jbcapacitors blog

Round Feed Through capacitors, in a skin tight plastic wrap with solderable ends (Style Q). The hole in the center of the capacitor is either a Teflon Tube, Paper Tube or Phenolic Tube ranging in sizes from just a wire to a large threaded stud to fit through. The majority of Feed Throughs are custom made to exact customer requirements. They are very popular in filter applications.

The flatband diagram is by far the easiest energy band diagram. The term flatband refers to fact that the energy band diagram of the semiconductor is flat, which implies that no charge exists in the semiconductor. The flatband diagram of an aluminum-silicon dioxide-silicon MOS structure is shown in Figure 6.2.4. Note that a voltage, V_FB, must be applied to obtain this flat band diagram. Indicated on the figure is also the work function of the aluminum gate, F_M, the electron affinity of the oxide, c_oxide, and that of silicon, c, as well as the bandgap energy of silicon, E_g. The bandgap energy of the oxide is quoted in the literature to be between 8 and 9 electron volt. The reader should also realize that the oxide is an amorphous material and the use of semiconductor parameters for such material can justifiably be questioned.

The flatband voltage is obtained when the applied gate voltage equals the workfunction difference between the gate metal and the semiconductor. If there is a fixed charge in the oxide and/or at the oxide-silicon interface, the expression for the flatband voltage must be modified accordingly.
Learn more about jb capacitors company:http://www.jbcapacitors.com/

Figure: Flatband energy diagram of a metal-oxide-semiconductor (MOS) structure consisting of an aluminum metal, silicon dioxide and silicon.

On Nov 9th~12th,2010, jb Capacitors Company exhibit at Electronica 2010 in Munich, Germany.
Booth No. is B6.437/10.

Below you can see our green booth photos. Our booth are very popular, many customers visited our booth with great pleasure.
Our exhibition are very successful.

On the show, we exhibit below, also welcome to contact our sales if you are interested in our leafletes, sample kits, and green bags, and samples.

1. jb Capacitors green leaflets
2. jb Capacitors green sample kits
3. jb Capacitors green bags
4. jb Capacitors samples: including below different series of samples:

JFB - Metallized Polyester Film Capacitor
0.1uF 250V +/-10% P:10mm Bulk RoHS 
0.047uF 400V +/-10% P:10mm Bulk RoHS 
0.47uF 250V +/-10% P:15mm Bulk RoHS

JFD - Box Type Metallized Polyester Film Capacitor
0.1uF 250V +/-10% P:15mm Bulk RoHS

JFJ - Mini Box Stacked Metallized Polyester Film Capacitor
0.047uF/63V +/-5% P:5mm Bulk RoHS 
0.15uF 100V +/-5% P: 5mm Bulk RoHS
0.22uF 63V +/-5% P:5mm Bulk RoHS
0.1uF 100V +/-5% P:5mm 7.2*6.5*2.5mm Bulk RoHS

JFL - Metallized Polypropylene Film Capacitor
0.33uF 100V +/-10% P:15mm Bulk RoHS

Axial Metallized Polyester & Polypropylene Film Capacitor 
JFGA 0.22uF 100V +/-10% 15*7MM Bulk RoHS
JFGA 0.33uF 630VDC +/-10% Bulk RoHS

JFX - Premium Met Polypropylene Film Capacitors – Axial
4.7uF 250V +/-5% Bulk RoHS

JFN - X2 Metallized Polypropylene Film Capacitor 
0.1uF 275VAC +/-10% P:15mm Bulk RoHS
0.15uF 275VAC +/-10% P:15mm Bulk RoHS 
0.22uF 275VAC +/-10% P:15mm Bulk RoHS
0.1uF 275VAC +/-10% P:10mm Bulk RoHS 
0.33uF 275VAC +/-10% P:15mm Bulk RoHS 
0.47uF 275VAC +/-10% P:22.5mm Bulk RoHS 
0.068uF 275VAC +/-10% P:10mm Bulk RoHS

