Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Overview
Applications
KEMET’s A771 Surface Mount Solid Polymer Aluminum
Capacitors offer 4,000h lifetime and greater stability across
a wide range of temperatures. This highly conductive solid
polymer electrolyte eliminates the risk of drying out and, due
to its ultra low ESR properties, is able to withstand higher
ripple currents during normal operation, up to +35% when
compared to A768 series. The A771 is AEC-Q200 qualified,
ideally suited for automotive and industrial applications.
Anti-Vibration version is available for 10 mm diameter. If
CV/Size is not available please contact your local Sales
Representative for more information.
Typical applications include long life LED drivers,
professional power amplifiers, industrial power supplies,
DC/DC converters, voltage regulators, and decoupling.
This series is used for automotive powertrain.
Benefits
• High temperature and long lifetime: 125°C/4,000 hours
• High ripple current up to 3.6 ARMS
• Ultra low impedance
• High vibration resistance up to 30 g
• Surface mount form factor
• RoHS compliant
• Halogen-free
Standard
Anti-Vibration
Built Into Tomorrow
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
1
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Part Number System
A
771
MS
107
M
1J
LA
S
018
Capacitor
Class
Series
Size Code
Capacitance
Code (pF)
Tolerance
Rated Voltage
(VDC)
Packaging
Electrical Parameters
ESR
Surface
Mount Solid
Polymer
Aluminum
Capacitors
125°C
4,000 hours
Long Life,
High Ripple,
Low Leakage
See
Dimension
Table
LA =
Tape & Reel
S = Automotive
AEC-Q200
V = Automotive +
Anti-Vibration
Last 3 digits
represent
significant
figures for
ESR values.
(mΩ)
A=
Aluminum
First two
digits
represent
significant
figures for
capacitance
values. Last
digit specifies
the number
of zeros to be
added.
M=
±20%
16 = 1C
20 = 1D
25 = 1E
35 = 1V
40 = 1G
50 = 1H
63 = 1J
Ordering Options Table
Packaging Type
Packaging Code
Standard Packaging Options
Tape & Reel
LA
Contact KEMET for other Lead and Packaging options
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
2
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Dimensions – Millimeters
Standard
D
H
W
P
R
L
C
0.2 Maximum
Anti-Vibration
K
J
Size
Code
KS
MN
MN
(AntiVibration)
MS
MS
(AntiVibration)
D
L
W
H
C
R
P
J
K
Nominal
Tolerance
Nominal
Tolerance
Nominal
Tolerance
Nominal
Tolerance
Nominal
Tolerance
Range
Nominal
Nominal
Nominal
8
10
±0.5
±0.5
12.2
10.2
±0.3
±0.3
8.3
10.3
±0.2
±0.2
8.3
10.3
±0.2
±0.2
9
11
±0.2
±0.2
0.8 – 1.1
0.8 – 1.1
3.2
4.6
-
-
10
±0.5
10.4
±0.3
10.3
±0.2
10.8
±0.2
11.2
±0.2
0.7 – 1.1
4.6
4.4
3.2
10
±0.5
12.2
±0.5
10.3
±0.2
10.3
±0.2
11
±0.2
0.8 – 1.1
4.6
-
-
10
±0.5
12.4
±0.5
10.3
±0.2
10.8
±0.2
11
±0.2
0.7 – 1.1
4.6
4.4
3.2
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
3
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Environmental Compliance
All Part Numbers in this datasheet are Reach and RoHS compliant, and Halogen-Free.
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 make 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.
Due to 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
47 – 1,000 µF
Rated Voltage
16 – 63 VDC
Operating Temperature
−55°C to +125°C
Capacitance Tolerance
±20% at 120 Hz/20°C
Life Test
Leakage Current
4,000 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.
Compensation Factor of Ripple Current (RC) vs. Frequency
Frequency
120 Hz ≤ f < 1 kHz
1 kHz ≤ f < 10 kHz
Coefficient
0.05
0.30
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
10 kHz ≤ f < 100 kHz 100 kHz ≤ f < 500 kHz
0.70
1.00
A4117_A771 • 8/8/2023
4
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Test Method & Performance
Conditions
Load Life Test
Shelf Life Test
Temperature
125°C
125°C
Test Duration
4,000 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 125°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
Does not exceed specified value
Measurement for solder temperature profile at capacitor top and terminal.
