Screw Terminal Aluminum Electrolytic Capacitors ALS32/33 Series, +85°C Overview Applications KEMET’s ALS32/33 Series of screw terminal capacitors meets the requirements of the Asian market. This range offers high CV per unit volume coupled with high ripple currents and long-life performance. KEMET’s ALS32/33 Series of capacitors is designed for industrial and commercial applications such as switch mode power supplies (SMPS), uninterruptible power supply (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 Click image above for interactive 3D content Open PDF in Adobe Reader for full functionality Part Number System ALS3 2 A 391 D2C 350 Series Stud Option Termination Capacitance Code (µF) Size Code Voltage (VDC) Screw Terminal Aluminum Electrolytic 2 = Plain Can 3 = Threaded mounting stud See Termination Table First 2 digits equals first 2 significant figures, 3rd digit is the number of additional zeros. See Dimension Table 350 = 350 400 = 400 450 = 450 500 = 500 One world. One KEMET © KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com A4032_ALS32_33 • 5/22/2015 1 Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C Performance Characteristics Item Performance Characteristics Capacitance Range Rated Voltage 220 – 18,000 µF 350 – 500 VDC Operating Temperature -40 to +85°C Storage Temperature Range -55 to +85°C Capacitance Tolerance ±20% at 100 Hz / +20°C Operational Lifetime End of Life Requirement Shelf Life Leakage Current D (mm) Rated Voltage and Ripple Current at +85°C (hours) Rated Voltage at +85°C (hours) 36 11,000 22,000 51 18,000 36,000 63.5 19,000 38,000 77.90 20,000 40,000 ∆ C/C < ±10%, ESR < 2 x initial ESR value, IL < initial specified limit 2,000 hours at +85°C or 30,000 hours at +40°C 0 VDC I = 0.003 CV or 6,000 (µA, whichever is smaller) C = rated capacitance (µF), V = rated voltage (VDC). Voltage applied for 5 minutes at +20°C. Procedure Case Length < 220 mm 0.75 mm displacement amplitude or 10 g maximum acceleration. Vibration applied for three 2-hour sessions at 10 – 55 Hz (Capacitor clamped by body). Case Length ≥ 220 mm 0.35 mm displacement amplitude or 5 g maximum acceleration. Vibration applied for three 0.5 hour sessions at 10 – 55 Hz (Capacitor clamped by body). Vibration Test Specifications Standards Requirements No leakage of electrolyte or other visible damage. Deviations in capacitance and tanδ from initial measurements must not exceed: ∆ C/C < 5% 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 period of 330s, 1,000 cycles at +85°C 385 440 495 550 ≤ 500 ms surge, 100 cycles at 20°C, occurring randomly throughout the life of the capacitor 500 520 550 600 © KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com A4032_ALS32_33 • 5/22/2015 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 Voltage Performance Rated ripple current in specified table The sum of DC voltage and the peak AC voltage must not exceed the rated voltage of the capacitor The following specifications will be satisfied when the capacitor is tested at +20°C: Capacitance Change Equivalent Series Resistance Leakage Current ≤ 160 V Within 15% of the initial value > 160 V Within 10% of the initial value Does not exceed 200% of the initial value Does not exceed leakage current limit Dimensions – Millimeters Reference Size Code Size (mm) Dimensions in mm Mounting Stud (M x H) Mounting Clip Approximate Weight Grams 8 M8 x 12 V3/H2/UTE2736 80 D L LT S T V ±0.8 ±1.6 ±1 ±0.5 ±0.8 Nominal 61.5 12.8 7.14 36 x 55 D2C 34.9 54.0 36 x 80 D3C 34.9 79.4 87.5 12.8 7.14 8 M8 x 12 V3/H2/UTE2736 114 36 x 93 D3L 34.9 92.1 100.5 12.8 7.14 8 M8 x 12 V3/H2/UTE2736 