Aluminium Capacitors

Aluminium capacitors are a type of electrolytic capacitor. A capacitor is a two-terminal electrical component that can store energy, somewhat like a battery. Aluminium capacitors are polarised, meaning that the energy can only flow in a single direction. High purity grade Aluminium is used to create the anode foil and the cathode foil upon which electrolysis is applied to form an extremely thin insulating layer of aluminium oxide, which acts as the dielectric of the capacitor. Aluminium capacitors are found in many applications such as power supplies, computer motherboards and domestic appliances.

Dependent on the nature of the Electrolyte, capacitors may also be referred to as “wet” meaning they have a liquid electrolyte or solid. Solid Electrolytes may be hybridized with Aluminium but normally refers to Polymer or Tantalum based capacitors


Types of Aluminium Capacitors


Aluminium Electrolytic Capacitors


Electrolytic capacitors consist of an electrolyte which is a liquid or gel that consists of a large concentration of ions, and when voltage is applied across its terminals, it leads to charges being stored on the anode and cathode foils. The electric charge that can be stored by the capacitor is measured in Farads but usually in the range from nanofarads to millifarads. .Aluminium capacitors are used where high capacitance values to provide smoothing and filtering functions in the circuit. Commonly used in DC Power supplies due to their large capacitance and their compact size which helps to reduce the ripple voltage. Aluminium Electrolytic capacitors have reasonable Equivalent Series Resistance (ESR) but have the lowest leakage current from all capacitor types.


Polymer Electrolytic Capacitors


Polymer capacitors (also are known as polymer electrolytic capacitors or polymer e caps) have conductive polymer as their electrolyte material within a layered aluminium design. These capacitors combine unique properties from the polymer material in terms of high conductivity, extended temperature range and no risk of drying out – to make a capacitor that offers large capacitance and very low ESR (equivalent series resistance) with high ripple current capability and offer a longer operating life. Polymer capacitors offer a lot of package options between 2.2 to 470 microfarad


Hybrid Capacitors


Hybrid capacitors (polymer hybrid aluminium capacitors) are a mix of wet electrolyte and solid polymer. In this sense, they combine the best of both electrolytes. These capacitors offer high endurance, low ESR, and a high tolerance for ripple current. Hybrid capacitors also feature stable electric characteristics at high frequencies whilst maintaining reliability. The liquid electrolyte keeps the Leakage current very low and also allows self-repairing of the aluminium foils which prevent a drop in capacitance.


