jbcapacitors blog

After updated the RoHS2.0 for radial type aluminum electrolytic capacitors, we updated our certificate for ISO again in March. 
And we will update the RoHS2.0 for all film capacitors and SMD type aluminum electrolytic capacitors 
soon. 

jb capacitors are working more hard to get the best support for our customers, we are looking forward to win more & more market shares together with our customers. 

We welcome more win-win cooperations. 

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.

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.

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

Good news to announce that we updated jb Radial Electrolytic Capacitors RoHS 2.0 report at the early of 2016.
The goods we supply are with RoHS compliant and lead free.

Radial Aluminum Electrolytic Capacitors include below series, other specification available on request.

JRA - 2000H at 85°C, Radial Aluminum Electrolytic Capacitors (Hot)
JRB - 2000H at 105°C, Radial Aluminum Electrolytic Capacitors(Hot)
JRC - 2000H at 105°C, Radial Aluminum Electrolytic Capacitors
JRD - 5000H at 105°C, Radial Aluminum Electrolytic Capacitors
JRG - 10000H at 105°C, Radial Aluminum Electrolytic Capacitors

More information please check below link:
http://www.jbcapacitors.com/pdf/jb-Radial-Electrolytic-Capacitors-Leaflet.pdf

More information please check below link:
http://www.jbcapacitors.com/Aluminum-Electrolytic-Capacitors/JNC-2000H-at-85-Snap-in-Aluminum-Electrolytic-Capacitor.html
http://www.jbcapacitors.com/Aluminum-Electrolytic-Capacitors/JNE-Snap-in-105-Miniaturized-Aluminum-Electrolytic-Capacitor.html

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

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

We would like to share the most common Radial Aluminum Electrolytic to our customers.
Please find below table for reference.

More information please check below link:
http://www.jbcapacitors.com/Aluminum-Electrolytic-Capacitors/JRB-105-Radial-Aluminum-Electrolytic-Capacitors.html

Dear all valued members, let's start from a story today. 

Once upon a time, there was a man who's very stubborn to his consciousness. Change always makes surprise. 
As time goes by, he suddenly asked us for a free sample to test . Then make a good quantity order to us. That's JRB series- Radial aluminum electrolytic capacitors, 2000hours at 105'C. Wide temperature range and long life for general purpose. 

JRB- Radial aluminum electrolytic capacitors
Operating Temp.: -40℃ ~ +105℃
Standard Cap. tolerance: +/-20%
Cap. range: 0.1uF~0.22000uF
Rated Voltage: 6.3V ~ 100V

JRB- Radial aluminum electrolytic capacitors
Operating Temp.: -25℃ ~ +105℃
Standard Cap. tolerance: +/-20%
Cap. range: 0.47uF~470uF
Rated Voltage: 160V ~ 450V

This is a hot sale series in 2015. You will speak highly for them as well.
Please send us RFQ without any hesitation.