Screw Terminal Aluminum Electrolytic Capacitors
ALS32/33 Series, +85°C
Overview Applications
KEMET’s ALS32/33 Series of screw terminal capacitors KEMET’s ALS32/33 Series of capacitors is designed for
meets the requirements of the Asian market. This range industrial and commercial applications such as switch
offers high CV per unit volume coupled with high ripple mode power supplies (SMPS), uninterruptible power supply
currents and long-life performance. (UPS) systems, variable speed drives, frequency inverters,
welding equipment, and energy storage in pulse discharge
applications.
Benefits
• Case sizes and terminals for the Asian market
• Long life, up to 20,000 hours at +85°C (VR, IR applied)
• High ripple current
• Excellent surge voltage capability
• Optimized designs available upon request
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Part Number System
ALS3 2 A 391 D2C 350
Series Stud Option Termination Capacitance Code (µF) Size Code Rated Voltage (VDC)
Screw Terminal 2 = Plain Can See Termination Table First two digits See Dimension Table 350 = 350
Aluminum Electrolytic 3 = Threaded mounting represent significant 400 = 400
stud figures. Third digit 450 = 450
specifies number of 500 = 500
zeros.
One world. One KEMET
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com A4032_ALS32_33 • 4/27/2017 1
Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C
Performance Characteristics
Item Performance Characteristics
Capacitance Range 220 – 18,000 µF
Rated Voltage 350 – 500 VDC
Operating Temperature −40 to +85°C
Storage Temperature Range −55 to +85°C
Capacitance Tolerance ±20% at 100 Hz/+20°C
D (mm) Rated Voltage and Ripple Rated Voltage at +85°C (hours)
Current at +85°C (hours)
36 11,000 22,000
Operational Lifetime 51 18,000 36,000
63.5 19,000 38,000
77.90 20,000 40,000
End of Life Requirement ∆ C/C < ±10%, ESR < 2 x initial ESR value, IL < initial specified limit
Shelf Life 2,000 hours at +85°C or 30,000 hours at +40°C 0 VDC
I = 0.006 CV or 6,000 (µA, whichever is smaller)
Leakage Current
C = rated capacitance (µF), V = rated voltage (VDC). Voltage applied for 5 minutes at +20°C.
Procedure Requirements
0.75 mm displacement amplitude
or 10 g maximum acceleration.
Case Length < 220 mm Vibration applied for three 2-hour No leakage of electrolyte
sessions at 10 – 55 Hz or other visible damage.
Vibration Test Specifications (Capacitor clamped by body).
0.35 mm displacement amplitude Deviations in capacitance from
or 5 g maximum acceleration. initial measurements must not
Case Length ≥ 220 mm Vibration applied for three 0.5 exceed: Δ C/C < 5%
hour sessions at 10 – 55 Hz
(Capacitor clamped by body).
Standards IEC 60384–4 long life grade 40/85/56
Surge Voltage
Condition Voltage (VDC)
350 400 450 500
≤ 30s Surge followed by a no load 385 440 495 550
period of 330 s, 1,000 cycles at +85°C
≤ 500 ms surge, 100 cycles
at 20°C, occurring randomly 500 520 550 600
throughout the life of the capacitor
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com A4032_ALS32_33 • 4/27/2017 2
Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C
Test Method & Performance
Endurance Life Test
Conditions Performance
Temperature +85°C
Test Duration 5,000 hours
Ripple Current Rated ripple current in specified table
Voltage The sum of DC voltage and the peak AC voltage must not exceed the rated voltage of the capacitor
Performance The following specifications will be satisfied when the capacitor is tested at +20°C:
≤ 160 V Within 15% of the initial value
Capacitance Change > 160 V Within 10% of the initial value
Equivalent Series Resistance Does not exceed 200% of the initial value
Leakage Current Does not exceed leakage current limit
Termination Tables
Termination Code A C
Diameter (mm)
34.9 •
50.8 •
63.5 • •
76.2 • •
88.9 • •
Termination Thread Termination T DT Thread Depth (TD) Z
Code Style ±0.5 ±0.5 Minimum Nominal
Standard Termination Option
A (D = 36) M5 Round 7.14 8 10
A (D > 36) M5 Oval 5.5 13 10 10
Other Termination Options
C M6 Round 5.5 13 10
Dimensions in mm
Case Polarity
Due to the presence of electrolyte in the capacitor, the aluminum can and stud mounting will essentially be at the same
polarity as the negative terminal. We recommend that the stud and can be insulated (see accessories for insulating nuts).