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Description Price Capacitance Technology Voltage Mounting Type Dimensions Height Length Depth Diameter Minimum Operating Temperature Maximum Operating Temperature Construction Lead Pitch Lifetime
RS Stock No. 711-1312
BrandRS PRO
£0.313
Each (In a Pack of 10)
Units
1000µF Electrolytic 35V dc Through Hole 10 (Dia.) x 20mm 20mm 20mm - 10mm -40°C +105°C - 5mm 2000h
RS Stock No. 711-1592
BrandRS PRO
£0.085
Each (In a Pack of 50)
Units
100µF Electrolytic 63V dc Through Hole 8 (Dia.) x 11mm 11mm 11mm - 8mm -40°C +105°C - 3.5mm 2000h
RS Stock No. 711-2103
BrandRS PRO
£0.044
Each (In a Pack of 25)
Units
1µF Electrolytic 450V dc Through Hole 8 (Dia.) x 11mm 11mm 11mm - 8mm -25°C +105°C - 3.5mm 2000h
RS Stock No. 173-0266
BrandRS PRO
£0.073
Each (In a Bag of 1000)
Units
1µF Electrolytic 450V dc Through Hole 8 (Dia.) x 11mm 11mm 11mm - 8mm -25°C +105°C - 3.5mm 2000h
RS Stock No. 711-1539
BrandRS PRO
£1.195
Each (In a Pack of 2)
Units
6800µF Electrolytic 50V dc Through Hole 25 (Dia.) x 44mm 44mm 44mm - 25mm -40°C +105°C - 12mm 2000h
RS Stock No. 711-1097
BrandRS PRO
£0.059
Each (In a Pack of 50)
Units
220µF Electrolytic 25V dc Through Hole 6 (Dia.) x 11mm 11mm 11mm - 6mm -40°C +105°C - 2.5mm 1000h
RS Stock No. 173-0285
BrandRS PRO
£1.937
Each (In a Bag of 1000)
Units
6800µF Electrolytic 50V dc Through Hole 25 (Dia.) x 44mm 44mm 44mm - 25mm -40°C +105°C - 12mm 2000h
RS Stock No. 170-1193
BrandRS PRO
£0.037
Each (In a Bag of 1000)
Units
220µF Electrolytic 25V dc Through Hole 6 (Dia.) x 11mm 11mm 11mm - 6mm -40°C +105°C - 2.5mm 1000h
RS Stock No. 170-1255
BrandRS PRO
£0.183
Each (In a Bag of 500)
Units
470µF Electrolytic 50V dc Through Hole 10 (Dia.) x 20mm 20mm 20mm - 10mm -40°C +105°C - 5mm 2000h
RS Stock No. 711-1475
BrandRS PRO
£0.316
Each (In a Pack of 10)
Units
470µF Electrolytic 50V dc Through Hole 10 (Dia.) x 20mm 20mm 20mm - 10mm -40°C +105°C - 5mm 2000h
RS Stock No. 170-1171
BrandRS PRO
£0.073
Each (In a Bag of 1000)
Units
470µF Electrolytic 16V dc Through Hole 8 (Dia.) x 11mm 11mm 11mm - 8mm -40°C +105°C - 3.5mm 2000h
RS Stock No. 170-1208
BrandRS PRO
£0.548
Each (In a Bag of 100)
Units
4700µF Electrolytic 25V dc Through Hole 16 (Dia.) x 31mm 31mm 31mm - 16mm -40°C +105°C - 7.5mm 2000h
RS Stock No. 711-1198
BrandRS PRO
£0.958
Each (In a Pack of 5)
Units
4700µF Electrolytic 25V dc Through Hole 16 (Dia.) x 31mm 31mm 31mm - 16mm -40°C +105°C - 7.5mm 2000h
RS Stock No. 711-0952
BrandRS PRO
£0.102
Each (In a Pack of 50)
Units
470µF Electrolytic 16V dc Through Hole 8 (Dia.) x 11mm 11mm 11mm - 8mm -40°C +105°C - 3.5mm 2000h
RS Stock No. 170-1143
BrandRS PRO
£1.645
Each (In a Bag of 50)
Units
2200µF Electrolytic 50V dc Through Hole 18 (Dia.) x 36mm 36mm 36mm - 18mm -40°C +105°C - - 1000h
RS Stock No. 707-6679
BrandRS PRO
£2.52
Each (In a Pack of 2)
Units
2200µF Electrolytic 50V dc Through Hole 18 (Dia.) x 36mm 36mm 36mm - 18mm -40°C +105°C - - 1000h
RS Stock No. 711-1292
BrandRS PRO
£0.207
Each (In a Pack of 25)
Units
470µF Electrolytic 35V dc Through Hole 10 (Dia.) x 15mm 15mm 15mm - 10mm -40°C +105°C - 5mm 2000h
RS Stock No. 711-1374
BrandRS PRO
£1.54
Each (In a Pack of 2)
Units
4700µF Electrolytic 35V dc Through Hole 18 (Dia.) x 36mm 36mm 36mm - 18mm -40°C +105°C - 7.5mm 2000h
RS Stock No. 170-1238
BrandRS PRO
£0.877
Each (In a Bag of 100)
Units
4700µF Electrolytic 35V dc Through Hole 18 (Dia.) x 36mm 36mm 36mm - 18mm -40°C +105°C - 7.5mm 2000h
RS Stock No. 170-1223
BrandRS PRO
£0.11
Each (In a Bag of 500)
Units
470µF Electrolytic 35V dc Through Hole 10 (Dia.) x 15mm 15mm 15mm - 10mm -40°C +105°C - 5mm 2000h
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