Kemet A767KN336M1VLAE031 Surface mount conductive polymer aluminum solid electrolytic capacitor Datasheet

Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Overview
Applications
KEMET’s A767 Series of Surface Mount Conductive Polymer
Aluminum Solid Electrolytic Capacitors offer longer life and
greater stability across a wide range of temperatures. The
A767 Series highly conductive solid polymer electrolyte
eliminates the risk of explosion from drying out and due
to its low ESR properties is able to withstand higher ripple
currents during normal operation. The A767 Series are
ideally suited for industrial and commercial applications.
Typical applications include industrial power supplies,
switch power supplies and industrial control systems.
Benefits
•
•
•
•
•
•
Surface mount form factor
Ultra low impedance
High ripple current
High voltage
105°C/2,000 hours
RoHS compliant
Click image above for interactive 3D content
Open PDF in Adobe Reader for full functionality
Part Number System
A
767
EB
226
M
1H
LA
E050
Capacitor
Class
Series
Size Code
Capacitance
Code (pF)
Tolerance
Rated Voltage
(VDC)
Packaging
ESR
Suface Mount
Conductive
Polymer Solid
Capacitor
105°C
2,000 Hour
High Voltage
See Dimension
Table
A = Aluminum
First two digits
represent
significant
figures for
capacitance
values. Last
digit specifies
the number
of zeros to be
added.
M = ±20%
35 = 1V
50 = 1H
LA = Tape &
Reel
Last 3 digits
represent
significant
figures for ESR
values.
(mΩ)
One world. One KEMET
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016
1
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Ordering Options Table
Packaging Type
Packaging Code
Standard Packaging Options
T&R
LA
Contact KEMET for other Lead and Packaging options
Dimensions – Millimeters
D
H
W
R
L
C
P
Size
Code
EB
KN
MU
D
L
W
H
C
R
Nominal Tolerance Nominal Tolerance Nominal Tolerance Nominal Tolerance Nominal Tolerance Nominal
6.3
8
10
±0.5
±0.5
±0.5
5.7
9.7
12.6
±0.3
±0.3
±0.3
6.6
8.3
10.3
±0.2
±0.2
±0.2
6.6
8.3
10.3
±0.2
±0.2
±0.2
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
7.3
9.0
11.0
±0.2
±0.2
±0.2
0.5 – 0.9
0.8 – 1.1
0.8 – 1.1
P
Nominal
2.1
3.2
4.6
A4071_A767 • 12/13/2016
2
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Environmental Compliance
As an environmentally conscious company, KEMET is working continuously with improvements concerning the environmental
effects of both our capacitors and their production. In Europe (RoHS Directive) and in some other geographical areas like
China, legislation has been put in place to prevent the use of some hazardous materials, such as lead (Pb), in electronic
equipment. All products in this catalog are produced to help our customers' obligations to guarantee their products and fulfill
these legislative requirements. The only material of concern in our products has been lead (Pb), which has been removed
from all designs to fulfill the requirement of containing less than 0.1% of lead in any homogeneous material. KEMET will
closely follow any changes in legislation worldwide and makes any necessary changes in its products, whenever needed.
Some customer segments such as medical, military and automotive electronics may still require the use of Lead in electrode
coatings. To clarify the situation and distinguish products from each other, a special symbol is used on the packaging labels
for RoHS compatible capacitors.
Because of customer requirements, there may appear additional markings such as LF = Lead-free, or LFW = Lead-free wires on
the label.
Performance Characteristics
Item
Performance Characteristics
Capacitance Range
18 – 220 µF
Rated Voltage
35 – 50 VDC
Operating Temperature
−55°C to +105°C
Capacitance Tolerance
±20% at 120 Hz/20°C
Life Test
Leakage Current
2,000 hours (see conditions in Test Method & Performance)
≤ Specified Value
C = Rated capacitance (µF), V = Rated voltage (VDC), Voltage applied for 2 minutes at 20°C.