131 51 x 68 K2L 50.8 66.7 73.0 22.2 5.5 13.7 M12 x 16 V4/UTE2737 165 51 x 93 K3L 50.8 92.1 98.0 22.2 5.5 13.7 M12 x 16 V4/UTE2737 275 51 x 115 KJA 50.8 114.3 119.0 22.2 5.5 13.7 M12 x 16 V4/UTE2737 340 51 x 131 K5C 50.8 130.2 136.0 22.2 5.5 13.7 M12 x 16 V4/UTE2737 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 V90 1360 90 x 194 Q7L 88.9 193.7 198.0 31.8 5.5 25 M12 x 16 V90 1870 90 x 220 Q8L 88.9 219.1 224.0 31.8 5.5 25 M12 x 16 V90 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 • 5/22/2015 3 Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C Termination Tables Termination Code Diameter (mm) 34.9 50.8 63.5 76.2 88.9 Termination Code A C • • • • • • • • Termination Style Thread T DT Thread Depth (TD) Z ± 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 13 10 10 Other Termination Options C M6 Round 5.5 Dimensions in mm SIDE VIEW LT L S D Optional Mounting Stud (M x H) T (From Deck) OVAL TERMINAL END VIEW ROUND TERMINAL END VIEW Safety Vent Safety Vent V + TD Z DT Polarity Mark V + TD DT Polarity Mark 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 • 5/22/2015 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 © KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com A4032_ALS32_33 • 5/22/2015 5 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 Failure Rate early failures wear out 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. Failure Rate per Hour Ta 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 • 5/22/2015 6 Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C Table 1 – Ratings & Part Number Reference VDC 350 350 350 350 350 350 350 350 350 350 350 350 350 350 350 350 350 350 350 350 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 450 450 450 450 450 450 450 450 450 450 450 450 450 450 450 450 450 VDC Rated Capacitance 120 Hz 25°C (µF) 390 470 560 680 820 1000 1200 1500 1800 2200 2700 3300 3900 5600 6800 8200 10000 12000 15000 18000 330 390 470 560 680 820 1000 1200 1500 1800 2200 2700 3300 3900 4700 5600 6800 8200 10000 12000 15000 270 330 390 470 560 680 820 1000 1200 1500 1800 2200 2700 3300 3900 4700 5600 Rated Capacitance Size Code Case Size D x L (mm) D2C D3C D3C D3C D3L D3L K2L K2L K3L K3L K5C K5C LJA NJA N5C N5R Q5R Q5R Q7L Q8L D2C D3C D3C D3C D3L D3L K2L K2L K3L K3L K5C L3L LJA L5C NJA N5C N5R Q5R Q5R Q7L Q8L D2C D3C D3C D3C D3L D3L K2L K2L K3L KJA K5C L3L LJA L5C NJA N5C N5R 36 x 55 36 x 80 36 x 80 36 x 80 36 x 93 36 x 93 51 x 68 51 x 68 51 x 93 51 x 93 51 x 131 51 x 131 63.5 x 115 77 x 115 77 x 131 77 x 150 90 x 150 90 x 150 90 x 194 90 x 220 36 x 55 36 x 80 36 x 80 36 x 80 36 x 93 36 x 93 51 x 68 51 x 68 51 x 93 51 x 93 51 x 131 63.5 x 93 63.5 x 115 63.5 x 131 77 x 115 77 x 131 77 x 150 90 x 150 90 x 150 90 x 194 90 x 220 36 x 55 36 x 80 36 x 80 36 x 80 36 x 93 36 x 93 51 x 68 51 x 68 51 x 93 51 x 115 51 x 131 63.5 x 93 63.5 x 115 63.5 x 131 77 x 115 77 x 131 77 x 150 Size Code Case Size Ripple Current 120 Hz 85°C (A) 2.8 3.5 3.8 4.1 4.8 5.2 5.5 5.8 7.7 8.2 10.4 11.1 10.8 16.4 18.2 19.9 25.5 25.9 32.4 38.5 2.6 3.3 3.6 3.9 4.5 4.9 5.2 5.6 7.3 7.8 9.8 11.3 13.2 14.6 15.9 17.6 19.3 25.6 26.5 30.9 37.4 2.5 3.2 3.4 3.7 4.2 4.6 5.0 5.3 6.9 8.1 9.3 10.7 12.5 14.6 15.3 18.0 19.7 20 kHz 85°C (A) 5.2 6.7 7.2 7.7 8.8 9.3 8.9 8.9 12.5 12.5 16.7 16.8 15.3 22.7 23.6 25.5 33.5 32.4 41.2 47.6 5.4 6.9 7.5 8.0 8.7 9.2 9.0 9.1 12.4 12.5 16.4 18.3 21.1 22.1 22.7 23.7 25.6 36.3 35.6 40.7 47.7 5.4 6.9 7.4 7.9 8.6 9.2 9.0 9.1 12.3 14.5 16.3 18.3 21.1 24.1 22.7 26.5 28.4 Ripple Current ESR Maximum Impedance Maximum 120 Hz 25°C (mΩ) 352 291 245 203 170 141 116 99 78 67 52 45 38 30 28 24 18 16 13 12 351 295 246 