IEEE Power Electronics Magazine - June 2019 - 12

Passive Components

by Ashok Bindra

APEC 2019 Reveals
Latest Advances

A

t the 2019 IEEE Applied Power
Electronics Conference and
Exposition (APEC) in Anaheim, California, passive component
manufacturers demonstrated their
latest developments in capacitors,
inductors, and resistors. Some of the
makers represented there were AVX,
KEMET, Bourns, Inc., Coilcraft, TDK,
and Wurth Electronics.
In the capacitor arena, AVX displayed two new high-reliability tantalum capacitor families for military,
defense, automotive, and industrial
applications. While the TWA M39006
series wet electrolytic tantalum capacitors are qualified to the MIL PRF-39006/33A specification, the
AEC-Q200-qualified F9H series tantalum capacitors are designed to deliver
extreme reliability and high-volumetric efficiency in high-temperature automotive and industrial applications.
With capacitance values spanning
from 470 to 1,800 µF and voltage ratings between 25 and 75 V, the TWA
M39006 series wet electrolytic tantalum capacitors feature a cylindrical,
axial-leaded case with a hermetically
sealed welded tantalum can and header assembly that ruggedly withstands
environmental hazards, including
shock, vibration, and temperatures
extending from −55 to 125 °C. In addition, it includes a unique cathode system that provides a high capacitance
Digital Object Identifier 10.1109/MPEL.2019.2911441
Date of publication: 18 June 2019

12

IEEE POWER ELECTRONICS MAGAZINE

Chris Reynolds, presented the semivoltage/cubic centimeter (CV/cc) and
nar "MLCC and Tantalum Electrostable electrical parameters as well as
lytic Capacitor Interchangeability
M-level reliability (i.e., failure rates of
in High-Capacitance Applications."
1% per 1,000 h).
In his talk, he indicated that ceramic
Likewise, the F9H series offers
capacitors have been used interhigh CV/cc in a high-temperature
changeably with tantalums in many
1206 tantalum capacitor that delivstandard applicaers twice the relitions, with Class II
ability of standard
ceramics being the
automotive-g r a d e
In the capacitor arena,
one version of eleccapa citor s a nd is
AVX displayed two
trostatic technology
compliant with the
new high-reliability
that can achieve the
European Commistantalum capacitor
h ig h capacit a nce
sion's Rest r ict ion
values associated
of Hazardous Subfamilies for military,
w it h elec t roly t ic
s t a n c e s ( RoHS) 2
defense, automotive,
capacitors. "We are
standard. The series
and industrial
currently at a point
is rated for 10-47 μF,
applications.
in the commercial
16 V, with operating
sector where more
temperatures up to
electrolytic designs
150 °C. It employs a
are being reconsidered for applicaconventional manganese dioxide
tions that had switched to Class II
cathode, which is characterized by
ceramic in recent years," stated
low leakage current, and it does not
Reynolds. He noted that, while most
exhibit capacitance loss with applied
applications are amenable to such
voltage (voltage coefficient) or capaciinterchangeability, some parametric
tance loss over time. The latter qualifactors due to differences in technolties are respectively seen in Class II
ogy must be taken into consideration.
multilayer ceramic chip capacitors
He suggested that, with the increas(MLCCs) and aluminum electrolytic
ing demands seen for low-voltage
capacitors, which are ideal for use in
digital applications, tantalum electrothe secondary power lines of automolytic technologies have become a first
tive electronics applications, includchoice for MLCC substitution.
ing engine and transmission control
To contend with consumer holdunits, integrated starter generators,
up, energy harvesting, and pulsed
headlamps, and brakes as well as in
power applications, AVX released
industrial applications.
a new cylindrical, electrochemical,
To address the shortage of MLCCs,
double-layer supercapacitor with
AVX's technical marketing manager,

 June 2019
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