Elecsound Blog

Elecsound is a manufacturer of trimming potentiometers, pcbs, capacitors, leds and resistors

Radial Aluminum Electrolytic Capacitor

Elecsound offer a wide range for radila type Aluminum Electrolytic Capacitor . Such as 5mm, 7mm and 11mm. Non polar, bi polar, Low leakage, Low Impedance Aluminum Electrolytic Capacitor. Pls check below list.  
CD50S Radial 5mm Height Aluminum Electrolytic Capacitor
CD50BP Radial 5mm Height Non Polarize Aluminum Electrolytic Capacitor
CD50H Radial 105oC,5mm Height Aluminum Electrolytic Capacitor
CD11C Radial 7mm Height Aluminum Electrolytic Capacitor
CD70H Radial 105oC,7mm Height Aluminum Electrolytic Capacitor
CD71C Radial 7mm Height Bi-polar Aluminum Electrolytic Capacitor
CD71 Radial General,Bi-pollar Aluminum Electrolytic Capacitor
CD71H Radial 105oC,Bi-pollar Aluminum Electrolytic Capacitor
CD110 Radial Genaral ,Miniaturized Aluminum Electrolytic Capacitor
CD110X Radial General,SuperMiniaturize Aluminum Electrolytic Capacitor
CD263 Radial 105oC,General,for switching power supplies   Aluminum Electrolytic Capacitor
CD263X Radial 105oC,Miniaturized,for switching power supplies   Aluminum Electrolytic Capacitor
CD267 Radial Large Sized for Radial Aluminum Electrolytic Capacitor
CD11H Radial For Electronic Ballast Aluminum Electrolytic Capacitor
CD264 Radial 105oC,For Electronic Ballest,Power Supply,long life  Aluminum Electrolytic Capacitor
CD266 Radial 105oC,For Electronic Ballest,Power Supply,long life   Aluminum Electrolytic Capacitor
CD261 Radial 105oC Long Life Aluminum Electrolytic Capacitor
CD11G Radial 125oC,High Temperature,long life  Aluminum Electrolytic Capacitor
CD289 Radial 105oC,Miniaturized,Low Impedance Aluminum Electrolytic Capacitor
CD286 Radial 105oC,Low Impedance Aluminum Electrolytic Capacitor
CD287 Radial 105oC,Low Impedance,long life Aluminum Electrolytic Capacitor
CD281 Radial 105oC,Low Impedance,long life Aluminum Electrolytic Capacitor
CD282 Radial 105oC,Extra Low Impedance,long life Aluminum Electrolytic Capacitor
CD283 Radial 105oC,Extra Low Impedance Aluminum Electrolytic Capacitor
CD265 Radial 125oC,1000 Hours Aluminum Electrolytic Capacitor
CD269 Radial 125oC,2000 Hours Aluminum Electrolytic Capacitor
CD117 Radial Low Leakage Current Aluminum Electrolytic Capacitor
CD117H Radial Low Leakage Current Aluminum Electrolytic Capacitor
CD71A Radial For Speaker Network Aluminum Electrolytic Capacitor
CD71S Radial For Horizontal Deflection Aluminum Electrolytic Capacitor
CD11A Radial For Hi-Fi audio Aluminum Electrolytic Capacitor
CD171 Radial For Photo Flash Aluminum Electrolytic Capacitor

Snap-In Aluminum Electrolytic Capacitor

Elecsound can offer Snap-in, large size type of Aluminum Electrolytic Capacitor . pls check carefully for below series:
CD291 Snap-In  General, Miniaturized 
CD292 Snap-In  General, Miniaturized 
CD293 Snap-In  General, Miniaturized 
CD295 Snap-In General, Miniaturized,    Longlife 
CD294 Snap-In 105oC,Miniaturized     
CD296 Snap-In 105oC,Miniaturized,Longlife 
CD297 Snap-In 105oC,Miniaturized,Longlife     
CD29S Snap-In 105oC,Laminated Case Series 
CD299 Snap-In 105oC,High Ripple Current,Longlife 
CD13 Lug General, Miniaturized     
CD17 Lug For Photo Flash 
CDIN Lug For Air Conditioner 
CDPC Lug,Snap-In For P.F.C Circuit    
CD135 Screw General, Miniaturized 
CD136 Screw 105oC,Longlife 
CD138 Screw Gerneral,Longlife 
CD135X Screw Miniaturized 
CD137 Screw Long life for inverter 
CD139 Screw 105oC,For inverter 
CD13L Screw Extra long life for inverter 
CD60 Lug For Motor Starting

