Latest ceramic capacitor range is based on a new dielectric
Miniaturization still drives future electronic equipment designs. This
ongoing evolution inspired Exxelia Technologies to develop a new space-grade
high-voltage ceramic capacitor range based on a new dielectric material
named C48X, combining most of the advantages of NPO and X7R dielectrics.
Compared to X7R material, C48X dielectric allows the same capacitance values
under working voltage with the unrivalled advantage of a very low
dissipation factor (less than 5.10-4). Also, it can also withstand very high
dV/dt, up to 10kV/µs, which makes it the solution of choice for pulse and
fast charge / discharge applications. Capacitors with C48X dielectric
appear to be ideal for power applications where heat dissipation may be
detrimental to performances and reliability.
Capacitors based on the C48X material have been developed from 200V to 5kV
with chip sizes ranging from 1812 to 16080, allowing a maximum capacitance
value of 10µF 200V (10 times more than with an NPO ceramic). The standard
stacked versions are proposed with a maximum capacitance value of 47µF 200V.
Many mounting configurations are possible to be compatible either with
surface-mounting or through-hole mounting. All versions can be suitable for
space use and can be designed in order to avoid any whisker growth risk (10%
min lead in all tin-lead alloys used). The introduction of the C48X range in
the EPPL (European Space Agency Preferred Parts List) for space is in
progress for sizes 0603 to 6560 from 100V to 1kV up to size 1210 and up to
5kV until the size 6560), says the company.
Electronica, Hall B5, Booth 312.