Terminations
Aluminum inserts with M5 threads as standard, maximum torque 2NM. Optional M6 threaded inserts have a maximum
torque 4NM. Maximum torque for stud mounting M8:4NM and M12:8NM.
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com A4032_ALS32_33 • 4/27/2017 3
Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C
Dimensions – Millimeters
SIDE VIEW OVAL ROUND
Termination Code: A Termination Codes:
LT A (D = 34.9), C
L Safety Vent Safety Vent
D S V DT V DT
+ +
T TD Z Polarity TD Polarity Mark
Optional Mounting Mark
Stud (M x H) (From Deck)
Dimensions in mm Approximate
Reference Size Code D L LT S T V Mounting Mounting Weight
Size (mm) Stud (M x H) Clip Grams
±0.8 ±1.6 ±1 ±0.5 ±0.8 Nominal
36 x 55 D2C 34.9 54.0 61.5 12.8 7.14 8 M8 x 12 V3/H2/2736 80
36 x 80 D3C 34.9 79.4 87.5 12.8 7.14 8 M8 x 12 V3/H2/2736 114
36 x 93 D3L 34.9 92.1 100.5 12.8 7.14 8 M8 x 12 V3/H2/2736 131
51 x 68 K2L 50.8 66.7 73.0 22.2 5.5 13.7 M12 x 16 V4/2737 165
51 x 93 K3L 50.8 92.1 98.0 22.2 5.5 13.7 M12 x 16 V4/2737 275
51 x 115 KJA 50.8 114.3 119.0 22.2 5.5 13.7 M12 x 16 V4/2737 340
51 x 131 K5C 50.8 130.2 136.0 22.2 5.5 13.7 M12 x 16 V4/2737 385
63.5 x 93 L3L 63.5 92.1 97.0 28.5 5.5 15.8 M12 x 16 V8 430
63.5 x 115 LJA 63.5 114.3 119.0 28.5 5.5 15.8 M12 x 16 V8 535
63.5 x 131 L5C 63.5 130.2 135.0 28.5 5.5 15.8 M12 x 16 V8 600
77 x 115 NJA 76.2 114.3 119.0 31.8 5.5 19 M12 x 16 V11 770
77 x 131 N5C 76.2 130.2 135.0 31.8 5.5 19 M12 x 16 V11 865
77 x 150 N5R 76.2 149.2 154.0 31.8 5.5 19 M12 x 16 V11 990
90 x 150 Q5R 88.9 149.2 154.0 31.8 5.5 25 M12 x 16 PYC6045 1360
90 x 194 Q7L 88.9 193.7 198.0 31.8 5.5 25 M12 x 16 PYC6045 1870
90 x 220 Q8L 88.9 219.1 224.0 31.8 5.5 25 M12 x 16 PYC6045 2000
Note: Add 0.4 mm to D (1.1 mm when D = 88.9) and 1.1 mm to L for sleeving. LT listed is for A-type termination code.
Information for other termination codes is available upon request.
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com A4032_ALS32_33 • 4/27/2017 4
Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C
Shelf Life
The capacitance, ESR and impedance of a capacitor will not change significantly after extended storage periods, however
the leakage current will very slowly increase. KEMET products are particularly stable and allow a shelf life in excess of three
years at 40°C. See sectional specification under each product series for specific data.
Re-age (Reforming) Procedure
Apply the rated voltage to the capacitor at room temperature for a period of one hour, or until the leakage current has fallen
to a steady value below the specified limit. During re-aging a maximum charging current of twice the specified leakage
current or 5 mA (whichever is greater) is suggested.
Reliability
The reliability of a component can be defined as the probability that it will perform satisfactorily under a given set of
conditions for a given length of time.
In practice, it is impossible to predict with absolute certainty how any individual component will perform; thus, we must
utilize probability theory. It is also necessary to clearly define the level of stress involved (e.g. operating voltage, ripple
current, temperature and time). Finally, the meaning of satisfactory performance must be defined by specifying a set of
conditions which determine the end of life of the component.