Aluminum Electrolytic Capacitor

Elecsound can offer Snap-in, large size type of Aluminum Electrolytic Capacitor . pls check carefully for below series:
CD291 Snap-In  General, Miniaturized 
CD292 Snap-In  General, Miniaturized 
CD293 Snap-In  General, Miniaturized 
CD295 Snap-In General, Miniaturized,    Longlife 
CD294 Snap-In 105oC,Miniaturized     
CD296 Snap-In 105oC,Miniaturized,Longlife 
CD297 Snap-In 105oC,Miniaturized,Longlife     
CD29S Snap-In 105oC,Laminated Case Series 
CD299 Snap-In 105oC,High Ripple Current,Longlife 
CD13 Lug General, Miniaturized
CD17 Lug For Photo Flash 
CDIN Lug For Air Conditioner 
CDPC Lug,Snap-In For P.F.C Circuit    
CD135 Screw General, Miniaturized 
CD136 Screw 105oC,Longlife 
CD138 Screw Gerneral,Longlife 
CD135X Screw Miniaturized 
CD137 Screw Long life for inverter 
CD139 Screw 105oC,For inverter 
CD13L Screw Extra long life for inverter 
CD60 Lug For Motor Starting

Snap-In, large size of Aluminum Electrolytic Capacitor

Elecsound can offer Snap-in, large size type of Aluminum Electrolytic Capacitor . pls check carefully for below series:
CD291 Snap-In  General, Miniaturized 
CD292 Snap-In  General, Miniaturized 
CD293 Snap-In  General, Miniaturized 
CD295 Snap-In General, Miniaturized,    Longlife 
CD294 Snap-In 105oC,Miniaturized 
CD296 Snap-In 105oC,Miniaturized,Longlife 
CD297 Snap-In 105oC,Miniaturized,Longlife
CD29S Snap-In 105oC,Laminated Case Series 
CD299 Snap-In 105oC,High Ripple Current,Longlife 
CD13 Lug General, Miniaturized
CD17 Lug For Photo Flash 
CDIN Lug For Air Conditioner 
CDPC Lug,Snap-In For P.F.C Circuit
CD135 Screw General, Miniaturized 
CD136 Screw 105oC,Longlife
CD138 Screw Gerneral,Longlife 
CD135X Screw Miniaturized 
CD137 Screw Long life for inverter 
CD139 Screw 105oC,For inverter 
CD13L Screw Extra long life for inverter 
CD60 Lug For Motor Starting 

Aluminum-Electrolytic-Capacitors

Elecsound can offer almost all kinds of chip Aluminum Electrolytic Capacitor . our products are very high quality as Japan brand but much low prices than Japan brand. if you need pls check below info:
SS Standard 85C SMD Aluminum Electrolytic Capacitor
SC Low leakage current  SMD Aluminum Electrolytic Capacitor
HT  Wide temperature 105C SMD Aluminum Electrolytic Capacitor
NP Non-polarized SMD Aluminum Electrolytic Capacitor
KP Non-polarized with wide temperature SMD Aluminum Electrolytic Capacitor
LZ Low impedance SMD Aluminum Electrolytic Capacitor
KZ Extra lower impedance SMD Aluminum Electrolytic Capacitor
FZ Long life extra impedance SMD Aluminum Electrolytic Capacitor
EL Long life assurance SMD Aluminum Electrolytic Capacitor
KL 5000 hours load life SMD Aluminum Electrolytic Capacitor
KH  High reliability SMD Aluminum Electrolytic Capacitor

