he conditions specified in catalog or
alternate product specification (specification, here
after).
( 2 ) Operating temperature and applied ripple current
shall be within the specification.
qThe capacitor shall not be used in an ambient
temperature which exceeds the operating
temperature specified in the specification.
wDo not apply excessive current which exceeds the
allowable ripple current.
( 3 ) Appropriate capacitors which comply with the life
requirement of the products should be selected when
designing the circuit.
( 4 ) Aluminum electrolytic capacitors are polarized. Do
not apply reverse voltage or AC voltage. Please use
bi-polar capacitors for a circuit that can possibly see
reversed polarity.
Note: Even bi-polar capacitors can not be used for
AC voltage application.
( 5 ) Do not use aluminum electrolytic capacitors in a
circuit that requires rapid and very frequent charge /
discharge. In this type of circuit, it is necessary to use
a specially designed capacitor with extended life
characteristics.
( 6 ) Do not apply excess voltage.
qPlease pay attention so that the peak voltage, which
is DC voltage overlapped by ripple current, will not
exceed the rated voltage.
wIn the case where more than 2 aluminum electrolytic
capacitors are used in series, please make sure that
applied voltage will be lower than rated voltage and
the voltage be will applied to each capacitor equally
using a balancing resistor in parallel with the
capacitors.
( 7 ) Aluminum electrolytic capacitors must be electrically
isolated as follows:
q(a) Case and negative terminal (except axial leaded
part such as JIS style symbol 02 type)
(b) Case and positive terminal
(c) Case and circuit pattern
w(a) Auxialiary terminal of can type such as JIS style
symbol 693, 694 or 695 and negative and
positive terminal, including the circuit pattern.
( 8 ) Outer sleeve of the capacitor is not guaranteed as an
electrical insulator. Do not use a standard sleeve on
a capacitor in applications that require the electrical
insulation. When the application requires special
insulation, please contact our sales office for details.
( 9 ) Capacitors shall not be used under the following
conditions:
q(a) Capacitors shall not be exposed to water
(including condensation), brine or oil.
(b) Ambient conditions that include toxic gases such
as hydrogen sulfide, sulfurous acid, nitrous acid,
chlorine, ammonium, etc..
(c) Ambient conditions that expose the capacitor to
ozone, ultraviolet ray and radiation.
wSevere vibration and physical shock conditions that
exceed the specification.
(10) When designing a circuit board, please pay attention
to the following:
qHave the hole spacing on the P.C. board match the
lead spacing of the capacitor.
wThere should not be any circuit pattern or circuit wire
above the capacitor pressure relief vent.
eUnless otherwise specified, following clearance
should be made above the pressure relief vent.
Case Diameter
Clearance Required 6.
3~16
2mm or more 18~35
3mm or more 40 or more
5mm or more
rIn case the vent side is placed toward P.C.
board(such as end seal vented parts), make a
corresponding hole on the P.C. board to release the
gas when vent is operated. The hole should be
made to match the capacitor vent position.
tDo not install screw terminal capacitor with end seal
side down. When you install a screw terminal
capacitor in a horizontal position, the positive
terminal must be in the upper position.
(11) The main chemical solution of the electrolyte and the
separator paper used in the capacitors are
combustible. The electrolyte is conductive. When it
comes in contact with the P.C. board, there is a
possibility of pattern corrosion or short circuit
between the circuit pattern which could result in
smoking or catching fire.
Do not locate any circuit pattern beneath the
capacitor end seal.
(12) Do not design a circuit board so that heat generating
components are placed near an aluminum electrolytic
capacitor or reverse side of P.C. board (under the
capacitor).
(13) Please refer to the pad size layout recommendations
in specification when designing in surface mount
capacitors. NICHICON CORPORATION
Application Guidelines for Aluminum Electolytic Capacitors
TECHNICAL NOTES CAT.8101C
(14) Electrical characteristics may vary depending on
changes in temperature and frequency. Please
consider this variation when you design circuits.
(15) When you mount capacitors on the double-sided P.C.
boards, do not place capacitors on circuit patterns or
over on unused holes.
(16) The torque for terminal screw or brackets screws shall
be within the specified value in the specification.
(17) When you install more than 2 capacitors in parallel,
consider the balance of current flowing through the
capacitors.
(18) If more than 2 aluminum electrolytic capacitors are
used in series, make sure the applied voltage will be
lower than the rated voltage and that voltage will be
applied to each capacitor equally using a balancing
resistor in parallel with each capacitor.
