Capacitors

What is a Capacitor?

Capacitor is an electronic component consisting of two conductors (plates) separated by a dielectric. Applying voltage to the capacitor plates causes electric charge to accumulate on them. We have aluminum electrolytic, mica, and film...

What is a Capacitor?

Capacitor is an electronic component consisting of two conductors (plates)...

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Products that are marked "On Order" in the "Available Quantity" column are usually not in stock. Such products are available for purchase, however, due to their limited customer base, they usually have higher minimum quantities. DACPOL offers products that are not in stock for the following reasons: DACPOL currently has a large number of electronic components in stock and adds new products every day, however, tens of thousands of additional components and their various variants are available from our suppliers. Even though it is unreasonable to have all these products in stock due to the limited sales, we believe that it is in the best interest of our customers to make them available. Our goal is to inform customers about the maximum number of products available and enable them to make decisions based on specifications, prices, availability, required minimums and our technical advice. Please note that selecting the "In Stock" checkbox may limit the display to only products available for delivery straight from the shelf.
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picture_as_pdf E51.P17-503R20 Axial DC capacitors with low inductance ELECTRONICON Kondensatoren E51.P17-503R20 Axial DC capacitors with low inductance SEE IT E51.P17-503R20 On Order -- 50 -- -- 2500 -- 800 3750 3750 -- -- 4-Sep -- -- -- -- 90 170 3-Jan 9-Mar -- 50 5/FB8 -- -- -- 70 --
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What is a Capacitor?

Capacitor is an electronic component consisting of two conductors (plates) separated by a dielectric. Applying voltage to the capacitor plates causes electric charge to accumulate on them. We have aluminum electrolytic, mica, and film capacitors.

The basic parameters of capacitors are:

  • Capacitance C [F] – The unit of capacitance is Farad [F]. In practice, smaller units are used, such as mF (10-3 F), µF (10-6 F), nF (10-9 F), pF (10-12 F). Capacitance is given with an allowable tolerance.
  • Rated voltage Un [V] – The maximum voltage that can appear on the capacitor continuously without changing its properties. Due to the wide variety of capacitor types, the rated voltage can be DC, AC at a specified frequency, or pulse voltage.
  • Equivalent series resistance ESR [Ω] – Represents the total losses in the capacitor, which besides the series resistance of leads and electrodes Rs, includes losses in the dielectric caused by interaction with a varying electric field. ESR is a function of frequency and temperature.
  • Equivalent series inductance ESL [H] – Includes the inductance of the leads and capacitor electrodes.
  • Rated current In [A] – The maximum RMS current that can flow through the capacitor continuously.

Depending on the type of dielectric, capacitors can be divided into the following groups:

  • Aluminum electrolytic capacitor – In this type of capacitor, the dielectric is aluminum oxide with thickness depending on the capacitor's rated voltage. Electrodes of electrolytic capacitors are marked and should be connected to a DC source with the positive electrode to the plus terminal and the negative electrode to the minus terminal. The main advantage of electrolytic capacitors is achieving very high capacitance relative to their size, possible due to the large surface area of the electrodes and the use of a thin dielectric. The capacitance range we offer is from 33 µF to 220,000 µF, and rated voltages from 10 V to 500 V. These capacitors are used in electronic devices. A special type is industrial electrolytic capacitors, which, thanks to the special construction of electrodes, have low series resistance and impedance, enabling large ripple currents. Their capacitance range is from 100 µF to 1,500,000 µF, with rated voltages from 10 V to 500 V. These capacitors are used in power electronic devices, e.g., UPS, inverters, and switch-mode power supplies.
  • Mica capacitor – Has a structure similar to a ceramic capacitor, but due to a different manufacturing process, it can have silver electrodes. Mica capacitors are characterized by very high insulation resistance, low loss, and high parameter stability. Offered capacitances range from 51 pF to 0.51 µF, with voltages from 250 V to 15 kV. Due to their properties, they are mainly used in high-frequency circuits.
  • Film capacitor – This is a capacitor with a dielectric made of plastic materials, most often polypropylene, metallized polypropylene, or polyester. Plastic dielectric capacitors are characterized by low loss, resulting from low electrode resistance and high insulation resistance. These capacitors can handle large currents (up to several thousand Amperes) and high rated voltages (up to tens of thousands of volts), making them suitable for power electronics as commutation, snubber, and filtering capacitors, as well as for reactive power compensation, induction heating generators, and high-voltage circuits.

Various types of capacitors from a trusted supplier

In our offer, we have various types of capacitors used in electronics and power systems. Each capacitor is made of two conductors and allows efficient storage of electrical energy and control of current flow.

We offer products in various packages that can be easily integrated with other components such as resistors or diodes. Tantalum and electrolytic capacitors are characterized by high durability and resistance to temporary voltage spikes. Our range also includes capacitors for analog circuits, blocking voltage surges and supporting signal systems.

We also offer trimmers and capacitors for low-voltage applications, ideal for precise electronic circuits. We encourage you to explore our offer, which includes a wide selection of capacitors and basic passive and active components for professional use.