Capacitors Blog

This is a measure of a capacitor's ability to store charge. A large capacitance means that more charge can be stored. Capacitance is measured in farads, symbol F. However 1F is very large, so prefixes are used to show the smaller values.

Three prefixes (multipliers) are used, µ (micro), n (nano) and p (pico):

µ means 10-6 (millionth), so 1000000µF = 1F
n means 10-9 (thousand-millionth), so 1000nF = 1µF
p means 10-12 (million-millionth), so 1000pF = 1nF

Capacitor values can be very difficult to find because there are many types of capacitor with different labelling systems!

There are many types of capacitor but they can be split into two groups, polarised and unpolarised. Each group has its own circuit symbol.

A capacitor is a passive electronic component that store senergy in the form of an electrostatic field. In its simplest form, a capacitor consists of two conducting plates separated by an insulating material called the dielectric. The capacitance is directly proportional to the surface areas of the plates, andis inversely proportional to the separation between the plates. Capacitance also depends on the dielectric constant of the substance separating the plates.

The standard unit of capacitance is the farad, abbreviate dF. This is a large unit; more common units are the microfarad, abbreviated µF (1 µF =10-6F) and the pico farad, abbreviated pF (1 pF = 10-12 F).

Capacitors can be fabricated onto integrated circuit (IC)chips. They are commonly used in conjunction with transistors in dynamic random access memory (DRAM). The capacitors help maintain the contents of memory. Because of their tiny physical size, these components have low capacitance. They must be recharged thousands of times per second or the DRAM will lose its data.

Large capacitors are used in the power supplies of electro nice quipment of all types, including computers and their peripherals. In these systems, the capacitors smooth out the rectified utility AC, providing pure, battery-like DC.

Aluminum electrolytic capacitor maker Lelon Electronics has seen extra orders from China appliance makers due to the China government's program to promote sales of home appliances in rural areas. The extra orders have covered Lelon's reduced orders from the US and Europe, the company said.

The price of aluminum electrolytic capacitors has been stable since August 2008, while the price of aluminum foil continues to drop, lowering Lelon's cost pressure. However, order visibility for aluminum electrolytic capacitors is still low, the company noted.

Lelon has entered the wind power market with its large-size capacitors, and plans to apply the product to other applications. The company has already shipped a small volume of large-size capacitors to a motorcycle maker and expects to expand into the automotive segment.

NIC Components has unveiled a new range of film chip capacitors which are designed to offer stable characteristics over a wide operating temperature range.

The NSMX series of wound, metallised polyphenylene sulphide film capacitors can be used in applications that require low-absorption characteristics.

According to the company, they are suitable for use in power supplies requiring low-loss parameters.

The product has an operating temperature range of -40 degrees c to 125 degrees c and is RoHS compliant.

NSMX series is also compatible with the latest SAC reflow soldering processes up to 260 degrees c.

The firm states that it has very stable temperature, frequency, voltage, bias and dielectric absorption, with ElectronicsTalk stating that this makes them an alternative to other dielectrics such as MLCCs.

Meanwhile, Vishay recently announced the release of three new X2 electromagnetic interference suppression film capacitors, which it claims offer an increased voltage rating while continuing to meet safety approvals.

Rapid Electronics are a leading UK supplier of electronic components, electrical products and industrial equipment to the Assembly Manufacturer sector

Suntan Technology Company Limited
----All Kinds of Capacitors

What is Gold Capacitor?
The storage cell that used absorption/release reaction of ions;
No expendable chemical reaction while charge and discharge

Gold Capacitor Features:
Quick charge and discharge are available;
High capacitance

Gold Capacitor Applications:
Coin type: Back-up for memory;
Wound type: Motor drive, Back-up for solar battery

A capacitor or condenser is a passive electrical component consisting of an insulating, or dielectric, layer between two conductors. When a voltage potential difference occurs between the conductors, an electric field occurs in the insulator. This field can be used to store energy, to resonate with a signal, or to link electrical and mechanical forces. Capacitors are manufactured as electronic components for use in electrical circuits, but any two conductors linked by an electric field also display this property. The effect is greatest between wide, flat, parallel, narrowly separated conductors.

An ideal capacitor is characterized by a single constant value, capacitance, the ratio of the amount of charge in each conductor to the potential difference between them. The unit of capacitance is thus coulombs per volt, or farads. Higher capacitance indicates that more charge may be stored at a given energy level, or voltage. In actual capacitors, the insulator allows a small amount of current through, called leakage current, the conductors add an additional series resistance, and the insulator has an electric field strength limit resulting in a breakdown voltage.

Suntan Technology Company Limited
----All Kinds of Capacitors

Trimming Potentiometers is used by more and more products, its application including satellite receivers, modems, LCD displays, set-top boxes, and meters and instruments, as well as entertainment devices, such as cameras, and MP3 players...

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TSR-3323 - 7 Terminal Square Trimming Potentiometers
TSR-3296 - 5 Terminal Square Trimming Potentiometers
TSR-3362 - 9 Terminal Square Trimming Potentiometers
TSR-3386 - 8 Terminal Square Trimming Potentiometers
TSR-3329 - Circularity Trimming Potentiometers
TSR-3266 - 5 Terminal Square Trimming Potentiometers
TSR-3318 - 6mm Phenolic Round Trimming Potentiometers
TSR-3306 - 6mm Cermet Round Trimming Potentiometers
TSR-3309 - 9mm Round Trimming Potentiometers
TSR-065 - Phenolic Trimming Potentiometers
TSR-3590 - Precision Multiturn Wirewoud Potentiometer
TSR-105H - 6 Terminal Trimming Potentiometers

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• High Voltage MLCC 1206 0.027uF 500V X7R 10% US$28.0/kpcs
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