Impedance Z Characteristics at 100 Hz
Z (−25°C)/Z (20°C)
≤ 1.25
Z (−55°C)/Z (20°C)
≤ 1.25
Compensation Factor of Ripple Current (RC) vs. Frequency
Frequency
Coefficient
120 Hz ≤ f < 1 kHz
1 kHz ≤ f < 10 kHz
0.05
0.30
10 kHz ≤ f < 100 kHz 100 kHz ≤ f < 500 kHz
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
0.70
1.00
A4071_A767 • 12/13/2016
3
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Test Method & Performance
Conditions
Load Life Test
Shelf Life Test
Temperature
105°C
105°C
Test Duration
2,000 hours
168 hours
Ripple Current
No ripple current applied
No ripple current applied
The sum of DC voltage and the peak AC voltage must not exceed the
rated voltage of the capacitor
No voltage applied
Voltage
Performance
The following specifications will be satisfied when the capacitor is restored to 20°C.
Capacitance Change
Within ±20% of the initial value
Dissipation Factor
Does not exceed 150% of the specified value
ESR
Does not exceed 150% of the specified value
Leakage Current
Does not exceed specified value
The following specifications will be satisfied when the capacitor is restored to 20°C
after application of rated voltage for 1,000 hours at 60°C, 90%~95% RH.
Damp Heat
Capacitance Change
Within ±20% of the initial value
Dissipation Factor
Does not exceed 150% of the specified value
ESR
Does not exceed 150% of the specified value
Leakage Current
Surge Voltage
(Rated Voltage x 1.15(V))
Capacitance Change
Does not exceed specified value
The following specifications will be satisfied when the capacitor is subjected to 1,000
cycles each consisting of charge with the surge voltages specified at 105°C for 30
seconds through a protective resistor (Rc = 1 kΩ) and discharge for 5 minutes 30
seconds.
Within ±20% of the initial value
Dissipation Factor
Does not exceed 150% of the specified value
ESR
Does not exceed 150% of the specified value
Leakage Current
Resistance to Soldering
Heat
Capacitance Change
Does not exceed specified value
Measurement for solder temperature profile at capacitor top and terminal.
Within ±10% of the initial value
Dissipation Factor
Does not exceed 130% of the specified value
ESR
Does not exceed 130% of the specified value
Leakage Current
Does not exceed specified value
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016
4
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Shelf Life and Re-Ageing
• KEMET's conductive polymer aluminum solid electrolytic capacitors should not be stored in high temperatures or where
there is a high level of humidity.
• The suitable storage condition for KEMET's conductive polymer aluminum solid electrolytic capacitors is +5 to +35ºC and
less than 75% in relative humidity.
• KEMET's conductive polymer aluminum solid electrolytic capacitors should not be stored in damp conditions such as
water, saltwater spray or oil spray.
• KEMET's conductive polymer aluminum solid electrolytic capacitors should not be stored in an environment full of
hazardous gas (hydrogen sulphide, sulphurous acid gas, nitrous acid, chlorine gas, ammonium, etc.)
• KEMET's conductive polymer aluminum solid electrolytic capacitors should not be stored under exposure to ozone,
ultraviolet rays or radiation.
The capacitance, ESR and impedance of a capacitor will not change significantly after extended storage periods, however the
leakage current will very slowly increase.
If a capacitor is stored for a long period of time, the leakage current must be verified. If the leakage current is superior to the
value listed in
this catalog, the capacitors must be reformed.
Re-age (Reforming) Procedure
Apply the rated DC voltage to the capacitor at 105°C for a period of 120 minutes through a 1 kΩ series resistor.