Reliability as a function of time, R(t), is normally expressed as: R(t)=e-λt
where R(t) is the probability that the component will perform satisfactorily for time t, and λ is the failure rate.
Failure Rate
The failure rate is the number of components failing per unit time. The failure rate of most electronic components follows
the characteristic pattern:
• Early failures are removed during the manufacturing process.
• The operational life is characterized by a constant failure rate.
• The wear out period is characterized by a rapidly increasing failure rate.
The failures in time (FIT) are given with a 60% confidence level for the various type codes. By convention, FIT is expressed as
1 x 10-9 failures per hour. Failure rate is also expressed as a percentage of failures per 1,000 hours.
e.g., 100 FIT = 1 x 10-7 failures per hour = 0.01%/1,000 hours
End of Life Definition
Catastrophic Failure: short circuit, open circuit or safety vent operation
Parametric Failure:
• Change in capacitance > ±10%
• Leakage current > specified limit
• ESR > 2 x initial ESR value
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Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C
MTBF
The mean time between failures (MTBF) is simply the inverse of the failure rate.
MTBF= 1/λ
early failures wear out
Failure Rate
operational life
Time
The failure rate is derived from our periodic test results. The failure rate (λR) is, therefore, only given at test temperature for
life tests. An estimation is also given at 40°C. The expected failure rate for this capacitor range is based on our periodic test
results for capacitors with structural similarity. Failure rate is frequently quoted in FIT (Failures In Time) where 1 FIT = 1 x 10-9
failures per hour. Failure rate per hour includes both catastrophic and parametric failures.
Ta Failure Rate per Hour
85°C 250 FIT
40°C 12 FIT
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 world wide 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.
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com A4032_ALS32_33 • 4/27/2017 6
Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C
Table 1 – Ratings & Part Number Reference
Rated Case Size Ripple Current ESR Impedance
VDC Capacitance Size Code Maximum Maximum Part Number
120 Hz D x L (mm) 120 Hz 20 kHz 120 Hz 20 kHz
25°C (µF) 85°C (A) 85°C (A) 25°C (mΩ) 25°C (mΩ)
350 390 D2C 36 x 55 2.8 5.2 352 227 ALS3(1)(2)391D2C350
350 470 D3C 36 x 80 3.5 6.7 291 187 ALS3(1)(2)471D3C350
350 560 D3C 36 x 80 3.8 7.2 245 158 ALS3(1)(2)561D3C350
350 680 D3C 36 x 80 4.1 7.7 203 132 ALS3(1)(2)681D3C350
350 820 D3L 36 x 93 4.8 8.8 170 110 ALS3(1)(2)821D3L350
350 1000 D3L 36 x 93 5.2 9.3 141 92 ALS3(1)(2)102D3L350
350 1200 K2L 51 x 68 5.5 8.9 116 75 ALS3(1)(2)122K2L350
350 1500 K2L 51 x 68 5.8 8.9 99 66 ALS3(1)(2)152K2L350
350 1800 K3L 51 x 93 7.7 12.5 78 50 ALS3(1)(2)182K3L350
