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. 711-1110
BrandRS PRO
SGD0.197
Each (In a Pack of 25)
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470µF Electrolytic 25V dc Through Hole 8 (Dia.) x 14mm 14mm 14mm - 8mm -40°C +105°C - 3.5mm 2000h
RS Stock No. 170-1196
BrandRS PRO
SGD0.147
Each (In a Bag of 1000)
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470µF Electrolytic 25V dc Through Hole 8 (Dia.) x 14mm 14mm 14mm - 8mm -40°C +105°C - 3.5mm 2000h
RS Stock No. 706-3314
BrandRS PRO
SGD3.73
Each
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220µF Electrolytic 400V dc Through Hole 25 (Dia.) x 45mm 45mm 45mm - 25mm -25°C +105°C - 10mm 2000h
RS Stock No. 173-0289
BrandRS PRO
SGD6.445
Each (In a Bag of 100)
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220µF Electrolytic 400V dc Through Hole 25 (Dia.) x 45mm 45mm 45mm - 25mm -25°C +105°C - 10mm 2000h
RS Stock No. 711-1441
BrandRS PRO
SGD0.19
Each (In a Pack of 50)
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100µF Electrolytic 50V dc Through Hole 8 (Dia.) x 11mm 11mm 11mm - 8mm -40°C +105°C - 3.5mm 2000h
RS Stock No. 170-1117
BrandRS PRO
SGD3.955
Each (In a Bag of 50)
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100µF Electrolytic 250V dc Through Hole 18 (Dia.) x 36mm 36mm 36mm - 18mm -25°C +105°C - - 1000h
RS Stock No. 170-1248
BrandRS PRO
SGD0.127
Each (In a Bag of 1000)
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100µF Electrolytic 50V dc Through Hole 8 (Dia.) x 11mm 11mm 11mm - 8mm -40°C +105°C - 3.5mm 2000h
RS Stock No. 707-6568
BrandRS PRO
SGD5.28
Each (In a Pack of 2)
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100µF Electrolytic 250V dc Through Hole 18 (Dia.) x 36mm 36mm 36mm - 18mm -25°C +105°C - - 1000h
RS Stock No. 731-5264
BrandRS PRO
SGD3.785
Each (In a Bag of 2)
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150µF Electrolytic 400V dc Through Hole 25 (Dia.) x 35mm 35mm 35mm - 25mm -25°C +105°C - 10mm 2000h
RS Stock No. 173-0279
BrandRS PRO
SGD1.392
Each (In a Bag of 200)
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47µF Electrolytic 450V dc Through Hole 16 (Dia.) x 26mm 26mm 26mm - 16mm -25°C +105°C - 7.5mm 2000h
RS Stock No. 711-2141
BrandRS PRO
SGD2.315
Each (In a Pack of 2)
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47µF Electrolytic 450V dc Through Hole 16 (Dia.) x 26mm 26mm 26mm - 16mm -25°C +105°C - 7.5mm 2000h
RS Stock No. 170-1180
BrandRS PRO
SGD0.36
Each (In a Bag of 500)
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2200µF Electrolytic 16V dc Through Hole 10 (Dia.) x 20mm 20mm 20mm - 10mm -40°C +105°C - 5mm 2000h
RS Stock No. 711-1006
BrandRS PRO
SGD0.531
Each (In a Pack of 10)
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2200µF Electrolytic 16V dc Through Hole 10 (Dia.) x 20mm 20mm 20mm - 10mm -40°C +105°C - 5mm 2000h
RS Stock No. 707-5663
BrandRS PRO
SGD0.068
Each (In a Pack of 200)
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1µF Electrolytic 50V dc Through Hole 4 (Dia.) x 7mm 7mm 7mm - 4mm -40°C +105°C - 1.5mm 1000h
RS Stock No. 170-1045
BrandRS PRO
SGD0.037
Each (In a Bag of 2000)
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1µF Electrolytic 50V dc Through Hole 4 (Dia.) x 7mm 7mm 7mm - 4mm -40°C +105°C - 1.5mm 1000h
RS Stock No. 707-6506
BrandRS PRO
SGD0.541
Each (In a Pack of 25)
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47µF Electrolytic 35V dc Through Hole 6 (Dia.) x 13mm 13mm 13mm - 6mm -40°C +105°C - - 1000h
RS Stock No. 706-3308
BrandRS PRO
SGD4.37
Each
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150µF Electrolytic 450V dc Through Hole 22 (Dia.) x 50mm 50mm 50mm - 22mm -25°C +105°C - 10mm 2000h
RS Stock No. 711-1444
BrandRS PRO
SGD0.136
Each (In a Pack of 50)
units
47µF Electrolytic 50V dc Through Hole 6.3 (Dia.) x 11mm 11mm 11mm - 6.3mm -40°C +105°C - 2.5mm 1000h
RS Stock No. 173-0278
BrandRS PRO
SGD1.392
Each (In a Bag of 100)
units
68µF Electrolytic 400V dc Through Hole 16 (Dia.) x 31mm 31mm 31mm - 16mm -25°C +105°C - 7.5mm 2000h
RS Stock No. 170-1249
BrandRS PRO
SGD0.073
Each (In a Bag of 1000)
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47µF Electrolytic 50V dc Through Hole 6.3 (Dia.) x 11mm 11mm 11mm - 6.3mm -40°C +105°C - 2.5mm 1000h
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