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庫存編號 162-0356
製造零件編號UPW2V3R3MPD
BrandNichicon
HK$2.40
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3.3 µF Electrolytic 350 V dc Through Hole 10 (Dia.) x 16mm 16mm - - 10mm -40°C +105°C - 5mm 5000h
RS庫存編號 166-8077
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BrandPanasonic
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5600 µF Electrolytic 16 V dc Through Hole 16 (Dia.) x 35.5mm 35.5mm - - 16mm -55°C +105°C - 7.5mm 5000h
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製造零件編號UUD1C220MCL1GS
BrandNichicon
HK$5.471
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22 µF Electrolytic 16 V dc Surface Mount 5 (Dia.) x 5.8mm 5.8mm - - 5mm -55°C +105°C - - 2000h
RS庫存編號 501-9273
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22 µF Electrolytic 50 V dc Through Hole 8 (Dia.) x 7mm 7mm - - 8mm -55°C +105°C - 3.5mm 1000h
RS庫存編號 172-3122
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BrandMurata
HK$27.585
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330 µF Polymer 2 V dc Surface Mount 7.3 x 4.3 x 2.8mm 2.8mm 7.3mm 4.3mm - -40°C +105°C - - -
RS庫存編號 844-0908
製造零件編號UWZ1V151MCL1GS
BrandNichicon
HK$3.492
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150 µF Electrolytic 35 V dc Surface Mount 8 (Dia.) x 10mm 10mm - - 8mm -55°C +105°C - 3.1mm 1000h
RS庫存編號 170-1152
BrandRS PRO
HK$1.849
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3300 µF Electrolytic 6.3 V dc Through Hole 10 (Dia.) x 20mm 20mm 20mm - 10mm -40°C +105°C - 5mm 2000h
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製造零件編號A700V226M010ATE028
BrandKEMET
HK$6.695
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22 µF Polymer 10 V dc Surface Mount 7.3 x 4.3 x 2mm 2mm 7.3mm 4.3mm - -55°C +125°C - - 2000h
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2.2 µF Electrolytic 400 V dc Through Hole 10 (Dia.) x 12.5mm 12.5mm - - 10mm -40°C +105°C - 5mm 1000h
RS庫存編號 103-4770
製造零件編號EEEFTA331XAP
BrandPanasonic
HK$2.039
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330 µF Electrolytic 10 V dc Surface Mount 6.3 (Dia.) x 7.7mm 7.7mm - - 6.3mm -55°C +105°C - 1.8mm 2000h
RS庫存編號 839-5157
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47 µF Electrolytic 50 V dc Surface Mount 10.5 (Dia.) x 9.85mm 9.85mm - - 10.5mm -40°C +85°C - 4.5mm 2000h
RS庫存編號 381-9784
製造零件編號ALS31A471DF450
BrandKEMET
HK$147.17
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470 µF Electrolytic 450 V dc Screw Mount 36 x 105mm 105mm 105mm - 36mm -40°C +85°C - - 11000 h @ +85 °C/450V dc/Ir, 22000 h @ +85 °C/450V dc
RS庫存編號 169-3595
製造零件編號NRSZ102M25V12.5X20F
HK$5.241
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1000 µF Electrolytic 25 V dc Through Hole 12.5 (Dia.) x 20mm 20mm - - 12.5mm -55°C +105°C - 5mm 7000h
RS庫存編號 862-4180
製造零件編號UVY1J680MPD
BrandNichicon
HK$4.40
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68 µF Electrolytic 63 V dc Through Hole 8 x 11.5mm 11.5mm - - 8mm -55°C +105°C - 3.5mm 1000h
RS庫存編號 365-4745
製造零件編號ECA2GHG4R7
BrandPanasonic
HK$6.016
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RS庫存編號 163-5717
製造零件編號865080443008
HK$1.277
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56 µF Electrolytic 25 V dc Surface Mount 6.3 (Dia.) x 5.35mm 5.35mm - - 6.3mm -55°C +105°C - 2.2mm 2000h
RS庫存編號 145-0351
製造零件編號EKMH500VSN472MP45S
HK$44.305
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4700 µF Electrolytic 50 V dc Snap-In 23 (Dia.) x 45mm 45mm - - 23mm -40°C +105°C - 10mm 2000h
RS庫存編號 173-5176
製造零件編號ALS60A222MP550
BrandKEMET
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2200 µF Electrolytic 550 V dc Screw Mount 66 x 146mm 146mm 146mm - 66mm -40°C +85°C - 28.5mm 19000 h @ +85 °C/550V dc/Ir, 38000 h @ +85 °C/550V dc
RS庫存編號 163-7080
製造零件編號865080253011
HK$2.482
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330 µF Electrolytic 10 V dc Surface Mount 8 (Dia.) x 10.35mm 10.35mm - - 8mm -55°C +105°C - 3.1mm 2000h
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製造零件編號16PX1000MEFC10X12.5
BrandRubycon
HK$1.759
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1000 µF Electrolytic 16 V dc Through Hole 10 x 12.5mm 12.5mm - - 10mm -55°C +105°C - 5mm 2000h