350 2200 K3L 51 x 93 8.2 12.5 67 44 ALS3(1)(2)222K3L350
350 2700 K5C 51 x 131 10.4 16.7 52 34 ALS3(1)(2)272K5C350
350 3300 K5C 51 x 131 11.1 16.8 45 30 ALS3(1)(2)332K5C350
350 3900 LJA 63.5 x 115 10.8 15.3 38 25 ALS3(1)(2)392LJA350
350 5600 NJA 77 x 115 16.4 22.7 30 21 ALS3(1)(2)562NJA350
350 6800 N5C 77 x 131 18.2 23.6 28 21 ALS3(1)(2)682N5C350
350 8200 N5R 77 x 150 19.9 25.5 24 18 ALS3(1)(2)822N5R350
350 10000 Q5R 90 x 150 25.5 33.5 18 13 ALS3(1)(2)103Q5R350
350 12000 Q5R 90 x 150 25.9 32.4 16 12 ALS3(1)(2)123Q5R350
350 15000 Q7L 90 x 194 32.4 41.2 13 10 ALS3(1)(2)153Q7L350
350 18000 Q8L 90 x 220 38.5 47.6 12 9 ALS3(1)(2)183Q8L350
400 330 D2C 36 x 55 2.6 5.4 351 207 ALS3(1)(2)331D2C400
400 390 D3C 36 x 80 3.3 6.9 295 174 ALS3(1)(2)391D3C400
400 470 D3C 36 x 80 3.6 7.5 246 146 ALS3(1)(2)471D3C400
400 560 D3C 36 x 80 3.9 8.0 208 123 ALS3(1)(2)561D3C400
400 680 D3L 36 x 93 4.5 8.7 182 112 ALS3(1)(2)681D3L400
400 820 D3L 36 x 93 4.9 9.2 152 94 ALS3(1)(2)821D3L400
400 1000 K2L 51 x 68 5.2 9.0 132 84 ALS3(1)(2)102K2L400
400 1200 K2L 51 x 68 5.6 9.1 113 74 ALS3(1)(2)122K2L400
400 1500 K3L 51 x 93 7.3 12.4 89 57 ALS3(1)(2)152K3L400
400 1800 K3L 51 x 93 7.8 12.5 76 50 ALS3(1)(2)182K3L400
400 2200 K5C 51 x 131 9.8 16.4 59 37 ALS3(1)(2)222K5C400
400 2700 L3L 63.5 x 93 11.3 18.3 49 31 ALS3(1)(2)272L3L400
400 3300 LJA 63.5 x 115 13.2 21.1 40 26 ALS3(1)(2)332LJA400
400 3900 L5C 63.5 x 131 14.6 22.1 37 25 ALS3(1)(2)392L5C400
400 4700 NJA 77 x 115 15.9 22.7 32 21 ALS3(1)(2)472NJA400
400 5600 N5C 77 x 131 17.6 23.7 30 21 ALS3(1)(2)562N5C400
400 6800 N5R 77 x 150 19.3 25.6 25 18 ALS3(1)(2)682N5R400
400 8200 Q5R 90 x 150 25.6 36.3 18 12 ALS3(1)(2)822Q5R400
400 10000 Q5R 90 x 150 26.5 35.6 16 11 ALS3(1)(2)103Q5R400
400 12000 Q7L 90 x 194 30.9 40.7 14 10 ALS3(1)(2)123Q7L400
400 15000 Q8L 90 x 220 37.4 47.7 12 9 ALS3(1)(2)153Q8L400
450 270 D2C 36 x 55 2.5 5.4 383 215 ALS3(1)(2)271D2C450
450 330 D3C 36 x 80 3.2 6.9 312 175 ALS3(1)(2)331D3C450
450 390 D3C 36 x 80 3.4 7.4 265 149 ALS3(1)(2)391D3C450
450 470 D3C 36 x 80 3.7 7.9 221 125 ALS3(1)(2)471D3C450
450 560 D3L 36 x 93 4.2 8.6 196 115 ALS3(1)(2)561D3L450
450 680 D3L 36 x 93 4.6 9.2 163 96 ALS3(1)(2)681D3L450
450 820 K2L 51 x 68 5.0 9.0 142 86 ALS3(1)(2)821K2L450
450 1000 K2L 51 x 68 5.3 9.1 120 75 ALS3(1)(2)102K2L450
450 1200 K3L 51 x 93 6.9 12.3 94 56 ALS3(1)(2)122K3L450
450 1500 KJA 51 x 115 8.1 14.5 75 45 ALS3(1)(2)152KJA450
450 1800 K5C 51 x 131 9.3 16.3 63 38 ALS3(1)(2)182K5C450
450 2200 L3L 63.5 x 93 10.7 18.3 53 32 ALS3(1)(2)222L3L450
450 2700 LJA 63.5 x 115 12.5 21.1 43 26 ALS3(1)(2)272LJA450
450 3300 L5C 63.5 x 131 14.6 24.1 36 22 ALS3(1)(2)332L5C450
450 3900 NJA 77 x 115 15.3 22.7 33 22 ALS3(1)(2)392NJA450
450 4700 N5C 77 x 131 18.0 26.5 28 18 ALS3(1)(2)472N5C450
450 5600 N5R 77 x 150 19.7 28.4 24 16 ALS3(1)(2)562N5R450
VDC Rated Size Code Case Size Ripple Current ESR Impedance Part Number
Capacitance