Aluminium-Electrolytic-Capacitors

The aluminium electrolytic capacitor consists of two foils interleaved with an absorbent paper, and wound tightly into a cylinder. The positive foil, or anode, is made from pure aluminium foil on the surface of which aluminium oxide dielectric has been formed electrolytically. The foil has been etched to increase the effective surface area, and the area of the anode is typically 30–100 times larger than the plan area of the foil.
The other plate is a combination of high-absorption paper impregnated with an electrolyte, in contact with a cathode foil. The electrolyte is there to make good contact with the anode, by permeating its etched structure, and also to repair any flaws in the oxide layer when the capacitor is polarised. The function of the aluminium cathode foil is to reduce the series resistance of the capacitor by making contact with the paper over a wide area.
The cathode foil itself has a thin oxide film, and is typically etched to increase the surface area slightly. You may have worked out this gives some capacitance between foil and electrolyte, so that the overall capacitance is that of the anode plus that of the cathode in series. You will be right to think that, but in practice the cathode film is very thin and its capacitance consequently very high.
The anode and cathode foils are interleaved with paper and wound into a cylinder as shown in Figure 2. During the winding process, aluminium tabs are attached to each foil to provide electrical contact. In large capacitors, the next process would be to add the terminal deck, complete with terminals, which are attached to the tabs before the deck is folded down to rest on top of the winding.
The complete winding is then impregnated with an electrolyte, before being housed in a suitable container, usually an aluminium can, and sealed. Before being sleeved and packed, capacitors are first aged. The purpose of this stage is to repair any damage in the oxide layer, and thus reduce the leakage current to very low levels. Damage to the oxide layer can occur due to slitting of the anode foil after forming, attaching the tabs to the anode foil, or minor mechanical damage caused during winding. Normally carried out at the rated top temperature to the capacitor, ageing applies voltage to the device through a current-limited supply, a process that may take several hours to complete.
We have mentioned the ‘electrolyte’, and this is important, because the choice of electrolyte determines some of the capacitor characteristics. For example, a mixture based on ethylene glycol and water will freeze at very low temperatures. Such ‘wet’ capacitors must be operated upright and tend to have lower operating voltages. A number of similar electrolytes are to be found, many of which have a ‘gel’ consistency. So-called ‘dry’ electrolytic capacitors use electrolytes such as manganese oxide, but tend to have lower volumetric efficiency.
The original aluminium electrolytic construction produces a capacitor with radial leads for through-hole insertion. This style is made in volume and very cost-effective: you will find many circuits that use small radial electrolytic capacitors, either self-supported or with additional mechanical strengthening provided by a dispensed silicone rubber surround/underfill. For power supplies and similar applications demanding high values of capacitance, the components are large and heavy, and will be fixed by a clamp or tie wrap around the body.
Increasingly, parts are modified with tabs underneath for surface mounting, although large value parts still have the disadvantage of a relatively high ‘profile’ above the board. This is significant not only because of the space taken up, but also because lateral forces on the body (due for example to vibration) result in high stress on the solder joints. Components have thus been developed with four tabs (instead of two).
Other types have the chip-type format shown in Figure 3, where the body is encapsulated in plastic, but these are generally more expensive. Attempts have also been made to produce a ‘solid aluminium’ electrolytic capacitor similar to the tantalum part, but these have not been successfully implemented.

