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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. For more information, please see our [guide to Aluminium Electrolytic Capacitors](https://uk.rs-online.com/web/content/discovery/ideas-and-advice/aluminium-capacitors-guide).

### 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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Electrolytic Capacitor | Aluminium Capacitor | RS

Aluminium Capacitors

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Electrolytic Aluminium Capacitors | RS

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Epcos Aluminium Capacitors | RS Components

Discover reliable Panasonic Aluminum Electrolytic Capacitors at RS for various electronic applications. Shop now!

Panasonic Aluminium Electrolytic Capacitors | RS

<p>Panasonic Aluminium Electrolytic Capacitors are electronic components used for storing and regulating electrical charge in circuits. These capacitors are used for smoothing voltage fluctuations, filtering noise, and energy storage and are found in a wide range of electronic devices and systems, including:</p><ul><li>Power supplies</li><li>Audio equipment</li><li>Lighting fixtures</li><li>Automotive electronics</li><li>Industrial machinery</li></ul><h2>Panasonic Aluminium Electrolytic Capacitors features:</h2><ul><li>Capacitance &ndash; available in a wide range of capacitance values, typically spanning from a few microfarads to several thousands of microfarads. This capacitance determines the amount of charge the capacitor can store.</li><li>Various Voltage Ratings ranging from low voltage (e.g., a few volts) to high voltage (e.g., several hundred volts). The voltage rating indicates the maximum voltage the capacitor can withstand.</li><li>Temperature Range - designed to operate within specific temperature ranges, ensuring reliable performance across different environmental conditions. Common temperature ranges include -40&deg;C to +105&deg;C or higher.</li><li>Longevity and Reliability - designed to withstand prolonged use in various applications without significant degradation in performance.</li></ul><h2>Types of Aluminium Electrolytic Capacitors</h2><p>Panasonic offers various types including radial lead type, surface mount type, snap-in type, and screw terminal type, among others. Each type is designed for specific mounting configurations and application requirements.</p><p>Panasonic Aluminium Electrolytic Capacitors are widely used in the electronics industry due to their reliability, versatility, and performance characteristics. They are available in different series, each tailored to meet specific needs and specifications of different applications.</p>

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Panasonic S series Aluminium Electrolytic Capacitors | RS

<p>The Panasonic S series consists of surface mount (SMD) type, polarised aluminium electrolytic capacitors.</p><h2>S series features include:</h2><ul><li>Capacitance ranges from 1 microfarad (&micro;F) to 1500 &micro;F.</li><li>Voltage rating: The voltage rating can vary between 4 volts (V) and 100 volts (V) depending on the specific model.</li><li>Endurance - offer a lifespan of 2000 hours at a high temperature of +85&deg;C.</li><li>SMD type - for surface mounting on circuit boards.</li><li>They are AEC-Q200 qualified, making them suitable for automotive applications with demanding environments.</li></ul>

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Panasonic M series Aluminium Electrolytic Capacitors | RS

<p>The Panasonic M series is a line of radial lead type aluminium electrolytic capacitors. Compared to the Panasonic SU series, the M-A series boasts a more compact design making them ideal for applications with space constraints.</p><h2>M series features:</h2><ul><li>Radial leads - they have leads for through-hole mounting on PCBs.</li><li>Capacitance range: 2.2 &micro;F to 22000 &micro;F.</li><li>Voltage rating varies depending on the specific model (typically 6.3V or higher).</li><li>They are suitable for general purpose applications in various electronic devices due to their standard features and endurance rating</li><li>Their operating temperature range typically falls between -40&deg;C to +85&deg;C</li></ul>

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Panasonic F series Aluminium Electrolytic Capacitors | RS