JFO - X2 Metallized Polypropylene Film Capacitor
0.047uF 275VAC +/-10% P:10mm Bulk RoHS
0.1uF 275VAC +/-10% P:10mm Bulk RoHS
0.33uF 275VAC +/-10% P:15mm Bulk RoHS
0.47uF 275VAC +/-10% P:15mm Bulk RoHS

JFP - High Voltage Met Polypropylene Film Capacitor
470pF 2000V +/-10% P:15mm Bulk RoHS

JCS--SMD - Aluminum Electrolytic Capacitors
10uF 50V +/-20% 6.3x5.4mm 2000h at 85°C
22uF 16V +/-20% Size:4*5.4mm 2000h at 85°C

JNE--Snap in Aluminum Electrolytic Capacitors
470uF 200V +/-20% 2000h 25x30mm P:10mm 2000h at 105°C Bulk RoHS

JMJ--Screw terminals Aluminum Electrolytic Capacitors
22000uF 63V +/-20% Size: 51x80mm 2000h at 85°C Bulk RoHS

Our jb capacitors company exhibit in 2010 ElectronicsAsia HK show, many customers visited our green booth , our three sales girls who were wearing green jackets , stand in the green booth and welcome all the customers all over the world.

During the meeting, we display below our strong series samples, green bags, green leaflets and sample kits to customers , and they check our quality and send us their inquires. All of us enjoy the wonderful moment in the HK fair.

• JFA--Mylar polyester film capacitor
• JFB--Metallized polyester film capacitor
• JFD--Box metallized polyester film capacitors
• JFG--Axial polyester&polypropylene film capacitors
• JFL--Metallized polypropylene film capacitor
• JFO--X2 metallized polypropylene film capacitor
• JFN--X2 Metallized polypropylene film capacitors
• JFP--High voltage metallized polypropylene film capacitor
• JFX--Preminum metallized polypropylene film capacitors, for high-end audio products
• JCS,JCK--Standard SMD Aluminum Electrolytic capacitors
• Snap in terminals, Screw terminals and lug terminals for photo flash Aluminum Electrolytic capacitors

Our jb capacitors company sincerely hope to work with all the customers in the world. And we will exhibit in HK fair every year, welcome you visit our booth in 2011.

Next month on November 9th~12th, JB capacitors company will exhibit Electronica 2010 in Munich, Germany. Welcome to visit our booth No. B6.437/10

Do you buy Axial polyester & polypropylene film capacitors? Our JFG series are axial lead polyester & polypropylene film capacitors, widely used in loudspeaker, amplifiers ...manufacturers all over the word.

JFG--Axial Metallized Polyester / Polypropylene Film Capacitor

• Wide capacitance range: 0.033uF-68uF
• Rated Voltage: 100V,250V,400V,630V, 1000V,1250VDC
• CYCLOIDAL and FLAT OVAL SHAPE both available
• Cross reference:CL20 and CBB20, Arcotronics C4C-C4H-C4G-C4M,  Konek MKT69, MKT 70, Vishay MKT1813...

Datasheet: http://www.jbcapacitors.com/pdf/JFG-Axial-Metallized-Polyester-Polypropylene-Film-Capacitor.pdf

Welcome to send us inquiry or part number , we would like to quote our best price or cross for you.

Capacitor is an electromechanical device capable of storing electrical energy (electrons). It differs from a battery, as a battery produces electrical energy as a by-product of chemical activity. A capacitor can function in a circuit like a battery. Or a resistor, or an inductor, for that matter. It can also absorb energy, turning some into heat.