Electrolytic-capacitors

Electrolytic capacitors are capacitors in which one or both of the “plates” is a non-metallic conductive substance, an electrolyte. Electrolytes have lower conductivity than metals, so are only used in capacitors when metallic plate is not practical, such as when the dielectric surface is fragile or rough in shape or when ionic current is required to maintain the dielectric integrity. The dielectric material of electrolytic capacitors is produced from the anode metal itself in what is known as the forming (or anodizing process. During this process, current flows from the anode metal – which must be a valve metal such as aluminum, niobium, tantalum, titanium, or silicon – through a conductive bath of a special forming electrolyte to the bath cathode. The flow of current causes an insulating metal oxide to grow out of and into the surface of the anode. The thickness, structure and composition of this insulating layer determine its dielectric strength. The applied potential between the anode metal and the bath cathode must be above the oxide breakdown voltage before significant current will flow. As current flows, the breakdown strength (formed voltage) and oxide thickness increase. See Figure 2 for a comparison of the electrostatic (classical) and electrolytic capacitors. The “electrolytic capacitors” are quite different from, and not to be confused with the “electrochemical capacitors” (also called ultracapacitors) the operation of which is based on the electrical double layer capacitance.
The electrolysis reaction was investigated by Michael Faraday in the 1700′s. A relationship between the charge flow through the system and the amount of product (in this case, metallic oxide) was found to exist. Faraday noted the relationship between gram-equivalents of product and charge transfer for all ideal (stoichiometric) electrolysis reactions in what is now known as Faraday’s Law. Departures from this relationship exist for the process of oxide formation on anode metals, since some oxide can be grown chemically and thermally to reduce the electrical energy requirements in the formation process, which can cost several dollars per kilogram of anode produced. Also there can be some undesirable side reactions during the formation process which do not contribute to oxide formation. In the formation process, brittle metallic oxide is grown upon the metal foil, which is usually rough in shape. The anode metal is therefore in intimate contact with one side of the oxide dielectric. The electrolyte is used to make contact between the other side of the oxide and the cathode plate.
The advantage of electrolytic capacitors is the high capacitance per unit volume and per unit cost. The high capacitance arises from the high dielectric constant, the high breakdown field strength, the rough surface, and the extremely small, uniform thickness of the anodically formed metallic oxide. The reason that electrolytic capacitors have such uniform dielectric stress and can operate at such high field strength, within 80% of their breakdown strength, on the order of 1,000 volts/µm, is due to two reasons. First, the original anodization (“formation”) process is performed at a fixed voltage, and the dielectric grows everywhere to whatever thickness is required to support that voltage. Second, once the foil is in a capacitor, the capacitor “fill” electrolyte continues the healing work of the original forming electrolyte, repairing and thickening the dielectric locally as required. This healing process is driven by the capacitor’s dc leakage current, which is drawn whenever a dc voltage is applied to the capacitor, that is, whenever it is in operation. In fact, electrolytic capacitors often last longer when they are in continuous, mild use that when they are only charged up briefly every year or decade.
The disadvantage of electrolytic capacitors is the non-ideal, lossy characteristics which arise from the semiconductive oxide properties, double-layer effects from the electrolyte-oxide charge-space region, resistive losses from the high electrolyte resistivity, frequency response rolloff due to the roughness of the surface oxide, and finite capacitor life due to breakdown and degradation of the electrolyte. Some of these considerations will be discussed below in more detail from the standpoint of the aluminum electrolytic capacitor.
Also, the anodic oxide dielectric is polar, and so are the electrolytic capacitors (in contrast with the classical, electrostatic capacitors), that is the capacitors must be connected with the correct polarity as marked. Connecting with reverse voltage injects hydrogen ions through the oxide readily, causing high electrical conduction, heating and reduction of the anodic oxide film. Non-polar (or bi-polar) devices can be made by using two anodes instead of an anode and a cathode, or one could connect the positives or negatives of two identical device together, then the other two terminals would form a non-polar device.
Most electrolytic capacitors are constructed using aluminum electrodes, but tantalum and niobium is also used. Aluminum anode is the least expensive at $0.04 per gram. As such, it is used in large (even greater than one liter!) and small (tiny surface-mount) capacitors. Tantalum anode material is over $2.00 per gram but offers high stability, more capacitance (four times that of aluminum), lower resistance (up to 90% lower) per size. It is available as small units (typically less than 5 cm3) and surface mount. Niobium anodic powder is less than $1.00 per gram, much cheaper and more available than tantalum but still much more expensive than aluminum. Capacitance is much more than aluminum, nearly that of tantalum. It is a much newer technology than tantalum.
H.O. Siegmund invented the electrolytic capacitor in 1921. Julius Lilienfeld did much to develop electrolytic theory in the 1920′s and 1930′s. Cornell Dubilier was at this time the world’s largest capacitor company, and did much to develop the technology of etching and anodizing.

SMD-Aluminum-Electrolytic-Capacitor

We are strong in capacitor and if you try us, you will not regret. So any inquiry, pls feel free to contact me. I will try my best to satisfy you. Here are our SMD Aluminum Electrolytic Capacitor. Pls check. Thanks!