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016
5
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Table 1 – Ratings & Part Number Reference
Rated
Case Size
Capacitance
D x L (mm)
120 Hz 20°C (µF)
ESR
100 kHz
20°C (mΩ)
RC
100 kHz
105°C
(mA)
LC
20°C
2 Minutes
(µA)
KEMET
Part Number
VDC
VDC Surge
Voltage
35
35
35
35
35
35
35
35
35
50
50
50
50
50
50
50
40.2
40.2
40.2
40.2
40.2
40.2
40.2
40.2
40.2
57.5
57.5
57.5
57.5
57.5
57.5
57.5
22
33
47
56
82
100
150
180
220
18
22
33
47
56
82
100
6.3 x 5.7
8 x 9.7
8 x 9.7
8 x 9.7
8 x 9.7
10 x 12.6
10 x 12.6
10 x 12.6
10 x 12.6
8 x 9.7
8 x 9.7
8 x 9.7
8 x 9.7
8 x 9.7
10 x 12.6
10 x 12.6
50
31
31
31
31
29
28
28
28
50
50
45
29
29
27
27
1300
1900
1900
1900
3600
2500
2600
2600
2600
1300
1500
1800
3300
3300
3300
1700
300
300
329
392
574
700
1050
1260
1540
300
300
330
470
560
820
1000
A767EB226M1VLAE050
A767KN336M1VLAE031
A767KN476M1VLAE031
A767KN566M1VLAE031
A767KN826M1VLAE031
A767MU107M1VLAE029
A767MU157M1VLAE028
A767MU187M1VLAE028
A767MU227M1VLAE028
A767KN186M1HLAE050
A767KN226M1HLAE050
A767KN336M1HLAE045
A767KN476M1HLAE029
A767KN566M1HLAE029
A767MU826M1HLAE027
A767MU107M1HLAE027
VDC
VDC Surge
Rated Capacitance
Case Size
ESR
RC
LC
Part Number
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016
6
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Installing
Conductive polymer aluminum solid electrolytic capacitors are prone to a change in leakage current due to thermal
stress during soldering. The leakage current may increase after soldering or reflow soldering. Therefore, do not use these
capacitors in circuits sensitive to leakage current.
•
•
•
•
Do not use in a high resistance, high voltage circuit.
Do not use in a coupling circuit.
Do not use in a time constant circuit.
Do not use in a circuits that are significantly affected by leakage current.
A general principle is that lower temperature operation results in a longer, useful life of the capacitor. For this reason, it
should be ensured that electrolytic capacitors are placed away from heat-emitting components. Adequate space should be
allowed between components for cooling air to circulate, especially when high ripple current loads are applied. In any case,
the maximum rated temperature must not be exceeded.
• Do not deform the case of capacitors or use capacitors with a deformed case.
• Verify that the connections of the capacitors are able to insert on the board without excessive mechanical force.
Excessive force during insertion, as well as after soldering may cause terminal damage and affect the electrical
performance.
• Ensure electrical insulation between the capacitor case, negative terminal, positive terminal and PCB.
• If the capacitors require mounting through additional means, the recommended mounting accessories shall be used.
• Verify the correct polarization of the capacitor on the board.
KEMET recommends, to ensure that the voltage across each capacitor does not exceed its rated voltage.
Temperature Stability Characteristics
Stable characteristics in a very low temperature range allows for less circuits in the design.
Due to a solid polymer electrolyte, conductive polymer electrolytic capacitors feature higher conductivity. This results
in a lower ESR which, coupled with high capacitance allows an aluminum polymer capacitor to replace several standard
electrolytic capacitors, reducing the number of components and maximizing board space.
The ESR of polymer capacitors is nearly constant within its operating temperature range, while the ESR of a standard
electrolytic capacitor noticeably changes with temperature.
Temperature Stability Characteristics
1,000
Aluminum Electrolytic
Conductive Polymer Electrolytic
ESR (Ω)
100
10
1
0.1
0.01
−55
−20
0
20
Temperature (ºC)
70
105
125
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016
7
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Expected Life Calculation Chart
Expected life depends on operating temperature according to the following formula:
L = Lo x 10(To-T)/20
Where:
L: Expected life
Lo: Life at maximum permissible operating temperature with rated operating voltage applied (hours)
T: Actual operating temperature
To: Maximum permissible operating temperature
Actual Operating Temperature (ºC)
Expected Life Calculation Chart
105ºC
85ºC
65ºC
2,000
20,000
200,000
Expected Life (hours)
The effect of derating temperature can be seen in this graph.
