Dielectric characteristics datasheet
●Class I Dielectrics
■Multilayer Ceramic Capacitors are generally divided into classes which are defined by the capacitance temperature characteristics over specified temperature ranges. These are designated by alpha numeric codes. Code definitions are summarised below and are also available in the relevant national and international specifications.
■Capacitors within this class have a dielectric constant range from 10 to 100. They are used in applications which require ultra stable dielectric characteristics with negligible dependence of capacitance and dissipation factor with time, voltage and frequency. They exhibit the following characteristics:-
▲a)Time does not significantly affect capacitance and dissipation factor (Tan δ) – no ageing.
▲b)Capacitance and dissipation factor are not affected by voltage.
▲c)Linear temperature coefficient.
●Class II Dielectrics
■Capacitors of this type have a dielectric constant range of 1000-4000 and also have a non-linear temperature characteristic which exhibits a dielectric constant variation of less than ±15% (2R1) from its room temperature value, over the specified temperature range. Generally used for by-passing (decoupling), coupling, filtering, frequency discrimination, DC blocking and voltage transient suppression with greater volumetric efficiency than Class I units, whilst maintaining stability within defined limits.
■Capacitance and dissipation factor are affected by:-
▲a)Time (Ageing)
▲b)Voltage (AC or DC)
▲c)Frequency
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2019/03/21 |
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299 KB |
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