KP2A220LR

KP Series CHIP TYPE, NON-POLARIZED WITH WIDE TEMPERATURE RANGE Non-polarized with wide temperature range up to +105 C Load life of 1000 hours Comply with the RoHS directive (2002/95/EC) SPECIFICATIONS Items Operation Temperature Range Rated Working Voltage Capacitance Tolerance Leakage Current I Characteristics -55 ~ +105°C 6.3 ~ 50V ±20% at 120Hz, 20°C 0.05CV or 10 A whichever is greater (after 2 minutes) V: Rated voltage (V) 35 0.15 25 2 4 35 2 3 50 0.15 50 2 3 I: Leakage current ( A) C: Normal capacitance ( F) Measurement frequency: 120Hz, Temperature: 20°C WV 6.3 10 16 25 tan Low Temperature Characteristics (Measurement frequency: 120Hz) Load Life (After 1000 hours application of the rated voltage at 105°C with the polarity inverted every 250 hours, capacitors meet the characteristics requirements listed.) Dissipation Factor max. 0.24 Rated voltage (V) 0.20 0.17 6.3 4 8 10 3 6 0.17 16 2 4 Impedance ratio ZT/Z20 (max.) Z(-25°C) / Z(20°C) Z(-40°C) / Z(20°C) Capacitance Change Dissipation Factor Leakage Current Within 20% of initial value 200% or less of initial specified value Initial specified value or less Shelf Life After leaving capacitors under no load at 105°C for 1000 hours, they meet the specified value for load life characteristics listed above. After reflow soldering according to Reflow Soldering Condition (see page 8) and restored at room temperature, they meet the characteristics requirements listed as below. Resistance to Soldering Heat Capacitance Change Dissipation Factor Leakage Current Within 10% of initial value Initial specified value or less Initial specified value or less JIS C-5141 and JIS C-5102 Reference Standard DRAWING (Unit: mm) 0.3max. C 0.2 A 0.2 0.5Max. A 0.2 E Plastic plateform Positive 0.5 D B 0.2 L +0.1 -0.2 Negative 0.5~0.8 *Voltage mark for 6.3V is [6V] DIMENSIONS (Unit: mm) DxL A B C E L 4 x 5.4 1.8 4.3 4.3 1.0 5.4 5 x 5.4 2.1 5.3 5.3 1.3 5.4 6.3 x 5.4 2.4 6.6 6.6 2.2 5.4 DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com KP Series DIMENSIONS & MAXIMUM PERMISSIBLE RIPPLE CURRENT WV F 0.1 0.22 0.33 0.47 1 2.2 3.3 4.7 10 22 33 47 5 x 5.4 6.3 x 5.4 6.3 x 5.4 28 37 45 4 x 5.4 6.3 x 5.4 6.3 x 5.4 17 33 41 4 x 5.4 5 x 5.4 6.3 x 5.4 6.3 x 5.4 12 23 37 49 Case size Ripple current 6.3 10 16 25 35 50 4 x 5.4 4 x 5.4 4 x 5.4 4 x 5.4 4 x 5.4 1.0 2.0 2.8 4.0 8.4 13 17 20 4 x 5.4 5 x 5.4 5 x 5.4 6.3 x 5.4 12 16 18 5 x 5.4 5 x 5.4 6.3 x 5.4 8.4 16 18 29 5 x 5.4 5 x 5.4 6.3 x 5.4 Case size ∅D×L (mm), ripple current (mA rms) at 105°C 120Hz FREQUENCY COEFFICIENT OF ALLOWABLE RIPPLE CURRENT Frequency Coefficient 50Hz 0.70 120Hz 1.00 300Hz 1.17 1KHz 1.36 10KHz~ 1.50 Note: All design and specifications are for reference only and is subject to change without prior notice. If any doubt about safety for your application, please contact us immediately for technical assistance before purchase. DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com EXPLANATION OF PART NUMBERS 1 2 3 4 5 6 7 8 9 _ 10 11 12 13 14 15 16 17 18 Series Voltage (WV) Capacitance ( F) Cap. Tol.(%) Dash Type Lead Process Dia.( ) Length (mm) Sleeve Rubber Lead Shape Chip Type (1, 2) (3, 4) Series CS CK SC CN KP LZ KZ FZ EL KL KH HU RA RN RT RK RM RS LA LK LM LS NP NK NM NS BP TM TN SM SK Vol. (WV) 2 4 6.3 10 16 25 35 40 50 63 100 160 200 250 315 330 350 400 450 Code 0D 0G 0J 1A 1C 1E 1V 1G 1H 1J 2A 2C 2D 2E 2F 2U 2V 2G 2W (5~7) Cap. ( F) 0.1 0.22 0.33 0.47 1 2.2 3.3 4.7 10 22 33 47 100 220 330 470 1000 2200 3300 4700 10000 22000 Code 0R1 R22 R33 R47 010 2R2 3R3 4R7 100 220 (8) Tol. (%) +10 -10 +15 L -15 +20 M -20 Code (10) Type Chip Radial Radial Taping Snap-in Code C R T S (12) Dia. () 3 4 5 6.3 8 Code S C D E F G H I J V A K L M N O P Q R (13, 14) Length (mm) 