208 182 152 132 113 89 76 59 49 40 37 32 30 25 18 16 14 12 383 312 265 221 196 163 142 120 94 75 63 53 43 36 33 28 24 20 kHz 25°C (mΩ) 227 187 158 132 110 92 75 66 50 44 34 30 25 21 21 18 13 12 10 9 207 174 146 123 112 94 84 74 57 50 37 31 26 25 21 21 18 12 11 10 9 215 175 149 125 115 96 86 75 56 45 38 32 26 22 22 18 16 ALS3(1)(2)391D2C350 ALS3(1)(2)471D3C350 ALS3(1)(2)561D3C350 ALS3(1)(2)681D3C350 ALS3(1)(2)821D3L350 ALS3(1)(2)102D3L350 ALS3(1)(2)122K2L350 ALS3(1)(2)152K2L350 ALS3(1)(2)182K3L350 ALS3(1)(2)222K3L350 ALS3(1)(2)272K5C350 ALS3(1)(2)332K5C350 ALS3(1)(2)392LJA350 ALS3(1)(2)562NJA350 ALS3(1)(2)682N5C350 ALS3(1)(2)822N5R350 ALS3(1)(2)103Q5R350 ALS3(1)(2)123Q5R350 ALS3(1)(2)153Q7L350 ALS3(1)(2)183Q8L350 ALS3(1)(2)331D2C400 ALS3(1)(2)391D3C400 ALS3(1)(2)471D3C400 ALS3(1)(2)561D3C400 ALS3(1)(2)681D3L400 ALS3(1)(2)821D3L400 ALS3(1)(2)102K2L400 ALS3(1)(2)122K2L400 ALS3(1)(2)152K3L400 ALS3(1)(2)182K3L400 ALS3(1)(2)222K5C400 ALS3(1)(2)272L3L400 ALS3(1)(2)332LJA400 ALS3(1)(2)392L5C400 ALS3(1)(2)472NJA400 ALS3(1)(2)562N5C400 ALS3(1)(2)682N5R400 ALS3(1)(2)822Q5R400 ALS3(1)(2)103Q5R400 ALS3(1)(2)123Q7L400 ALS3(1)(2)153Q8L400 ALS3(1)(2)271D2C450 ALS3(1)(2)331D3C450 ALS3(1)(2)391D3C450 ALS3(1)(2)471D3C450 ALS3(1)(2)561D3L450 ALS3(1)(2)681D3L450 ALS3(1)(2)821K2L450 ALS3(1)(2)102K2L450 ALS3(1)(2)122K3L450 ALS3(1)(2)152KJA450 ALS3(1)(2)182K5C450 ALS3(1)(2)222L3L450 ALS3(1)(2)272LJA450 ALS3(1)(2)332L5C450 ALS3(1)(2)392NJA450 ALS3(1)(2)472N5C450 ALS3(1)(2)562N5R450 ESR Impedance Part Number Part Number (1) Mounting Code: 0 = plain can, 1 = 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 • 5/22/2015 7 Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C Table 1 – Ratings & Part Number Reference cont'd VDC 450 450 450 450 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 VDC Rated Capacitance 120 Hz 25°C (µF) 6800 8200 10000 12000 220 270 330 390 470 560 680 820 1000 1200 1500 1800 2200 2700 3300 3900 4700 5600 6800 8200 10000 Rated Capacitance Size Code Case Size D x L (mm) Q5R Q5R Q7L Q8L D2C D3C D3C D3C D3L D3L K2L K2L K3L KJA K5C L3L LJA L5C NJA N5C N5R Q5R Q5R Q7L Q8L 90 x 150 90 x 150 90 x 194 90 x 220 36 x 55 36 x 80 36 x 80 36 x 80 36 x 93 36 x 93 51 x 68 51 x 68 51 x 93 51 x 115 51 x 131 63.5 x 93 63.5 x 115 63.5 x 131 77 x 115 77 x 131 77 x 150 90 x 150 90 x 150 90 x 194 90 x 220 Size Code Case Size Ripple Current 120 Hz 85°C (A) 24.6 25.7 30.0 35.7 2.3 2.9 3.2 3.5 3.9 4.3 4.6 4.9 6.4 7.2 8.4 9.9 11.6 13.2 14.2 16.9 18.5 23.1 24.1 28.6 34.4 20 kHz 85°C (A) 36.3 35.8 40.7 46.9 4.1 5.3 5.8 6.2 6.8 7.3 7.4 7.7 10.3 11.0 12.7 15.3 17.8 19.3 19.7 23.5 25.3 32.2 32.3 37.8 44.3 Ripple Current ESR Maximum Impedance Maximum 120 Hz 25°C (mΩ) 19 17 15 14 602 489 402 341 303 256 219 186 146 142 114 83 68 65 56 42 35 29 25 21 18 20 kHz 25°C (mΩ) 13 12 10 10 427 347 285 243 221 187 162 138 107 109 88 61 51 50 44 32 27 22 19 16 14 ALS3(1)(2)682Q5R450 ALS3(1)(2)822Q5R450 ALS3(1)(2)103Q7L450 ALS3(1)(2)123Q8L450 ALS3(1)(2)221D2C500 ALS3(1)(2)271D3C500 ALS3(1)(2)331D3C500 ALS3(1)(2)391D3C500 ALS3(1)(2)471D3L500 ALS3(1)(2)561D3L500 ALS3(1)(2)681K2L500 ALS3(1)(2)821K2L500 ALS3(1)(2)102K3L500 ALS3(1)(2)122KJA500 ALS3(1)(2)152K5C500 ALS3(1)(2)182L3L500 ALS3(1)(2)222LJA500 ALS3(1)(2)272L5C500 ALS3(1)(2)332NJA500 ALS3(1)(2)392N5C500 ALS3(1)(2)472N5R500 ALS3(1)(2)562Q5R500 ALS3(1)(2)682Q5R500 ALS3(1)(2)822Q7L500 ALS3(1)(2)103Q8L500 ESR Impedance Part Number Part Number (1) Mounting Code: 0 = plain can, 1 = 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 • 5/22/2015 8 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. © KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com