
Aluminum Electrolytic Capacitors
Aluminum electrolytic capacitors are divided into three subfamilies by the type of electrolyte:
- non-solid (liquid, wet) aluminum electrolytic capacitors,
- solid manganese dioxide aluminum electrolytic capacitors,
- solid polymer aluminum electrolytic capacitors.
Aluminum electrolytic capacitors (electrolytic) are widely used in power supply applications requiring high capacitance in energy-dense, small-volume packages having very low equivalent series resistance (ESR).
The aluminum electrolytic capacitors series has become a hot product of Leaguer Capacitor provides diversified choices for customers. Electrolytic capacitor is available in a wide range of types and styles, in good quality and in reasonable price. Leaguer Capacitor runs the business in good faith and strives to provide professional services for customers.
Table Of Contents For This Page
It is not easy to introduce all aspects of Aluminum Electrolytic Capacitors, so we have prepared a lot of information on this page for you to delve into. To make sure you can find the information you want quickly, we have prepared this content directory that will jump to the corresponding location when you click on it.
Industrial Applications Of Our Aluminum Electrolytic Capacitors
Capacitor manufacturers “LEAGUER” with over 20 years of experience, high quality Aluminum Electrolytic Capacitors with excellent ripple current, extended life, low ESR, high reliability for Automotive, Telecommunication, Cloud Computing, Renewable Energy, Industrial Electronics, Consumer Electronics.
General Hot Selling Products
Our products include Polymer Hybrid Capacitor, Polymer Solid Capacitors, SMD Electrolytic Capacitor, Snap-in Electrolytic Capacitors, Screw Terminal Electrolytic Capacitors, Radial Lead Electrolytic Capacitors.

Aluminum Electrolytic Capacitors
- SMD Electrolytic Capacitor
- Radial Lead Electrolytic Capacitors
- Snap-in Electrolytic Capacitors
- Screw Terminal Electrolytic Capacitors

Conductive Polymer Aluminum Solid Capacitors
- SMD Polymer Solid Capacitor
- Radial Lead Polymer Solid Capacitor

Conductive Polymer Hybrid Aluminum Electrolytic Capacitors
- SMD Polymer Hybrid Capacitor
- Radial Lead Polymer Hybrid Capacitor
Wanna dig deeper in Aluminum Electrolytic Capacitors?
The Process Flow & Main Materials
This is a process for rolling a set of anode and cathode foils into a cylindrical form with a paper separator inserted between them. During this process, an inner terminal (called a tab) is attached to each of the aluminum foils. The roll made at this process is called a capacitor element.
Step 1: Etching (Enlargement of the Surface Area)
Main Materials:
High purity aluminum foil
Chloride
Pure water

Step 2: Forming (Formation of the Dielectric)
Main Materials:
Etched foil
Borate, etc.
Pure water

Step 3: Slitting
Main Materials:
Anode foil
Cathode foil
Electrolytic paper

Step 4: Stitching
Main Materials:
Slited foils (anode/cathode)
Electrolytic paper
Conductive pins
Winding aftixing material

Step 5: Winding
Main Materials:
Slited foils (anode/cathode)
Electrolytic paper
Conductive pins
Winding aftixing material

Step 6: Wear Rubber Plug
Main Materials:
Elements
Rubber Plug

Step 7: Element Impregnation Electrolyte
Main Materials:
Elements
Electrolyte

Step 8: Assembly & Finishing
Main Materials:
Impregnated elements
Aluminum case
Rubber plug
Exterior housing material (Sleeving, base plate, etc.)