5 5.4 5.8 7 7.7 9 10.5 11 12 14 16 20 21 25 26 31 35 36 40 46 Code 05 54 58 07 77 09 10 11 12 14 16 20 21 25 26 31 35 36 40 46 K (11) Type Chip Descriptions Taping & Reel Bulk Code R B 10 12 12.5 13 13.5 14.5 Taping (Forming) Taping (Straight) Lead Cut Lead Forming Cut Lead Forming Only Kinked Forming Cut Kinked Straight Cut A S C F M K Y W 16 18 20 22 25 30 35 40 330 470 101 221 331 471 102 222 332 472 103 223 Snapin Radial Lead Snap-in (15) Sleeve PVC sleeve (White printing) PVC sleeve (Black printing) PVC sleeve (Golden printing) PVC sleeve (Silver printing) PET sleeve (Green colour white printing) PET sleeve (Purple colour white printing) PET sleeve (Yellow colour black printing) Code W B G A 1 2 3 (16) Rubber Plane Convexity Code P T (17, 18) Lead Shape Standard Not standard Length after cut is 3mm Length after cut is 4.5mm Length after cut is 5mm Length after cut is 7.5mm Length after cut is 10mm Code 00 01 30 45 50 75 1A DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com CORRESPONDING TO RoHS DIRECTIVE Aluminum electrolytic capacitors RoHS compliant RoHS restricted substances Most concerns on terminals Plating on terminals Construction of terminals Plating characters Insulating sleeve Fe/Cu/Sn Plating thickness 12 m Plating type matte No heat treatment after plating No used Fe/Cu/Sn Plating thickness 12 m Plating type matte No heat treatment after plating Replace PVC with PET (where customer designated) Fe/Cu/Sn Plating thickness 10 m Plating type matte No heat treatment after plating Replace PVC with PET (where customer designated) Chip type Yes Radial lead type Yes Snap-in type Yes Change plating from Sn-Pb to Sn Change plating from Sn-Pb to Sn Change plating from Sn-Pb to Sn Pb Resistance to soldering heat Please see "Lead Free Reflow Soldering Condition" for chip type aluminum electrolytic capacitors No difference with Sn-Pb No difference with Sn-Pb No difference with Sn-Pb Room storage test: 20~25 C, 30~80%RH, 4000hrs. Aging test: 60 5 C, 93 +2/-3%RH, 4000hrs. Thermal cycle test: -55 +0/-10 C to 85 +10/-0 C, 3 cycles/hour, 1000 cycles < 2ppm < 2ppm < 2ppm Not detected Not detected Add "Pb free" or "RoHS" marking on inner and outer carton label (where customer designated) Not available No need for dry package No change No change Solderability Tensile strength No difference with Sn-Pb No difference with Sn-Pb No difference with Sn-Pb Room storage test: 20~25 C, 30~80%RH, 4000hrs. Aging test: 60 5 C, 93 +2/-3%RH, 4000hrs. Thermal cycle test: -55 +0/-10 C to 85 +10/-0 C, 3 cycles/hour, 1000 cycles < 2ppm < 2ppm < 2ppm Not detected Not detected Add "Pb free" or "RoHS" marking on inner and outer carton label (where customer designated) Not available No need for dry package No difference with Sn-Pb No difference with Sn-Pb Whisker is not observed Room storage test: 20~25 C, 30~80%RH, 4000hrs. Aging test: 60 5 C, 93 +2/-3%RH, 4000hrs. Thermal cycle test: -55 +0/-10 C to 85 +10/-0 C, 3 cycles/hour, 1000 cycles < 2ppm < 2ppm < 2ppm Not detected Not detected Add "Pb free" or "RoHS" marking on inner and outer carton label (where customer designated) Not available No need for dry package Whisker Cr6+ Hg Cd PBB PBDE Plating material Identification for RoHS compliance products MSL Level (IPC/JEDEC J-STD-020C) DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com SERIES TABLE Chip Type Aluminum Electrolytic Capacitors Capacitance ( F) Rate Voltage (V.D.C.) Operating Temperature (°C) Load Life (Hours) Capacitance Tolerance (%) Applications Series Features CS Standard CK Low Leakage Current Standard size Standard size, wide temperature range 0.1 ~ 1500 4 ~ 100 -40 ~ +85 2000 20 0.1 ~ 1500 4 ~ 50 -55 ~ +105 2000 20 SC Low leakage current 0.1 ~ 100 6.3 ~ 50 -40 ~ +85 1000 20 CN Non-polarized KP Non-polarized Non-polarized, wide temperature range 0.1 ~ 100 6.3 ~ 50 -40 ~ +85 1000 20 0.1 ~ 47 6.3 ~ 50 -55 ~ +105 1000 20 LZ Low Impedance KZ Low impedance 1 ~ 1500 6.3 ~ 50 -55 ~ +105 2000 20 Extra low impedance 4.7 ~ 1500 6.3 ~ 50 -55 ~ +105 2000 20 FZ Long life, extra low impedance 4.7 ~ 1500 6.3 ~ 35 -55 ~ +105 3000 20 Long Life EL Long life assurance 0.1 ~ 1500 6.3 ~ 50 -55 ~ +105 3000 20 KL 5000 hours load life 0.1 ~ 4700 6.3 ~ 100 -40 ~ +105 5000 20 High Reliability KH High reliability 10 ~ 330 10 ~ 50 -40 ~ +125 2000 20 High Voltage HU Mid-to-high voltage 3.3 ~ 68 160 ~ 450 -40 ~ +105 5000 20 DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com SERIES CHART Chip Type Aluminum Electrolytic Capacitors KP 105 C Non-polarized Wide temperature CN 85 C Non-polarized Non-polarized SC 85 C Low leakage current Low leakage current CS 85 C Standard Wide temperature KH 125 C High reliability Higher reliability EL 105 C Long life assurance Longer life CK 105 C Wide temperature Extra longer life Low impedance HU Mid-to-high voltage Higher Voltage KL 105 C 5000 hours load life LZ 105 C Low impedance Extra Low impedance FZ 105 C Long life with extra lower impedance Longer life KZ 105 C Extra lower impedance DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com GENERAL INFORMATION FOR APPLICATION The following precautions must be observed when using electrolytic capacitors. 1. Circuit Design 1) Please make sure that the environmental and mounting conditions to which the capacitor to be exposed are within the conditions specified in this catalogue. 2) Operating temperature and applied ripple must be within the specifications. 3) Appropriate capacitors, which comply with the life requirement of the products, should be selected when designing the circuit. 4) Aluminum electrolytic capacitors are polarized. Do not apply reserve voltage or AC voltage. Please use non-polarized capacitors for a circuit that can possibly see reserved polarity. Note: Non-polarizes capacitors cannot be used for AC voltage application. 5) Do not use aluminum electrolytic capacitors in a circuit that requires rapid and very frequent charge or discharge. In this type of circuit, it is necessary to use special design capacitors with extended life characteristics. 6) Do not apply excess voltage. Pleased pay attention so that the peak voltage, which is DC voltage overlapped by ripple current, should not exceed the rated voltage. In the case where more than two aluminum electrolytic capacitors are used in series, please make sure that applied voltage should be lower than rated voltage should be applied to each capacitor equally using a balancing resistor in parallel with the capacitor. 7) Outer sleeved of the capacitor is not guarantee as an electrical insulator. Do not use standard sleeve on a capacitor in applications that require electrical insulation. When the application requires special insulation, please contact our sales office for details. 8) Capacitors must not be used under following conditions: (a) Capacitors must not be exposed to water (including condensation), brine or oil. (b) Ambient conditions that include toxic gases such as hydrogen sulfide, sulfurous acid, nitrous acid, chlorine, ammonium, etc. (c) Ambient conditions that expose the capacitor to ozone, ultraviolet ray and radiation. Severe vibration and physical shock conditions that exceed our specification. Vibration test condition: Vibration frequency range: 10~55~10Hz Sweet rate : 10~55~10Hz per minute Sweet method : logarithmic Amplitude or acceleration: 1.5 (max. acceleration is 10G) Direction of vibration : X, Y, Z direction Testing time : 2 hours per each direction Shock is not applicable