jbcapacitors blog

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.

In order to show a comprehensive product scope to our customers, jb updated Sample Box once again.

New Sample box part one is for Film Capacitors, which included with Motor Capacitors, Class X2 Film Capacitors, Premium & Superior Audio Capacitors, Metallized Polyester Film Capacitors and Metallized Polypropylene Film Capacitors

New Sample box part two is for Aluminum Electrolytic Capacitors, which included with SMD Aluminum Electrolytic Capacitors, Radial Aluminum Electrolytic Capacitors and Large Can Aluminum Electrolytic Capacitors (Snap-in Type, Screw Type, Lug Type)

If your business falls in one of the above two fields, you can ask our sales person to send the designated sample box to you.
We suggest to ship the sample box with your products to save the shipping charge at both of our side.

For one important notice, all the samples in the samples box are for display only and not for testing purpose.
If have interesting in testing our jb capacitors real samples. Please do not hesitate to contact our sales and send your samples request at our earlist.

An aluminum electrolytic capacitor, usually simply called an electrolytic capacitor (e-cap), is a capacitorwhose anode (+) consists of pure aluminum foil with an etched surface, covered with a uniformly very thin barrier layer of insulating aluminum oxide, which operates as a dielectric. 

The electrolyte, which covers the rough surface of the oxide layer, operates as the second electrode, the cathode (-). 

E-caps have the largest capacitance values per unit volume compared to the two other main conventional capacitor families, ceramic and plastic film capacitors, but articulately smaller capacitance than similar sized supercapacitors.

Come to us jb Capacitors, a professional manufacturer for film capacitors, and aluminum electrolytic capacitors.

let us provide you the most professional support on technical side, marketing side.

"No matter how long the winter, spring is sure to follow." ——Proverb 

"April hath put a spirit of youth in everything." ——William Shakespeare 

"You can cut all the flowers but you cannot keep Spring from coming" ——Pablo Neruda 

"Spring -- an experience in immortality." ——Henry D. Thoreau 

"Spring is nature's way of saying, 'Let's party!'"  ——Robin Williams 

"Spring is when life's alive in everything." -Christina Rossetti 

"In the spring time, the only pretty ring time, when birds do sing ... sweet lovers love the spring."
——William Shakespeare 

"Spring is when you feel like whistling even with a shoe full of slush." ——Doug Larson 

"An optimist is the human personification of spring." ——Susan J. Bissonette

As a marketing manager in jb capacitors for 6 years, I have witnessed the development of our company in the past years.
The biggest success in year 2015 is that we achieved a " Zero Tolerance" for Quality Defects.

This impressive result cannot be accomplished without jb hard working members, especially Quality and Engineer Departments.
Besides this, we also provide technical assistance to all of our jb capacitors customers. Our expertise are highly praised by customers.
We are not only selling products, we are bringing you satisfying user experience and quality assurance.

In year 2016, we will pursue higher standard both in quality and service. We are just your best choice.

An electrolytic capacitor is a type of capacitor that uses an electrolyte to achieve a larger capacitance than other capacitor types. An electrolyte is a liquid or gel containing a high concentration of ions. 
Almost all electrolytic capacitors are polarized, which means that the voltage on the positive terminal must always be greater than the voltage on the negative terminal. 
The benefit of large capacitance in electrolytic capacitors comes with several drawbacks as well. 
Among these drawbacks are large leakage currents, value tolerances, equivalent series resistance and a limited lifetime. 

Electrolytic capacitors can be either wet-electrolyte or solid polymer. They are commonly made of tantalum or aluminum, although other materials may be used. 
Super capacitors are a special subtype of electrolytic capacitors, also called double-layer electrolytic capacitors, with capacitances of hundreds and thousands of farads.  

This article will be based on aluminum electrolytic capacitors. These have a typical capacitance between 1µF to 47µF and an operating voltage of up to a few hundred volts DC. 
Aluminum electrolytic capacitors are found in many applications such as power supplies, computer motherboards and many domestic appliances. Since they are polarized, they may be used only in DC circuits.

Read more information please check our company website: http://www.jbcapacitors.com/Aluminum-Electrolytic-Capacitors/

From jb Capacitors Company sales department

jb Capacitors Company return to normal work after CNY holiday already, please feel free to contact our sales for your any requests or orders. 
We are ready to give you the fullest support, and hope we can get more win-win business in this new year 2016. 

In Febuary, we have below special offer for SMD type aluminum electrolytic capacitors, prices support are much more better than normal, please kindly send us your RFQs for quote, thanks.

JCS- SMD aluminum electrolytic capacitors, 2000hours at 85C'
JCK- SMD aluminum electrolytic capacitors, 1000~2000hours at 105C'
JCC - 2000H at 85°C, Low Leakage SMD Aluminum Electrolytic Capacitor
JCD - 2000H at 105°C, Low Impedance SMD Aluminum Electrolytic Capacitor
JCE - 3000H at 105°C, Long Life Assurance SMD Aluminum Electrolytic Capacitor
JCL - 5000H at 105°C SMD Aluminum Electrolytic Capacitor
JCN - 1000H at 85°C, Bi-polar SMD Aluminum Electrolytic Capacitor
JCZ - 3000H at 105°C, Extra Lower Impedance SMD Aluminum Electrolytic Capacitor

Dear Customers,

Hi, please kindly to notice that our workers will have Chinese spring festival holiday (on Dec.30th ~ Feb.14th), but our jb sales team will still work during holiday, when you have any urgent capacitor request/ orders, welcome to contact us at once, we'll give you a fast reply as usual. Thank you.

Please keep focus on our hot seller items: MTK, MKP, X2 MKP film capacitors and Radial / SMD Aluminum electrolytic capacitors

Happy chinese new year to you!  

From jb Capacitors Company sales department

In year 2015, jb Capacitors added below Strong Products to our production line.
We wish to give you best support in year 2016. Let us work together to make more business chance.

JFZ-X2 310VAC met polypropylene film capacitors
JFS-Motor Running capacitors
JSX-Superior metallized polypropylene Cap.
JRB-105°C Radial Aluminum Electrolytic Capacitor

If you need to know more detailed information, please check below link for reference.

jb Capacitors Company Home Page of Catalog 
jb Capacitors Company JFA to JFL (Polyester & Polypropylene Film Capacitors) 
jb Capacitors Company JFM to JFZ (Plastic Film Capacitors & Motor Capacitors) 
jb Capacitors Company JCS to JSW (SMD E Cap,Radial & Large Can Aluminum Electrolytic Capacitors) 

jb Capacitors Company Offer Ammo Package for Radial Aluminum electrolytic capacitors, MKT MKP film capacitors, make your PCB Assembly more easy, automative assemby, you will save more labor cost. :)

Welcome to send me your request!

More information please check below link: http://www.jbcapacitors.com/products.html