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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RS Stock No. 170-1196
BrandRS PRO
SGD0.152
Each (In a Bag of 1000)
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470 µF Electrolytic 25 V dc Through Hole 8 (Dia.) x 14mm 14mm 14mm - 8mm -40°C +105°C - 3.5mm 2000h
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BrandRS PRO
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Each (In a Pack of 25)
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470 µF Electrolytic 25 V dc Through Hole 8 (Dia.) x 14mm 14mm 14mm - 8mm -40°C +105°C - 3.5mm 2000h
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Mfr. Part No.LNR1H153MSE
BrandNichicon
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15000 µF Electrolytic 50 V dc Screw Mount 35 x 80mm 80mm - - 35mm -40°C +85°C - 12.7mm 5000h
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Mfr. Part No.A750MS108M1CAAE013
BrandKEMET
SGD1.208
Each (In a Pack of 5)
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1000 µF Polymer 16 V dc Through Hole 10 (Dia.) x 12mm - - 12mm 10mm -55°C +105°C - 5mm 2000h
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Mfr. Part No.A750MS108M1CAAE013
BrandKEMET
SGD0.648
Each (In a Bag of 250)
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1000 µF Polymer 16 V dc Through Hole 10 (Dia.) x 12mm - - 12mm 10mm -55°C +105°C - 5mm 2000h
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Mfr. Part No.35YXF47M6.3X11
BrandRubycon
SGD0.134
Each (In a Box of 2000)
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47 µF Electrolytic 35 V dc Through Hole 6.3 (Dia.) x 11mm 11mm - - 6.3mm -40°C +105°C - 2.5mm 5000h
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Mfr. Part No.35YXF47M6.3X11
BrandRubycon
SGD0.456
Each (In a Pack of 5)
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47 µF Electrolytic 35 V dc Through Hole 6.3 (Dia.) x 11mm 11mm - - 6.3mm -40°C +105°C - 2.5mm 5000h
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BrandNichicon
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Each (In a Pack of 5)
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Mfr. Part No.EEUFM1E102
BrandPanasonic
SGD0.752
Each (In a Bag of 100)
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1000 µF Electrolytic 25 V dc Through Hole 12.5 (Dia.) x 20mm 20mm - - 12.5mm -40°C +105°C - 5mm 5000h
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Mfr. Part No.EEUFM1E102
BrandPanasonic
SGD1.366
Each (In a Pack of 5)
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1000 µF Electrolytic 25 V dc Through Hole 12.5 (Dia.) x 20mm 20mm - - 12.5mm -40°C +105°C - 5mm 5000h
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Mfr. Part No.EEEHA1H4R7R
BrandPanasonic
SGD0.22
Each (In a Pack of 25)
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Mfr. Part No.EEEHA1H4R7R
BrandPanasonic
SGD0.12
Each (On a Reel of 1000)
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4.7 µF Electrolytic 50 V dc Surface Mount 5 (Dia.) x 5.4mm 5.4mm - - 5mm -40°C +105°C - 1.5mm 1000h
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Mfr. Part No.UVZ1H4R7MDD
BrandNichicon
SGD0.213
Each (In a Pack of 50)
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Mfr. Part No.UVZ1H4R7MDD
BrandNichicon
SGD0.153
Each (In a Box of 200)
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4.7 µF Electrolytic 50 V dc Through Hole 5 (Dia.) x 11mm 11mm - - 5mm -55°C +105°C - 2mm 1000h
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Mfr. Part No.ALP22A223DD040
BrandKEMET
SGD19.59
Each
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22000 µF Electrolytic 40 V dc Through Hole 40 x 55mm - 55mm - 40mm -40°C +85°C - - 26000 h @ +85 °C/40V dc/Ir
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BrandKEMET
SGD18.821
Each (In a Bag of 36)
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BrandPanasonic
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BrandKEMET
SGD6.54
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47 µF Electrolytic 63 V dc Through Hole 10 x 29mm - 29mm - 10mm -40°C +125°C - - 8000 h @ +125 °C/Ir
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BrandKEMET
SGD4.536
Each (In a Bag of 200)
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47 µF Electrolytic 63 V dc Through Hole 10 x 29mm - 29mm - 10mm -40°C +125°C - - 8000 h @ +125 °C/Ir