normally. If a particular condition is required, please contact our sales office. DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com 9) When designing a circuit board, please pay attention to the following: Make the pad spacing on the PC board matching with the lead space of the capacitor. There should not be any circuit pattern or circuit wire above the capacitor safety vent. 10) The main chemical solution of the electrolyte and the separator paper in the capacitor are combustible. The electrolyte is conductive. When it comes in contact with the PC board, there is a possibility of pattern or short circuit between the circuit pattern, which could result in smoking or fire. Do not locate any circuit pattern beneath the capacitor end seal. 11) Do not design a circuit board so that heat generating components are placed near an aluminum electrolytic capacitor or reserve side of PC board (under the capacitor). 12) Please refer to the pad size layout recommendations in our catalogue when designing in surface mount capacitors. 13) Electrical characteristics may vary depending on changes in temperature and frequency. Please consider the variation when you design circuits. 14) When you install more than 2 capacitors in parallel, consider the balance of current following in to the capacitor. 2. Mounting 1) Once a capacitor has been assembled in the set and power applied, do not attempt to re-use the capacitor in other circuits or application. 2) Electric potential between positive and negative terminal may exist as a result of returned electromotive force, so please discharge the capacitor using 1K resistor. 3) Leakage current of the parts that have stored for long period may increase. When leakage current 4) 5) 6) 7) 8) has increased, please perform a voltage treatment using a 1K resistor. Please confirm rating and polarity before installing capacitor on the PC board. Be careful not to deform the capacitor during installation. Please confirm that the lead spacing of the capacitor matches the pad spacing of the PC board prior to installation. Please pay attention to the mechanical shock to the capacitor by suction nozzle of the automatic insertion machine or automatic mounted, or by product checker, or by centering mechanism. Reflow soldering: Please see "Lead Free Reflow Soldering Condition" for chip type aluminum electrolytic capacitors (page 8). 9) Do not tilt, lay down or twist the capacitor body after the capacitors are soldered to the PC board. 10) Do not carry the PC board by grasping the soldered capacitor. 11) Please do not allow anytime to touch the capacitor after soldering. If PC board are stored in stack, please make sure PC board or the other components do not touch the capacitor. The capacitor shall not be effected by any radiated heat from the soldered PC board or other components after soldering. 12) Cleaning Do not clean capacitors with halogenated cleaning agent. However, if it is necessary to clean with halogenated cleaning agent, please contact our sales office. Recommended cleaning method: Applicable : Any type, any ratings Cleaning agents : Pine Alpha ST-100S, cleaning through 750H/750L/710M, Sanelek B-12, Aqua Cleaner 210SEP, Techno Care FRW14~17, Isopropyl Alcohol. DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com Cleaning condition: Total cleaning time shall be within 5 minutes by immersion, ultrasonic or other method. Temperature of the cleaning agent shall be 60 C or lower. After cleaning, capacitors should be dried using hot air for minimum of 10 minutes along with the PC board. Hot air temperature should be below the maximum operating temperature of the capacitor. Insufficient dry after water rinse may cause appearance problems, sleeve shirk, bottom- plate bulge and such. Avoid using ozone destructive substance for cleaning agents to concern about global environment. Please consult us regarding other cleaning agents or cleaning methods. 