Capacitance Change
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 • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
5
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Test Method & Performance – Anti-Vibration Version
Anti-Vibration Version
Vibration Test Specifications
Capacitance Change
1.5 mm displacement amplitude or 30 g maximum acceleration. Vibration applied
for three 4-hour sessions at 10 – 2,000 Hz (capacitor on PCB).
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
Shelf Life & Re-Ageing
Shelf Life
Solderability is 12 months after manufacturing date.
The capacitance, ESR and impedance of a capacitor will not change significantly after extended storage periods, however the
leakage current will slowly increase.
• This series should not be stored in high temperatures or where there is a high level of humidity.
• The suitable storage condition is +5 to +35°C and less than 75% in relative humidity.
• Do not store in damp conditions such as water, saltwater spray or oil spray.
• Do not store in an environment of hazardous gas (hydrogen sulphide, sulphurous acid gas, nitrous acid, chlorine gas,
ammonium, etc.)
•Do not store under exposure to ozone, ultraviolet rays or radiation.
If a capacitor has been stored for more than 12 months under these conditions and it shows increased leakage current,
then a treatment by voltage application is recommended.
Note: The JEDEC-J-STD-020 standard does not apply.
Floor Life
The Capacitor should be soldered within 4 weeks after removal from sealed bag. Reseal the unused capacitors
into plastic bags. All parts manufactured from week 1 of year 2022 are packed in sealed plastic bags.
Re-age Procedure
Apply the rated DC voltage to the capacitor at 125°C for a period of 120 minutes through a 1 kΩ series resistor.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
6
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Table 1 – Ratings & Part Number Reference
Rated
Voltage
Surge
Voltage
Rated
Capacitance
ESR
Ripple
Current
Leakage
Current
Case
Size
(VDC)
(VDC)
120 Hz
20°C (µF)
100 kHz
20°C (mΩ)
100 kHz
125°C (mA)
20°C
2 min (µA)
DxL
(mm)
Standard Version
Anti-Vibration
Version
D x L (mm)
Anti-Vibration
16
16
16
16
20
20
20
25
25
25
25
25
35
35
35
35
35
40
40
40
40
50
50
50
50
50
50
63
63
63
63
63
18.40
18.40
18.40
18.40
23.00
23.00
23.00
28.75
28.75
28.75
28.75
28.75
40.25
40.25
40.25
40.25
40.25
46.00
46.00
46.00
46.00
57.50
57.50
57.50
57.50
57.50
57.50
72.45
72.45
72.45
72.45
72.45
470
560
680
1000
390
560
680
330
390
330
470
560
180
220
270
270
330
150
200
220
270
82
100
100
120
120
150
47
56
68
82
100
11
11
13
10
11
13
10
12
12
14
11
11
16
16
14
14
14
16
14
14
14
13
16
20
16
16
16
20
20
18
18
18
3,375
3,375
3,190
3,645
3,240
3,080
3,510
3,139
3,139
2,990
3,375
3,375
2,700
2,700
2,970
2,970
2,970
2,633
2,970
2,970
2,970
2,565
2,903
2,565
2,903
2,903
2,903
2,430
2,430
2,700
2,700
2,700
1,504
1,792
2,176
3,200
1,560
2,240
2,720
1,650
1,950
1,650
2,350
2,800
1,260
1,540
1,890
1,890
2,310
1,200
1,600
1,760
2,160
820
1,000
1,000
1,200
1,200
1,500
592
706
857
1,033
1,260
8 x 12.2
8 x 12.2
10 x 10.2
10 x 12.2
8 x 12.2
10 x 10.2
10 x 12.2
8 x 12.2
8 x 12.2
10 x 10.2
10 x 12.2
10 x 12.2
8 x 12.2
8 x 12.2
10 x 10.2