2-1-2. Mounting
( 1 ) Once a capacitor has been assembled in the set and
power applied, do not attempt to re-use the capacitor
in other circuits or application.
( 2 ) Electric potential between positive and negative
terminal may exist as a result of returned
electromotive force, so please discharge the
capacitor using a 1k resistor.
( 3 ) Leakage current of the parts that have been stored
for more than 2 years may increase. When leakage
current has increased, please perform a voltage
treatment using 1k resistor.
( 4 ) Please confirm ratings before installing capacitors on
the P.C. board.
( 5 ) Please confirm polarity before in stalling capacitors
on the P.C. board.
( 6 ) Do not drop capacitors on the floor, nor use a
capacitor that was dropped.
( 7 ) Do not damage the capacitor while installing.
( 8 ) Please confirm that the lead spacing of the capacitor
matches the hole spacing of the P.C. board prior to
installation.
( 9 ) Snap-in can type capacitor such as JIS style symbol
692, 693, 694 and 695 type should be installed tightly
to the P.C. board (allow no gap between the P.C.
board an bottom of the capacitor).
(10) Please pay attention that the clinch force is not too
strong when capacitors are placed and fixed by an
automatic insertion machine.
(11) Please pay attention to that the mechanical shock to
the capacitor by suction nozzle of the automatic
insertion machine or automatic mounter, or by
product checker,or by centering mechanism.
(12) Hand soldering.
qSoldering condition shall be confirmed to be within
the specification.
Bit temperature: 350 10
o
C
Application time of soldering iron: 3
0
1
second
w If it is necessary that the leads must be formed due
to a mismatch of the lead space to hole space on
the board, bend the lead prior to soldering without
applying too much stress to the capacitor.
e If you need to remove parts which were soldered,
please melt the solder enough so that stress is not
applied to lead.
r Please pay attention so that solder iron does not
touch any portion of capacitor body.
(13) Flow soldering (Wave solder)
q Aluminum capacitor body must not be submerged
into the solder bath. Aluminum capacitors must be
mounted on the "top side" of the P.C. board and only
allow the bottom side of the P.C. board to come in
contact with the solder.
w Soldering condition must be confirmed to be within
the specification.
Solder temperature: 260 5
o
C, Immersing lead
time:10
1 second, Thickness of P.C. board :
1.6mm
e Please avoid having flux adhere to any portion
except the terminal.
r Please avoid contact between other components
and the aluminum capacitor.
(14) Reflow soldering (SMD only)
q Soldering condition must be confirmed to be within
the specification.
Pre-heationg : Less than 150
o
C, 90 seconds max.
Max. temperature at capacitor top during reflow :
230
o
C
The duration for over 200
o
C temperature at
capacitor top: 20 seconds max.
The duration from the pre-heat temperature to peak
temperature of reflow varies due to changes of the
peak temperature.
w When an infrared heater is used, please pay
attention to the extent of heating since the
absorption rate of infrared, will vary due to
difference in the color of the capacitor body,
material of the sleeve and capacitor size.
e The number of reflow time for SMT aluminum
electrolytic capacitors shall be one time. If this
type of capacitor has to be inevitably subjected to
the reflow twice, enough cooling time between the
first and second reflow (at least more than 30
minutes) shall be taken to avoid consecutive reflow.
Please contact our sales office if you have
questions. NICHICON CORPORATION
Application Guidelines for Aluminum Electolytic Capacitors
TECHNICAL NOTES CAT.8101C
(15) Do not tilt lay down or twist the capacitor body after
the capacitor are soldered to the P.C. board.
(16) Do not carry the P.C. board by grasping the
soldered capacitor.
(17) Please do not allow anything to touch the capacitor
after soldering. If P.C. board are stored in a stack,
please make sure P.C. board or the other
components do not touch the capacitor.
The capacitors shall not be effected by any radiated
heat from the soldered P.C. board or other
components after soldering.
(18) Cleaning Agent, Fixing material, Coating material.
Please refer to the section 2-10-3 for Cleaning
agent, fixing material and coating material.
2-1-3. In the equipment
( 1 ) Do not directly touch terminal by hand.
( 2 ) Do not short between terminals with conductor, nor
spill conductible liquid such as alkaline or acidic
solution on or near the capacitor.
( 3 ) Please make sure that the ambient conditions where
the set is in