<p>The Panasonic FT series consists of surface mount type, aluminium electrolytic capacitors designed for high-performance applications. These electrolytic capacitors are suitable for a wide range of applications that require high performance, small size, and long life, such as power supplies, converters, industrial automation equipment, and automotive electronics.</p><h2>FT series features:</h2><ul><li>High temperature tolerance making them suitable for environments with demanding thermal conditions.</li><li>Long life expectancy</li><li>Low ESR (Equivalent Series Resistance) - which translates to lower energy loss and improved efficiency in circuits which is crucial for applications that require high ripple current handling.</li><li>High capacitance</li><li>Smaller case sizes compared to previous models, saving valuable board space</li><li>AEC-Q200 compliant, making them ideal for automotive electronics that need to function reliably under harsh conditions.</li></ul>

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Panasonic NHG Aluminium Electrolytic Capacitors | RS

<p>The Panasonic HC series of aluminium electrolytic capacitors are designed for surface mounting on PCBs. Due to their high temperature tolerance, long life expectancy, and vibration resistance, they are ideal for various applications in industrial settings, automotive electronics, and power supplies.</p><h2>HC series features:</h2><ul><li>High temperature tolerance</li><li>Long life expectancy</li><li>AEC-Q200 compliant making them suitable for demanding automotive environments with vibration and harsh temperatures</li><li>Capacitance and voltage rating will vary depending on the specific model. You can typically find a range of capacitance values from 1 &mu;F to 1000 &mu;F and voltage ratings from 6.3V to 50V</li></ul>

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Panasonic FK series Radial Aluminium Electrolytic Capacitors | RS

<p>The Panasonic FK Radial Series refers to a line of Aluminium Electrolytic Capacitors manufactured by Panasonic. Radial capacitors are characterised by their lead configuration, where the leads come out from opposite sides of the capacitor body, making them suitable for through-hole PCB mounting.</p><p>The FK series offers a range of capacitance and voltage ratings to suit various applications.</p>

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Panasonic FK SMD Aluminium Electrolytic Capacitors | RS

<p>The Panasonic FK Series SMD type refers to a line of Surface Mount Device (SMD) Aluminium Electrolytic Capacitors manufactured by Panasonic. SMD capacitors are designed to be mounted directly onto the surface of a printed circuit board (PCB), making them suitable for automated assembly processes commonly used in electronics manufacturing.</p><h2>FK series features:</h2><ul><li>Low ESR (Equivalent Series Resistance) - translates to lower energy loss and improved efficiency in circuits, especially beneficial for applications with high ripple current handling.</li><li>Wide temperature range</li><li>Available in various case sizes for different space requirements on PCBs.</li><li>Anti-vibration options - some models are able to withstand up to 30G, making them ideal for applications with mechanical stress</li></ul>

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Hybrid Aluminium Electrolytic Capacitors | RS

<p>Hybrid and conductive polymer hybrid aluminium electrolytic capacitors are capacitor technologies that combine aspects of traditional aluminium electrolytic capacitors and solid polymer electrolytic capacitors.</p><h2>Hybrid aluminium electrolytic capacitors benefits:</h2><ul><li>Offer a balance between capacitance and ESR compared to the individual capacitor types.</li><li>Have better stability over temperature and frequency compared to traditional aluminium capacitors.</li><li>Show improved leakage current characteristics compared to traditional aluminium capacitors.</li></ul><h2>Applications:</h2><p>These hybrid capacitors are suitable for applications that require a balance of high capacitance, moderate to low ESR, and good lifespan, such as:</p><ul><li>Power supplies in various electronic devices.</li><li>Voltage regulators in circuits.</li><li>Coupling and decoupling capacitors for filtering noise.</li></ul>

Discover Panasonic NHG series at RS. High-quality Aluminum Electrolytic Capacitors for reliable performance in electronic applications.

<p>The Panasonic NHG series is a line of radial leaded aluminium electrolytic capacitors.</p><h2>NHG series features include:</h2><ul><li>High temperature tolerance - they can withstand operating temperatures up to 105 &deg;C.</li><li>Long life expectancy - depending on the voltage rating, they have an endurance of 1000 to 2000 hours at 105 &deg;C.</li><li>Capacitance ranges from 2.2 &mu;F to 22000 &mu;F.</li></ul><p>Some models in the NHG series are also AEC-Q200 compliant, which means they meet the Automotive Electronics Council's standards for components used in harsh automotive environments.</p>

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