3. In The Equipment 1) Do not directly touch terminal by hand. 2) Do not short between terminal by conductor, nor spill conductible liquid such as alkaline or acidic solution on or near the capacitor. 3) Please make sure that the ambient conditions where the set is installed will be free from spilling water or oil, direct sunlight, ultraviolet rays, radiation, poisonous gases, vibration or mechanical shock. 4. Maintenance and Inspection Please periodically inspect the aluminum capacitors that are installed in industrial equipment. The following Items should be checked: Appearance: Remarkable abnormality such as vent operation, leaking electrolyte etc. Electrical characteristic: Capacitance, dielectric loss tangent, leakage current etc., which are specified in this catalogue. 5. In an Emergency 1) If you see smoke due to operation of safety vent, turn off the main switch or pull out the plug from the outlet. 2) Do not draw your face to the safety vent since gas over 100 C will be emitted when the safety vent operates. If the gas has entered your eyes, please flush your eyes immediately in pure water. If you breathed the gas immediately wash out your mouth and throat with water. Do not ingest electrolyte. If your skin is exposed to electrolyte, please wash it away using soap and water. 6. Storage 1) Do not keep capacitor in high temperature and high humidity. Storage conditions should be: Temperature : +5 C ~ +35 C Humidity : Lower than 75% Place : Indoor 2) Avoid ambient conditions where capacitors can be covered with water, brine or oil. 3) Avoid ambient conditions where capacitors are exposed to poisonous gases such as hydrogen sulfide, sulfurous acid, nitrous acid, chlorine, ammonium etc. 4) Do not keep capacitor in conditions that expose the capacitor to ozone, ultraviolet ray or radiation. 7. Disposal Please dispose capacitors in either of the following ways: 1) Incinerate capacitors after crushing parts or making a hole on the capacitor body. 2) Bury capacitors in the ground. Please have a disposal specialist do it. DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com LEAD FREE REFLOW SOLDERING CONDITION (Applicable to Chip Type Aluminum Electrolytic Capacitors) Recommended Conditions for Reflow Soldering (1) A thermal condition system such as infrared radiation (IR) or hot blast should be adopted, and vapor heat transfer systems (VPS) are not recommended. (2) Reflow soldering should be performed one time. If the capacitor has to be reflowed twice, 30 minutes must be layout between each time. (3) For lead-free type reflow soldering, please observe proper conditions below: a) The time of preheating from 150°C to 200°C shall be within maximum 180 seconds; b) The time of soldering temperature at 217°C measured on capacitors' top shall not exceed tL (second); c) The peak temperature on capacitors' top shall not exceed Tp(°C), and the time within 5°C of actual peak temperature shall not exceed tp (second). Classification Reflow Profile Tp Ramp-up *1 tp Critical Zone 217 t o Tp 21 7 Te m p er a tu r e 20 0 15 0 P re h e a t 1 8 0 s ec Ma x 25 2 5 t o Pe a k * 3 t L Ramp-down *2 T im e Allowable Range of Peak Temperature Size 4~ 6.3, 8 6.2L Thickness (mm) 2.5 2.5 2.5 2.5 Volume (mm ) 2000 3 *1. Average ramp-up rate is 3 /second max. *2. Ramp-down rate is 6 /second max. *3. Time from 25 to peak temperature is 8 minutes max. Tp(°C) 250±0 240±0 235±0 230±0 tL (second) 90 90 60 30 (20*) tp (second) 5 5 5 5 8 10.5L 10 10.5L/13.5L 12.5, 16 Re: (20*) is special