Snap-In-large-size-of-Aluminum-Electrolytic-Capacitor

Elecsound can offer Snap-in, large size type of Aluminum Electrolytic Capacitor . pls check carefully for below series:
CD291 Snap-In  General, Miniaturized 
CD292 Snap-In  General, Miniaturized 
CD293 Snap-In  General, Miniaturized 
CD295 Snap-In General, Miniaturized,    Longlife 
CD294 Snap-In 105oC,Miniaturized     
CD296 Snap-In 105oC,Miniaturized,Longlife 
CD297 Snap-In 105oC,Miniaturized,Longlife     
CD29S Snap-In 105oC,Laminated Case Series 
CD299 Snap-In 105oC,High Ripple Current,Longlife 
CD13 Lug General, Miniaturized     
CD17 Lug For Photo Flash 
CDIN Lug For Air Conditioner 
CDPC Lug,Snap-In For P.F.C Circuit    
CD135 Screw General, Miniaturized 
CD136 Screw 105oC,Longlife 
CD138 Screw Gerneral,Longlife 
CD135X Screw Miniaturized 
CD137 Screw Long life for inverter 
CD139 Screw 105oC,For inverter 
CD13L Screw Extra long life for inverter 
CD60 Lug For Motor Starting

Aluminium-Electrolytic-Capacitors

The aluminium electrolytic capacitor consists of two foils interleaved with an absorbent paper, and wound tightly into a cylinder. The positive foil, or anode, is made from pure aluminium foil on the surface of which aluminium oxide dielectric has been formed electrolytically. The foil has been etched to increase the effective surface area, and the area of the anode is typically 30–100 times larger than the plan area of the foil.
The other plate is a combination of high-absorption paper impregnated with an electrolyte, in contact with a cathode foil. The electrolyte is there to make good contact with the anode, by permeating its etched structure, and also to repair any flaws in the oxide layer when the capacitor is polarised. The function of the aluminium cathode foil is to reduce the series resistance of the capacitor by making contact with the paper over a wide area.
The cathode foil itself has a thin oxide film, and is typically etched to increase the surface area slightly. You may have worked out this gives some capacitance between foil and electrolyte, so that the overall capacitance is that of the anode plus that of the cathode in series. You will be right to think that, but in practice the cathode film is very thin and its capacitance consequently very high.
The anode and cathode foils are interleaved with paper and wound into a cylinder as shown in Figure 2. During the winding process, aluminium tabs are attached to each foil to provide electrical contact. In large capacitors, the next process would be to add the terminal deck, complete with terminals, which are attached to the tabs before the deck is folded down to rest on top of the winding.
The complete winding is then impregnated with an electrolyte, before being housed in a suitable container, usually an aluminium can, and sealed. Before being sleeved and packed, capacitors are first aged. The purpose of this stage is to repair any damage in the oxide layer, and thus reduce the leakage current to very low levels. Damage to the oxide layer can occur due to slitting of the anode foil after forming, attaching the tabs to the anode foil, or minor mechanical damage caused during winding. Normally carried out at the rated top temperature to the capacitor, ageing applies voltage to the device through a current-limited supply, a process that may take several hours to complete.
We have mentioned the ‘electrolyte’, and this is important, because the choice of electrolyte determines some of the capacitor characteristics. For example, a mixture based on ethylene glycol and water will freeze at very low temperatures. Such ‘wet’ capacitors must be operated upright and tend to have lower operating voltages. A number of similar electrolytes are to be found, many of which have a ‘gel’ consistency. So-called ‘dry’ electrolytic capacitors use electrolytes such as manganese oxide, but tend to have lower volumetric efficiency.
The original aluminium electrolytic construction produces a capacitor with radial leads for through-hole insertion. This style is made in volume and very cost-effective: you will find many circuits that use small radial electrolytic capacitors, either self-supported or with additional mechanical strengthening provided by a dispensed silicone rubber surround/underfill. For power supplies and similar applications demanding high values of capacitance, the components are large and heavy, and will be fixed by a clamp or tie wrap around the body.
Increasingly, parts are modified with tabs underneath for surface mounting, although large value parts still have the disadvantage of a relatively high ‘profile’ above the board. This is significant not only because of the space taken up, but also because lateral forces on the body (due for example to vibration) result in high stress on the solder joints. Components have thus been developed with four tabs (instead of two).
Other types have the chip-type format shown in Figure 3, where the body is encapsulated in plastic, but these are generally more expensive. Attempts have also been made to produce a ‘solid aluminium’ electrolytic capacitor similar to the tantalum part, but these have not been successfully implemented.

«123»

Powered By Z-Blog 2.3 Avengers Build 180518

1996-2018 © Copyright Elecsound Technology Co,. Ltd All Rights Reserved