In this example, the life expectancy of a 2,000 hour Polymer capacitor is significantly greater than that of a 2,000 hour
standard electrolytic capacitor.
Capacitor Life (H)
50,000
100,000
150,000
200,000
Temperature (ºC)
105
100
95
90
Aluminum Electrolytic
Conductive Polymer Electrolytic
85
80
75
70
65
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016
8
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Ultra Low Impedance at High Frequency
Due to a solid polymer electrolyte, the curve of a conductive polymer electrolytic capacitor, (Z and ESR) is significantly lower
than that of a standard electrolytic capacitor.
Ultra Low Impedance at High Frequency (Low ESR)
100
Impedance (Ω)
Aluminum Electrolytic
Conductive Polymer Electrolytic
10
1
0.1
0.01
0
10K
100K
Frequency (Hz)
1M
10M
High Resistance to Ripple Current
As a result of a lower ESR, conductive polymer electrolytic capacitors are able to withstand higher ripple currents during
normal operation.
Allowable Ripple Current (100 kHz 105ºC)
Ripple Current (Arms)
4
3.5
3
Aluminum Electrolytic
Conductive Polymer Electrolytic
2.5
2
1.5
1
0.5
0
33 µF/16 V
47 µF/16 V
100 µF/16 V
220 µF/16 V
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016
9
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Construction
Aluminum Can
Lead
Terminal Tabs
Detailed Cross Section
Rubber Seal
Terminal Tab
Rubber Seal
Margin
Aluminum Can
Paper Spacer with Solid
Polymer Electrolyte
(First Layer)
Paper Spacer with Solid
Polymer Electrolyte
(Third Layer)
Anode Aluminum Foil,
Cathode Aluminum
Etched, Covered with
Foil,
Etched (Fourth
Aluminum Oxide
Layer)
(Second Layer)
Lead (+)
Lead (−)
Standard Marking for Surface Mount Types
Trademark
Negative Polarity
Red Line
Series
Capacitance (µF)
Rated Voltage (VDC)
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016 10
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Re-Flow Soldering
The soldering conditions should be within the specified conditions below:
• Do not dip the capacitors body into the melted solder.
• Flux should only be applied to the capacitors terminals.
• Vapour heat transfer systems are not recommended. The system should be thermal, such as infra-red radiation or hot
blast.
• Observe the soldering conditions as shown below.
• Do not exceed these limits and avoid repeated reflowing.
Time
period
Temperature (ºC)
Time (seconds)
T1
T2
Φ<8
≤ 200
≤ 230
≤ 260
60 – 180
≤ 50
≤ 40
Maximum Temperature: ≤ 275 Times ≤ 2
T3
Φ≥8
≤ 240
≤ 40
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016 11
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Lead Taping & Packaging
Reel
Case Size (mm)
A
B
5x6
5x7
6.3 x 5.7
6.3 x 7
6.3 x 8
6.3 x 9.7
8 x 7.5
8 x 9.7
10 x 12.6
±0.5
14
14
18
18
18
18
26
26
26
±0.2
14
14
22
22
22
22
30
30
30
Size Code
Diameter (mm)
Length (mm)
Reel Quantity
Box Quantity
EB
KN
MU
6.3
8
10
5.7
9.7
12.6
1,000
500
400
10,000
3,000
2,400
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016 12
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Taping for Automatic Insertion Machines
Dimensions (mm)
W
P
F
B1
B0
T2
Tolerance
±0.3
±0.1
±0.1
±0.2
±0.2
±0.2
5x6
5x7
6.3 x 5.7
6.3 x 7
6.3 x 8
6.3 x 9.7
8 x 7.5
8 x 9.7
10 x 12.6
16.0
16.0
16.0
16.0
16.0
16.0
24.0
24.0
24.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
16.0
16.0
7.5
7.5
7.5
7.5
7.5
7.5
11.5
11.5
11.5
5.6
5.6
7.0
7.0
7.0
7.0
8.6
8.6
10.7
5.6
5.6
7.0
7.0
7.0
7.0
8.6
8.6
10.7
7.1
7.1
7.6
7.6
7.6
9.6
8.4
10.3
13.1
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016 13
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Construction Data
The manufacturing process begins with the anode foil being
electrochemically etched to increase the surface area and
then ‘formed’ to produce the aluminum oxide layer. Both the
anode and cathode foils are then interleaved with absorbent
paper and wound into a cylinder. During the winding process,
aluminum tabs are attached to each foil to provide the
electrical contact.