(1) Mounting Code: 2 = plain can, 3 = threaded mounting stud
(2) Termination Code: See Termination Tables for available options
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com A4032_ALS32_33 • 4/27/2017 7
Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C
Table 1 – Ratings & Part Number Reference cont'd
Rated Case Size Ripple Current ESR Impedance
VDC Capacitance Size Code Maximum Maximum Part Number
120 Hz D x L (mm) 120 Hz 20 kHz 120 Hz 20 kHz
25°C (µF) 85°C (A) 85°C (A) 25°C (mΩ) 25°C (mΩ)
450 6800 Q5R 90 x 150 24.6 36.3 19 13 ALS3(1)(2)682Q5R450
450 8200 Q5R 90 x 150 25.7 35.8 17 12 ALS3(1)(2)822Q5R450
450 10000 Q7L 90 x 194 30.0 40.7 15 10 ALS3(1)(2)103Q7L450
450 12000 Q8L 90 x 220 35.7 46.9 14 10 ALS3(1)(2)123Q8L450
500 220 D2C 36 x 55 2.3 4.1 602 427 ALS3(1)(2)221D2C500
500 270 D3C 36 x 80 2.9 5.3 489 347 ALS3(1)(2)271D3C500
500 330 D3C 36 x 80 3.2 5.8 402 285 ALS3(1)(2)331D3C500
500 390 D3C 36 x 80 3.5 6.2 341 243 ALS3(1)(2)391D3C500
500 470 D3L 36 x 93 3.9 6.8 303 221 ALS3(1)(2)471D3L500
500 560 D3L 36 x 93 4.3 7.3 256 187 ALS3(1)(2)561D3L500
500 680 K2L 51 x 68 4.6 7.4 219 162 ALS3(1)(2)681K2L500
500 820 K2L 51 x 68 4.9 7.7 186 138 ALS3(1)(2)821K2L500
500 1000 K3L 51 x 93 6.4 10.3 146 107 ALS3(1)(2)102K3L500
500 1200 KJA 51 x 115 7.2 11.0 142 109 ALS3(1)(2)122KJA500
500 1500 K5C 51 x 131 8.4 12.7 114 88 ALS3(1)(2)152K5C500
500 1800 L3L 63.5 x 93 9.9 15.3 83 61 ALS3(1)(2)182L3L500
500 2200 LJA 63.5 x 115 11.6 17.8 68 51 ALS3(1)(2)222LJA500
500 2700 L5C 63.5 x 131 13.2 19.3 65 50 ALS3(1)(2)272L5C500
500 3300 NJA 77 x 115 14.2 19.7 56 44 ALS3(1)(2)332NJA500
500 3900 N5C 77 x 131 16.9 23.5 42 32 ALS3(1)(2)392N5C500
500 4700 N5R 77 x 150 18.5 25.3 35 27 ALS3(1)(2)472N5R500
500 5600 Q5R 90 x 150 23.1 32.2 29 22 ALS3(1)(2)562Q5R500
500 6800 Q5R 90 x 150 24.1 32.3 25 19 ALS3(1)(2)682Q5R500
500 8200 Q7L 90 x 194 28.6 37.8 21 16 ALS3(1)(2)822Q7L500
500 10000 Q8L 90 x 220 34.4 44.3 18 14 ALS3(1)(2)103Q8L500
VDC Rated Size Code Case Size Ripple Current ESR Impedance Part Number
Capacitance
(1) Mounting Code: 2 = plain can, 3 = threaded mounting stud
(2) Termination Code: See Termination Tables for available options
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Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C
Mechanical Data
Polarity and Reversed Voltage
Aluminium Electrolytic capacitors manufactured for use in DC applications contain an anode foil and a cathode foil. As such,
they are polarized devices and must be connected with the +ve to the anode foil and the -ve to the cathode foil. If this were
to be reversed then the electrolytic process that took place in forming the oxide layer on the anode would be recreated in
trying to form an oxide layer on the cathode. In forming the cathode foil in this way, heat would be generated and gas given
off within the capacitor, usually leading to catastrophic failure.