10 x 12.2
10 x 12.2
8 x 12.2
10 x 10.2
10 x 12.2
10 x 12.2
8 x 12.2
10 x 12.2
8 x 12.2
10 x 10.2
10 x 12.2
10 x 12.2
8 x 12.2
8 x 12.2
10 x 10.2
10 x 12.2
10 x 12.2
A771KS477M1CLAS011
A771KS567M1CLAS011
A771MN687M1CLAS013
A771MS108M1CLAS010
A771KS397M1DLAS011
A771MN567M1DLAS013
A771MS687M1DLAS010
A771KS337M1ELAS012
A771KS397M1ELAS012
A771MN337M1ELAS014
A771MS477M1ELAS011
A771MS567M1ELAS011
A771KS187M1VLAS016
A771KS227M1VLAS016
A771MN277M1VLAS014
A771MS277M1VLAS014
A771MS337M1VLAS014
A771KS157M1GLAS016
A771MN207M1GLAS014
A771MS227M1GLAS014
A771MS277M1GLAS014
A771KS826M1HLAS013
A771MS107M1HLAS016
A771KS107M1HLAS020
A771MN127M1HLAS016
A771MS127M1HLAS016
A771MS157M1HLAS016
A771KS476M1JLAS020
A771KS566M1JLAS020
A771MN686M1JLAS018
A771MS826M1JLAS018
A771MS107M1JLAS018
A771MN687M1CLAV013
A771MS108M1CLAV010
A771MN567M1DLAV013
A771MS687M1DLAV010
A771MN337M1ELAV014
A771MS477M1ELAV011
A771MS567M1ELAV011
A771MN277M1VLAV014
A771MS277M1VLAV014
A771MS337M1VLAV014
A771MN207M1GLAV014
A771MS227M1GLAV014
A771MS277M1GLAV014
A771MS107M1HLAV016
A771MN127M1HLAV016
A771MS127M1HLAV016
A771MS157M1HLAV016
A771MN686M1JLAV018
A771MS826M1JLAV018
A771MS107M1JLAV018
10 x 10.4
10 x 12.4
10 x 10.4
10 x 12.4
10 x 10.4
10 x 12.4
10 x 12.4
10 x 10.4
10 x 12.4
10 x 12.4
10 x 10.4
10 x 12.4
10 x 12.4
10 x 12.4
10 x 10.4
10 x 12.4
10 x 12.4
10 x 10.4
10 x 12.4
10 x 12.4
(VDC)
(VDC)
120 Hz
20°C (µF)
100 kHz
20°C (mΩ)
100 kHz
125°C (mA)
20°C
2 min (µA)
DxL
(mm)
() Represents Part
Number Options
Anti-Vibration
Version
D x L (mm)
Anti-Vibration
Rated
Voltage
Surge
Voltage
Rated Capacitance
ESR
Ripple
Current
Leakage
Current
Case
Size
KEMET Part Number
KEMET Part Number
Case
Size
Case
Size
(1) Electrical Parameters code. See Part Number System for available options.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
7
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Installing
Solid Polymer Aluminum 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, verify the suitability for use in circuits sensitive
to 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.
ESR Temperature and Frequency Dependence
Stable characteristics in a very low temperature range allows for less circuits in the design.
Due to a solid polymer electrolyte, Solid Polymer Aluminum 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.
Temperature Stability Characteristics
Example: ESR at 100 KHz A771 330 µF/35 V and 100 µF/63 V
18
ESR @100kHz (mΩ)
16
14
12
10
8
6
4
-60
-40
-20
0
20
A771 330µF/35V; 10x12.2mm
40
T (°C)
60
80
100
120
140
A771 100µF/63V; 10x12.2mm
© KEMET Electronics Corporation • One East Broward Boulevard
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A4117_A771 • 8/8/2023
8
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
ESR across Frequency Range
Due to a solid polymer electrolyte, the ESR curve of a solid polymer aluminum capacitor, is low and stable in high frequency
range (10kHz to 1MHz).
ESR values across Frequency
ESR at 20ºC (mΩ)
1000
100
10
1
100
1,000
10,000
f (Hz)
A771 330µF/35V; 10x12.2mm
100,000
1,000,000
A771 100µF/63V; 10x12.2mm
High Resistance to Ripple Current
As a result of a lower ESR, solid polymer aluminum capacitors are able to withstand higher ripple currents during normal
operation.