The deck, complete with terminals, is attached to the tabs
and then folded down to rest on top of the winding. The
complete winding is impregnated with a conductive polymer
electrolyte before being housed in a suitable container, usually
an aluminum can, and sealed. Throughout the process, all
materials inside the housing must be maintained at the
highest purity and be compatible with the electrolyte.
Each capacitor is aged and tested before being packed.
The purpose of aging is to repair any damage in the oxide
layer and thus reduce the leakage current to a very low level.
Aging is normally carried out at the rated temperature of the
capacitor and is accomplished by applying voltage to the
device while carefully controlling the supply current. The
process may take several hours to complete. Damage to the
oxide layer can occur due to variety of reasons:
• Slitting of the anode foil after forming
• Attaching the tabs to the anode foil
• Minor mechanical damage caused during winding
Slitting
Stitching
Winding
Welding
Forming
Carbonization
Cleaning
Desiccation
Saturating
Reforming
Assembling
Cleaning
Roasting
Aging
Floor
Terminal
Lead line
Rubber
Case
Anode foil
Inspection before
marking
V-chip forming and
marking
Cathode foil
Separator
Inspection after
marking
Stocking
Packing
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016 14
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Product Safety
THESE NOTES SHOULD BE READ IN CONJUNCTION WITH THE PRODUCT DATA SHEET. FAILURE TO OBSERVE THE RATINGS
AND THE INFORMATION ON THIS SHEET MAY RESULT IN A SAFETY HAZARD.
Warning
When potential lethal voltages e.g. 30 VAC (RMS) or 60 VDC are applied to the terminals of this product, the use of a
hazard warning label is recommended.
1. Electrolyte
Conductive polymer aluminum solid electrolytic capacitors contain polymers (electrolytes) which can be hazardous.
1.1 Safety Precautions
In the event of gas venting, avoid contact and inhalation. Wash the affected area with hot water. Use rubber gloves to avoid
skin contact. Any contact with the eyes should be liberally irrigated with water and medical advice sought.
2. Intrinsic Properties
2.1 Operating
DC capacitors are polar devices and will operate safely only if correctly connected. Reversing the connections will result
in high leakage currents which could subsequently cause short circuit failure and possibly explosion and fire. Correctly
polarized operation may result in the above failure modes if:
• The surge voltage is exceeded
• The ambient temperature is too high
• Excessive ripple currents are applied
2.2 Non-Operating
Excessive torque or soldering heat may affect the performance of the capacitor or damage the sealing. Electric shock may
result if capacitors are not discharged.
3. Disposal
Aluminum electrolytic capacitors are consignable waste under the Special Waste Regulations 1996 (Statutory Instrument
1996 No 972), which complies with the EC Hazardous Waste Directive – Directive 91/689/EEC. The electrolyte should
therefore be treated as a hazardous waste and advice should be sought from the local office of the Environmental Agency
regarding its disposal.
Due to the construction of an aluminum electrolytic capacitors, high temperature incineration may cause the component to
explode due to build-up of internal pressure. In addition, incineration may also cause the emission of noxious fumes.
KEMET strongly recommends that if there are any doubts regarding the disposal of conductive polymer aluminum solid
electrolytic capacitors, that advice be sought from the local regulating authority.
