance with temperature is not of major importance.
POLY-AVX manufacturing range includes Ultra-stable COG/1B i.e. NPO temperature characteristic in Class- I, Stable X7R/2C1 and General-Purpose Y5V/2F4 temperature characteristics in Class - II.