Murata has launched its first non-ceramic based capacitor product, the ECAS
series of polymer aluminium electrolytic capacitors.
The introduction of polymer aluminium electrolytic capacitor technology is
the result of Murata's purchase of Showa Denko K.K.'s (SDK) conductive
polymer capacitor business. Polymer capacitors exhibit strong equivalent
series resistance (ESR) performance compared to traditional electrolytic
capacitors and provide similar characteristics to multi-layer ceramic
capacitors (MLCCs).
The ECAS series allows Murata to greatly expand its high capacitance
offerings, giving customers a full range of capacitor solutions. Markets for
the ECAS series capacitor include computer, digital audio visual and telecom
for overall power management.
The ECAS series has a resin moulded case structure, using multilayer
aluminium foil for anode and solid conductive polymer for negative cathode.
This surface-mount design can be soldered using traditional reflow methods.
The offered capacitance range is from 6.8µF to 470µF with rated voltages
from 2VDC to 16VDC.
It is available in a case size of 7.3mm x 4.3mm with three different
thickness options. The high capacitance value and low ESR lead to low
impedance at high frequency (up to 500kHz), providing excellent noise
suppression, ripple absorption and decoupling abilities on power lines.
In addition, the ECAS series offers capacitance stability at high operating
frequencies and high temperatures. Unlike MLCCs, these capacitors do not
exhibit capacitance drop with applied DC voltage. The operating temperature
range is -40C to 105C and the entire series is RoHS compliant, says the
company.