In addition, KEMET would like to request that users of aluminum electrolytic capacitors respect the needs of the environment
and, wherever possible, recover as much of the materials as possible, i.e. aluminum.
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016 15
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
Product Safety cont'd
4. Unsafe Use
Most failures are of a passive nature and do not represent a safety hazard. A hazard may, however, arise if this failure causes
a dangerous malfunction of the equipment in which the capacitor is employed. Circuits should be designed to fail safe under
the normal modes of failure.
The usual failure mode is an increase in leakage current or short circuit. Other possible modes are decrease of capacitance,
increase in dissipation factor (and impedance) or an open circuit. Capacitors should be used in a well-ventilated enclosure or
cabinet.
5. Mounting
Care should be taken when mounting by clamp, that any safety vent in the can is not covered.
6. Fumigation
In many countries throughout the world it is now common practice to fumigate shipments of products in order to control
insect infestation, particularly when wooden packaging is used. Currently, methyl bromide is widely used as a fumigant,
which can penetrate cardboard packing and polymer bags and, therefore, come into direct contact with equipment or
components contained within.
If aluminum electrolytic capacitors become exposed to methyl bromide then corrosion may occur, depending upon the
concentration and exposure time to the chemical.
This failure mode can affect all types of KEMET aluminum electrolytic capacitors. Methyl bromide can penetrate the seals of
aluminum electrolytic capacitors and cause internal corrosion of the anode connection, resulting in the component becoming
open circuit. The rate of corrosion will depend upon the level of exposure to methyl bromide as well as the subsequent
operating conditions, such as voltage and temperature. It may take months or, in some cases, several years before the
component becomes open circuit.
7. Dielectric Absorption
A phenomenon known as dielectric absorption can cause aluminum electrolytic capacitors to recharge themselves. The
phenomenon is well known but impossible to predict with any great accuracy, so potentially any electrolytic product could be
affected. Thus, a capacitor that has been charged and then completely discharged will appear to recharge itself if left open
circuit; this will manifest itself as a small voltage across the terminals of the capacitor. Generally, the voltages seen are less
than 20 VDC. However, higher voltages have on occasion been reported.
In order to avoid any problems caused by this voltage, KEMET recommends that capacitors be discharged before connecting
to the terminals.
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016 16
Surface Mount Conductive Polymer Aluminum Solid Electrolytic Capacitors
A767 Series, 105°C
KEMET Electronic Corporation Sales Offices
For a complete list of our global sales offices, please visit www.kemet.com/sales.
Disclaimer
All product specifications, statements, information and data (collectively, the “Information”) in this datasheet are subject to change. The customer is responsible for
checking and verifying the extent to which the Information contained in this publication is applicable to an order at the time the order is placed.
All Information given herein is believed to be accurate and reliable, but it is presented without guarantee, warranty, or responsibility of any kind, expressed or implied.
Statements of suitability for certain applications are based on KEMET Electronics Corporation’s (“KEMET”) knowledge of typical operating conditions for such
applications, but are not intended to constitute – and KEMET specifically disclaims – any warranty concerning suitability for a specific customer application or use.
The Information is intended for use only by customers who have the requisite experience and capability to determine the correct products for their application. Any
technical advice inferred from this Information or otherwise provided by KEMET with reference to the use of KEMET’s products is given gratis, and KEMET assumes no
obligation or liability for the advice given or results obtained.
Although KEMET designs and manufactures its products to the most stringent quality and safety standards, given the current state of the art, isolated component
failures may still occur. Accordingly, customer applications which require a high degree of reliability or safety should employ suitable designs or other safeguards
(such as installation of protective circuitry or redundancies) in order to ensure that the failure of an electrical component does not result in a risk of personal injury or
property damage.
Although all product–related warnings, cautions and notes must be observed, the customer should not assume that all safety measures are indicted or that other
measures may not be required.
KEMET is a registered trademark of KEMET Electronics Corporation.
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
A4071_A767 • 12/13/2016 17