A4032_ALS32_33 • 5/22/2015 9 Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C Marking KEMET Logo Rated Capacitance, Capacitance Tolerance Climatic Category Date of Manufacture, Batch Number Rated Voltage (VDC) Part Number Code Polarity Stripe (-) (Not Shown) Construction Screw Terminal Insulating End Disc Detailed Cross Section Safety Vent Deck Insulating Sleeve Laser Welded Terminal Tab Aluminum Can Laser Welded Terminal Tabs Margin Aluminum Can Insulating Sleeve Deck Paper Spacer Impregnated with Electrolyte (First Layer) Polarity Mark (+) Screw Terminal (+) Cathode Aluminum Foil, Etched (Second Layer) Paper Spacer Impregnated with Electrolyte (Third Layer) Anode Aluminum Foil, Etched, Covered with Aluminum Oxide (Fourth Layer) © KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com Safety Vent Plug Screw Terminal (-) A4032_ALS32_33 • 5/22/2015 10 Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C Construction cont'd 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. Extended cathode Anode foil 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 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 sleeved and 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 A sample from each batch is taken by the quality department after completion of the production process. The following tests are applied and may be varied at the request of the customer. In this case the batch, or special procedure, will determine the course of action. Electrical: • Leakage current • Capacitance • ESR • Impedance • Tan Delta Mechanical/Visual: • Overall dimensions • Torque test of mounting stud • Print detail • Box labels • Packaging, including packed quantity © KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com Foil tabs Tissues Cathode foil Etching Forming Winding Decking Impregnation Assembly Aging Testing Sleeving Packing A4032_ALS32_33 • 5/22/2015 11 Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C KEMET Corporation World Headquarters Europe Asia Southern Europe Sasso Marconi, Italy Tel: 39-051-939111 Northeast Asia Hong Kong Tel: 852-2305-1168 Mailing Address: P.O. Box 5928 Greenville, SC 29606 Skopje, Macedonia Tel: 389-2-55-14-623 Shenzhen, China Tel: 86-755-2518-1306 www.kemet.com Tel: 864-963-6300 Fax: 864-963-6521 Central Europe Landsberg, Germany Tel: 49-8191-3350800 Corporate Offices Fort Lauderdale, FL Tel: 954-766-2800 Kamen, Germany Tel: 49-2307-438110 North America Northern Europe Harlow, United Kingdom Tel: 44-1279-460122 Taipei, Taiwan Tel: 886-2-27528585 Espoo, Finland Tel: 358-9-5406-5000 Southeast Asia Singapore Tel: 65-6701-8033 2835 KEMET Way Simpsonville, SC 29681 Southeast Lake Mary, FL Tel: 407-855-8886 Northeast Wilmington, MA Tel: 978-658-1663 Central Novi, MI Tel: 248-306-9353 Beijing, China Tel: 86-10-5877-1075 Shanghai, China Tel: 86-21-6447-0707 Seoul, South Korea Tel: 82-2-6294-0550 Penang, Malaysia Tel: 60-4-6430200 Bangalore, India Tel: 91-806-53-76817 West Milpitas, CA Tel: 408-433-9950 Mexico Guadalajara, Jalisco Tel: 52-33-3123-2141 Note: KEMET reserves the right to modify minor details of internal and external construction at any time in the interest of product improvement. KEMET does not assume any responsibility for infringement that might result from the use of KEMET Capacitors in potential circuit designs. 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 • 5/22/2015 12 Screw Terminal Aluminum Electrolytic Capacitors – ALS32/33 Series, +85°C 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 Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com A4032_ALS32_33 • 5/22/2015 13