The cathode foil already possesses a thin stabilized oxide layer. This thin oxide layer is equivalent to a forming voltage
of approximately 2 V. As a result, the capacitor can withstand a voltage reversal of up to 2 V for short periods. Above this
voltage, the formation process will commence. Aluminium Electrolytic capacitors can also be manufactured for use in
intermittent AC applications by using two anode foils in place of one anode and one cathode.
Mounting Position
The capacitor can be mounted in any position as long as the safety vent can operate. It is possible for some electrolyte to be
expelled. As this is a conducting liquid, suitable precautions should be initiated by the system designer to avoid secondary
short circuits.
The capacitors are designed to be mounted in free air and are not suitable for submersion in liquid.
Vibration
10 – 55 Hz at 0.75 mm or 10 g for 3 x 2 hours duration, except 220 mm long cans 10 – 55 Hz at 0.35 mm or 5 g for 3 x 0.5
hours duration. Custom designs can be made in a 66 mm diameter (M6 deck), with a vibration capability of 20 g (10 – 56 Hz
at 0.75 mm and 56 – 500 Hz 20 g for 3 x 0.5 hours duration)
Insulating Resistance
≥ 100 MΩ at 100 VDC across insulating sleeve. UL recognized sleeving is available for custom parts in this range, upon
request.
(UL No. E358957)
Voltage Proof
≥ 2,500 VDC across insulating sleeve
Safety Vent
A safety vent for overpressure is featured on terminal deck. This is in the form of a rubber plug designed to relieve build-up
of internal pressure due to overstress or catastrophic failure.
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Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C
Marking
KEMET Logo
Rated Capacitance,
Capacitance Tolerance Rated Voltage (VDC)
Climatic Category Part Number Code
Date of Manufacture,
Batch Number
Polarity Stripe (−)
(Not Shown)
Construction
Detailed Cross Section
Insulating End Disc Screw Terminal Safety Vent
Deck
Insulating Sleeve Laser Welded
Aluminum Can Terminal Tab
Laser Welded Margin
Terminal Tabs Aluminum Can
Insulating Sleeve
Paper Spacer Impregnated Deck
with Electrolyte Polarity Mark (+)
(First Layer)
Cathode Aluminum Screw Terminal (+)
Foil, Etched
(Second Layer) Safety Vent Plug
Paper Spacer Impregnated Anode Aluminum Foil, Etched,
with Electrolyte Covered with Aluminum Oxide
(Third Layer) (Fourth Layer) Screw Terminal (−)
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Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°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 Extended cathode
cathode foils are then interleaved with absorbent paper and wound
into a cylinder. During the winding process, aluminum tabs are Anode foil
attached to each foil to provide the electrical contact.
The deck, complete with terminals, is attached to the tabs and then Foil tabs
folded down to rest on top of the winding. The complete winding
is impregnated with electrolyte before being housed in a suitable
container, usually an aluminum can, and sealed. Throughout the Tissues
process, all materials inside the housing must be maintained at the
highest purity and be compatible with the electrolyte. Cathode foil
Each capacitor is aged and tested before being sleeved and packed.
The purpose of aging is to repair any damage in the oxide layer Etching
and thus reduce the leakage current to a very low level. Aging is
normally carried out at the rated temperature of the capacitor and Forming
is accomplished by applying voltage to the device while carefully
controlling the supply current. The process may take several hours to
complete. Winding
Damage to the oxide layer can occur due to variety of reasons: Decking
• Slitting of the anode foil after forming
• Attaching the tabs to the anode foil
• Minor mechanical damage caused during winding Impregnation
A sample from each batch is taken by the quality department after
completion of the production process. This sample size is controlled Assembly
by the use of recognized sampling tables defined in BS 6001.
The following tests are applied and may be varied at the request Aging
of the customer. In this case the batch, or special procedure, will
determine the course of action. Testing
Electrical: Mechanical/Visual:
• Leakage current • Overall dimensions Sleeving
• Capacitance • Torque test of mounting stud
• ESR • Print detail Packing
• Impedance • Box labels
• Tan Delta • Packaging, including packed
quantity
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Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C
KEMET Electronics 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 A4032_ALS32_33 • 4/27/2017 12
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