A farad of capacitance is a lot of capacitance. In high voltage, we generally deal in microfarads (mfd.) or picofarads (pf) which are one millionth of a farad and one millionth of 1 millionth of a farad, respectively. Infrequently used, a nanofarad is one thousandth of a microfarad.
Learn more:http://www.jbcapacitors.com/

电容降压的工作原理并不复杂。他的工作原理是利用电容在一定的交流信号频率下产生的容抗来限制最大工作电流。

例如，在50Hz的工频条件下，一个1uF的电容所产生的容抗约为3180欧姆。当220V的交流电压加在电容器的两端，则流过电容的最大电流约为70mA。虽然流过电容的电流有70mA，但在电容器上并不产生功耗，因为如果电容是一个理想电容，则流过电容的电流为虚部电流，它所作的功为无功功率。

根据这个特点，我们如果在一个1uF的电容器上再串联一个阻性元件，则阻性元件两端所得到的电压和它所产生的功耗完全取决于这个阻性元件的特性。例如，我们将一个110V/8W的灯泡与一个1uF的电容串联，在接到220V/50Hz的交流电压上，灯泡被点亮，发出正常的亮度而不会被烧毁。因为110V/8W的灯泡所需的电流为8W/110V=72mA，它与1uF电容所产生的限流特性相吻合。同理，我们也可以将5W/65V的灯泡与1uF电容串联接到220V/50Hz的交流电上，灯泡同样会被点亮，而不会被烧毁。因为5W/65V的灯泡的工作电流也约为70mA。

因此，电容降压实际上是利用容抗限流。而电容器实际上起到一个限制电流和动态分配电容器和负载两端电压的角色。

采用电容降压时应注意以下几点：

• 1.根据负载的电流大小和交流电的工作频率选取适当的电容，而不是依据负载的电压和功率。
• 2.限流电容必须采用无极性电容，绝对不能采用电解电容。而且电容的耐压须在400V以上。最理想的电容为铁壳油浸电容。
• 3.电容降压不能用于大功率条件，因为不安全。
• 4.电容降压不适合动态负载条件。
• 5.同样，电容降压不适合容性和感性负载。
• 6.当需要直流工作时，尽量采用半波整流。不建议采用桥式整流。而且要满足恒定负载的条件。

以上是电容降压工作原理的简单介绍。其实电阻、电容和电感作为电子电路的基本元件，熟知它们的特性并灵活地应用它们是非常重要的。

jb конденсаторы сосредоточиться на алюминиевых электролитических конденсаторов типа стандартных SMD с 1980 года, высокое качество с самым лучшим ценой.

Многие свободные руки автопроизводителей телефон купить от JB.

• JCS --Алюминиевый электролитический конденсатор SMD типа 2000h на 85C
• JCK-- Алюминиевый электролитический конденсатор SMD типа 1000h на 105C

Перекрестная ссылка: Nichicon, Rubycon, Panasonic, Sanyo, Элна ....

Время: около 6 ~ 7 недель
Learn more:http://www.jbcapacitors.com/

Specialized in manufacturing full series of Plastic Film Capacitors & Snap-in, Screw & Lug type Aluminum Electrolytic Capacitors. These products have been widely using in consumer's electronics, data processing, telecommunication, and industrial control's equipments. It is our commitment to offer our customers the best quality products with fast delivery and the best after sales services.

jb Capacitors has been producing film capacitors since 1980. We offer all kinds of film capacitors, polyester, polypropylene, polystyrene, epoxy dipped type, box type, X2, X1 class, high voltage film capacitors up to 2000VDC, besides winding technology and stacked technology are both available. Our film capacitors are famous for high quality, short lead time and very competitive prices.

jb Capacitors produces many kinds of motor starting capacitors, with high safety, high reliability, low dissipation factor and low temperature rise.

jb Capacitors has 30 years production experience on large can (snap in, screw, and lug type) aluminum electrolytic capacitors. We sell top quality with reasonable prices. Our SMD aluminum electrolytic capacitors 105'C and 85'C lead time is very short and prices are the best in the market. Monthly output for SMD electrolytic capacitors can meet 30 millions.
Learn more:http://www.jbcapacitors.com/