Step 9: Cleaning
Main Materials:
Semi-finished capacitors
Finished capacitors

Step 10: Aging
Main Materials:
Assembled products

Step 11: Selection
Main Materials:
Assembled products

Step 12: Appearance Inspection
Main Materials:
Finished capacitors
Tools

Step 13: Processing (Base installation (Printing/Braiding); Taping material/Cut forming)
Main Materials:
Plastic platform
Taping material
Accessories

Step 14: Appearance Inspection
Main Materials:
Finished capacitors
Tools

Step 15: Packaging
Main Materials:
Box
Carton
Accessories

Step 16: Delivery & Shipping
Main Materials:
By air
By ocean

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The Electrical Parameters About Aluminum Electrolytic Capacitors
When we talk about aluminum electrolytic capacitors, we generally talk about these parameter requirements, such as:
Capacitance standard values and tolerances
Rated and category voltage
Surge voltage
Transient voltage
Reverse voltage
Impedance
ESR and dissipation factor tan δ
Ripple current
Charge/discharge stability
Current surge, peak or pulse current
Leakage current
Why Choose Leaguer?
Zhuhai Leaguer Capacitor Co., Ltd. was founded in 2002 (stock code: 873198), specializing in the design, research, manufacture and sales of all series of Aluminum Electrolytic Capacitors.
With the technical support of Tsinghua University Research Institute and established Aluminum Electrolytic Capacitor Engineering Technology Research Center of Guangdong province. The main products:
- Aluminum Electrolytic Capacitors
- Conductive Polymer Aluminum Solid Capacitors
- Conductive Polymer Hybrid Aluminum Electrolytic Capacitors
Dedicated to providing the capacitors with AEC-Q200 qualified for global power supplies!
The Application Guidelines About Aluminum Electrolytic Capacitors
When you use aluminum electrolytic capacitors, remember the following:
Electrodes
Aluminum electrolytic capacitors are bipolar electrodes. Polarity must thus be identified before using. If electrodes are reversed, there might be occurrences of leakage current or/and even luring short-circuit.
Voltage
Running voltages shall not exceed rated ones, otherwise, damages to capacitors may occur because of increase of internal temperature resulting from rising drain current. Summation of peak values of volts d. c. and ripping volts shall not be more than rated voltage.
Temperature
To be used within rated range of temperatures only, otherwise capacitors shall not work well as expected and may be under some potential damages, which may lure ineffectiveness of capacitors. Both of changes of external temperatures and the possible increases stemming from inbuilt chips and parts shall be all taken into consideration during use
Ripple current
To be used within range of permitted ripple current. Excessiveness of ripple current may lure heating of capacitors, increase of leakage current and then decrease using life.
Storage of capacitors
Stored in moisture-proof and shinning-proof environment with temperature ranging from 5~30℃, and relative humidity of under 60%RH. For favorable sealing performance, to keep capacitors in their original package of leaving factory, please and to use all unpacked up at most, any left with shall be wrapped in package again and sealed with tapes. Capacitors stored for one year-plus shall not be used until being died and one hour after they have been connected in series with resistance of 1KΩand handled by voltage gradually increased to persistent rated one.
Capacitor measurement
Excessive impact current resulted from charge and discharge hastily will cause increases of leakage current, or even short circuit. Therefore please contact a 1KΩprotective resistance in series to capacitors, and rise voltage gradually up to rated voltage during measuring leakage current. To measure other parameters shall not be done until capacitors have been fully discharged through connecting in series 1KΩ resistance.
Capacitors’ Installment
- Please make confirmation on the specification (rated static capacitance, voltage and the like ) and electrodes before installment;
- Deformed capacitors shall not be installed.
- Space between positive electrode and negative electrode shall be equal to that between holes existing in circuit board.
- Strength of manipulators of auto inserting machinery shall be proper.
- Soldering shall be carried out subject to specified statements( temperature, time and times).
- Do not immerse capacitors in melted solder solution .
- During soldering, capacitors shall not be contacted with any other toppled items.
- Improper strength shall not be exerted on down-leads and ends, and capacitors soldered on PC board shall not be moved.
- Besides, solder re-flow should not be granted more than twice.
Capacitors should be used apart from the following circumstances
- Contacting directly with water, salt or oil;
- Exposed to direct sunlight;
- High temperature or humid environments;
- Full of deleterious chemical gas fluid;
- Acidic or alkaline environments;
- Excessive vibrative and impactive circumstances.
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