jbcapacitors blog

Supercapacitors used in high-power power supplies and large-scale industrial power supplies. Now we have found their use in products of various sizes, especially portable devices. Supercapacitors are well-known for their capacitance values up to thousands of farads and fast charging and discharging rates.

Due to the ability to store large amounts of electrical energy for a long time, the supercapacitor behaves more like a battery than a standard capacitor. In fact, as technology advances, they will replace rechargeable batteries in many products, from computers, digital cameras, mobile phones to other handheld devices.

Today,Many countries in the world are actively carrying out research and development related to supercapacitors. The main manufacturers are: MAXWELL and Ioxus in the United States, EL NA and PANASONIC in Japan, LS Mtron and Vina Technology in South Korea, and ECOND in Russia. jb Capacitors Company of China brand, it’s a nice choose:

JGA - 5.5V Standard Coin Type Super Capacitors
JGM - 5.5V 7.5V Combined Type Super Capacitors
JGY - 5V 7.5V Combined Type Super Capacitors
JGZ - 2.7V 3V Low ESR Radial Snap in Screw Type Super Capacitors

 

The electrolytic capacitor has been in use for many years. Its history can be traced back to the very early days or radio around the time when the first broadcasts of entertainment were being made. At the time, valve wireless sets were very expensive, and they had to run from batteries. 
However with the development of the indirectly heated valve or vacuum tube it became possible to use AC mains power.

While it was fine for the heaters to run from an AC supply, the anode supply needed to be rectified and smoothed to prevent mains hum appearing on the audio. 
In order to be able to use a capacitor that was not too large Julius Lilienfield who was heavily involved in developing wireless sets for domestic use was able to develop the electrolytic capacitor, allowing a component with sufficiently high capacitance but reasonable size to be used in the wireless sets of the day.

Electrolytic capacitor symbols

The electrolytic capacitor is a form of polarised capacitor. The electrolytic circuit symbol indicates the polarity as it is essential to ensure that the capacitor is fitted into the circuit correctly and is not reverse biased.

Circuit symbols used for polarised capacitors like the electrolytic capacitor

There is a variety of schematic symbols used for electrolytic capacitors. The first one '1' is the version that tends to be used in European circuit diagrams, while '2' is used in many US schematics, and '3' may be seen on some older schematics. Some schematic diagrams do not print the "+" adjacent to the symbol where it is already obvious which plate is which.