Allowable Ripple Current (10 kHz 125°C)
Ripple Current (ARMS)
2.5
2
1.5
1
0.5
0
470µF/16V
Aluminum Electolytic EDT series
330µF/25V
Solid Polymer Electrolytic A768 series
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
220µF/35V
100µF/50V
Solid Polymer Electrolytic A769 & A771 series
A4117_A771 • 8/8/2023
9
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Landing Pad – Millimeters
C
B
A
Diameter
A
B
C
8
10
3.1
4.5
4.2
4.4
2.2
2.2
10
(Anti-Vibration)
4.5
4.4
4.6
B
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
10
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Marking
Date Code*
Trademark
1st Digits = Rated Voltage
Letter = Year Code
Rated
Voltage
Series
Negative
Polarity
Marking
S = 2019
Final Digits = Week of the Year
01 = 1st week of the Year to
52 = 52nd week of the Year
Year Code
Date Code*
(Last 3 Digits)
Capacitance
S
2019
T
2020
U
2021
V
2022
W
2023
X
2024
Y
2025
Z
2026
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)
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Lead (+)
Lead (−)
A4117_A771 • 8/8/2023
11
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
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.
• Vapor 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
Preheat
ts
tL
td
Temperature (°C)
150 – 180
≥ 217
≥ 230
Time (seconds)
60 - 120
≤ 50
≤ 40
Temperature
260
250
≤5
1
1 or 2
–
td
°C
tL
180 °C
150 °C
Reflow Number
tp
Peak
230 °C
217
tp
ts
Time
© KEMET Electronics Corporation • One East Broward Boulevard
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A4117_A771 • 8/8/2023
12
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Lead Taping & Packaging
A±0.5
13±0.2
97±1
2±0.5
25±0.8
380±2
Size Code
B±0.2
Diameter (mm)
Reel
Quantity/SPQ
Length (mm)
Reel
Box Quantity
A
B
±0.5
±0.2
KS
8
12.2
400
2,400
26
30
MN
10
10.2
500
3,000
26
30
MN (Anti-Vibration)
10
10.4
500
3,000
26
30
MS
10
12.2
400
2,400
26
30
MS (Anti-Vibration)
10
12.4
400
2,400
26
30
Taping for Automatic Insertion Machines
0.4±0.1
4.0±0.1
+0.1
Ø1.5–0.0
B1±0.2
2.0±0.1
1.75±0.1
B0±0.2
–
–
–
+
+
+
F±0.1
W±0.3
T2±0.2
P±0.1
Polarity
User Direction of Unreeling
Size Code
Diameter
Length
W
P
F
B1
B0
T2
(mm)
(mm)
±0.3
±0.1
±0.1
±0.2
±0.2
±0.2
12.5
KS
8.0
12.2
24.0
16.0
11.5
8.7
8.7
MN
10.0
10.0
24.0
16.0
11.5
10.7
10.7
10.1
MN (Anti-Vibration)
10.0
10.4
24.0
16.0
11.5
10.7
11.2
10.3
MS
10.0
12.2
24.0
16.0
11.5
10.7
10.7
12.5
MS (Anti-Vbration)
10.0
12.4
24.0
16.0
11.5
10.7
11.2
12.7
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
13
Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
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
Floor
Slitting
Winding
Welding
Forming
Assembling
Marking
Aging
V-chip forming and
marking
Inspection
Packing
Terminal
Lead line
Rubber
Case
Anode foil
Cathode foil
Separator
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
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Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
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 • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
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Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
Product Safety cont.
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. 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.
6. Dielectric Absorption
A phenomenon known as the 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 • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
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Surface Mount Solid Polymer Aluminum Capacitors
A771 125°C, Long Life, High Ripple
KEMET Electronics Corporation Sales Offices
For a complete list of our global sales offices, please visit www.kemet.com/sales.
Disclaimer
YAGEO Corporation and its affiliates do not recommend the use of commercial or automotive grade products for high reliability applications or manned space flight.
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 indicated or that other
measures may not be required.
KEMET requires its products to be packaged and shipped on pallets. This is because KEMET’s products are specifically designed to be packed onto pallets during
shipment. If for any reason, the products are removed from pallets by the shipping party and shipped to the end customer, then additional external protection is
required. In this instance, an external box with two carton layers and an upwards orientation sticker must be used by the shipping party, with the empty space filled
with filling material, and afterwards sealing the box. If this packing and packaging guideline is not followed by the shipping party, the shipping party, and not KEMET,
will be held responsible for any packaging, packing and/or product damages upon delivery of the products to the end customer. KEMET hereby disclaims any liability
for damages to the products or otherwise that have been, or threaten to be, inflicted, result from or are in any way related to the packaging, packing or damage by the
shipping party in contravention of the packing and packaging guidelines herein.
KEMET is a registered trademark of KEMET Electronics Corporation.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4117_A771 • 8/8/2023
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