for mid-to-high voltage which is HU series. Recommended Land Size (Unit: mm) Size 4 5 6.3 8×6.2L 8×10.5L 10 12.5 16×16.5/21.5 a 1.6 1.6 1.6 2.1 3.0 4.0 4.0 6.0 b 2.6 3.0 3.5 4.5 3.5 4.0 5.7 6.5 c 1.6 1.6 1.6 1.6 2.5 2.5 3.0 3.5 DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com Taping Specifications for Chip Type Aluminum Electrolytic Capacitors Carrier Tape Drawing 1 (for 4~ 10) 4.0±0.1 1.5 +0.1~-0 2.0±0.1 0.4 1.75±0.1 W±0.3 F±0.1 P±0.1 B±0.2 A±0.2 T2±0.2 Dimension DL W P F A B T2 4 5.4/5.8 12.0 8.0 5.5 5.0 5.0 5.8/6.3 5 5.4/5.8 12.0 12.0 5.5 6.0 6.0 5.8/6.3 6.3 5.4/5.8 16.0 12.0 7.5 7.0 7.0 5.8/6.3 6.3 7.7 12.0 12.0 7.5 7.0 7.0 8.4 8 6.2 16.0 12.0 7.5 8.7 8.7 6.8 8 10.5 24.0 16.0 11.5 8.7 8.7 11.0 (Unit: mm) 10 10.5/13.5 24.0 16.0 11.5 10.7 10.7 11.0/14.0 Drawing 2 (for 12.5 ~ 16) Dimension DL W 0.3 P 0.1 F 0.1 A0 0.2 B0 0.2 B (Unit: mm) 12.5 13.5 32.0 24.0 14.2 14.0 14.0 14.0 28.4 12.5 16 32.0 24.0 14.2 14.0 14.0 16.5 28.4 T2 0.2 S 0.1 DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com Reel 3 13 0.5 50 Min. B 2.0 23 A (Unit: mm) DL A B 4 5.4/5.8 14 382 5 5.4/5.8 14 382 6.3 5.4/5.8/7.7 18 382 8 6.2/10.5 26 382 10 10.5 26 382 10 13.5 26 382/332* 12.5 13.5/16 34 382/332* 16 16.5 46 332* *For a small package Package Quantity Size ( D L) 4 5.5/5.8 5 5.4/5.8 6.3 5.4/5.8 6.3 7.7 8 6.2 8 10.5 10 10.5 10 13.5 12.5 13.5 12.5 16 16 16.5 Reel (pcs) 2,000 1,000 1,000 1,000 1,000 500 500 300/250* 200/150* 200/150* 125* In-box (reels) 6 6 5 5 5 4 4 4 3 3 2 Quantity/In-box (pcs) 12,000 6,000 5,000 5,000 5,000 2,000 2,000 1,200/1,000* 600/450* 600/450* 250* 4 In-boxes/Carton (pcs) 48,000 24,000 20,000 20,000 20,000 8,000 8,000 4,800/4000* 2,400/1,800* 2,400/1,800* 1,000* Note: All design and specifications are for reference only and is subject to change without prior notice. If any doubt about safety for your application, please contact us immediately for technical assistance before purchase. DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com LIFE OF ALUMINUM ELECTROLYTIC CAPACITORS The life of aluminum electrolytic capacitors is mainly dependent on environmental conditions (e.g. ambient temperature, humidity etc.) and electrical factors (e.g. operating temperature, ripple current etc.) Generally, the wear-out mechanism of aluminum electrolytic capacitors is based on evaporation of electrolyte through the rubber seal. Consequently, the factor of temperature (ambient temperature and internal heating due to ripple current) is the most critical to electrolytic capacitors life. The effect of voltage on capacitor life is negligible, especially for low voltage electrolytic capacitors. The lifetime of aluminum electrolytic capacitors can be expressed as following equations: Le = Lo Where: Kt Kr -------- (1) Le = Expected life at operating temperature Te (h) Lo = Specified life at temperature operating temperature To (h) Kt = Ambient temperature acceleration term Kr = Ripple current acceleration term Kt = Lo A Where: (To-Te)/10 -------- (2) To = Maximum rated operating temperature ( C) Te = Actual ambient temperature ( C) A = Acceleration coefficient (for the range from 35 C to the maximum operating temperature, A 2) Kr = 2 (- T/5) Where: -------- (3) T = An increase in core temperature by internal heating due to ripple current ( T = core temperature – ambient temperature) T can be estimated as follows: S) -------- (4) T = (I2 R)/( Where: I = Ripple current of the capacitor (A rms) R = Equivalent series resistance of the capacitor ( ) = Heat radiation coefficient of the aluminum can (W/ C S = Surface area of the capacitor (cm2) cm2) DB LECTRO Inc. 3755 Place Java, Suite 140, Brossard, Québec, J4Y 0E4, Canada - T: 1-450-444-1424 / F: 1-450-444-4714 / www.dblectro.com