About Capacitors

jb Summary of Capacitor Types

0 comments 2010-11-22 14:56:55 views

The table below gives and overview of the main characteristics of the various types of capacitor.

Capacitor types	Capacitance range	Accuracy	Temperature stability	Leakage	Comments
Electrolytic	0.1 µF - ~1 F	V poor	V poor	Poor	Polarised capacitor - widely used in power supplies for smoothing, and bypass where accuracy, etc is not required.
Ceramic	10 pF - 1 µF	Variable	Variable	Average	Exact performanceof capacitor depends to a large extent on the ceramic used.
Tantalum	0.1 µF - 500 µF	Poor	Poor	Poor	Polarised capacitor - very high capacitance density.
Silver mica	1 pF - 3000 pF	Good	Good	Good	Rather expensive and large - not widely used these days except when small value accurate capacitors are needed.
Polyester (Mylar)	0.001 µF - 50 µF	Good	Poor	Good	Inexpensive, and popular for non-demanding applications.
Polystyrene	10 pF - 1 µF	V good	Good	V good	High quality, often used in filters and the like where accuracy is needed.
Polycarbonate	100 pF - 20 µF	V good	V good	Good	Used in many high tolerance and hash environmental conditions. Supply now restricted.
Polypropylene	100pF - 50 µF	V good	Good	V good	High performance and low dielectric absorption.
Teflon	100 pF - 1 µF	V good	V v good	V v good	High performance - lowest dielectric absorption.
Glass	10 pF - 1000 pF	Good	Good	V good	Excellent for very harsh environments while offering good stability. Very expensive.
Porcelain	100 pF - 0.1 µF	Good	Good	Good	Good long term stability
Vacuum and air	1 pF - 10 000 pF				Often used as variable capacitors in transmitters as a result of their very high voltage capability.

Welcome to visit our jb capacitors website http://www.jbcapacitors.com/ to search your interestedcapacitors.

Units of capacitance

0 comments 2010-11-18 16:9:48 views

It is necessary to quantify a capacitor in terms of its ability to store charge. The basic unit of capacitance is the Farad, named after Michael Faraday.

The definition of A Farad is: A capacitor has a capacitance of one Farad when a potential difference of one volt will charge it with one coulomb of electricity (i.e. one Amp for one second).

In view of the fact that a capacitor with a capacitance of one Farad is too large for most electronics applications, components with much smaller values of capacitance are normally used. Three prefixes (multipliers) are used, µ (micro), n (nano) and p (pico):

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

About Capacitors

jb motor starting capacitors

0 comments 2010-11-16 20:29:1 views

Start capacitors briefly increase motor starting torque and allow a motor to be cycled on and off rapidly. Start capacitors have ratings above 70 microfarads (µF), with three major voltage classifications: 125 V, 250 V, and 330 V. A start capacitor stays energized long enough to rapidly bring the motor to 3/4 of full speed and is then taken out of the circuit, such as by a centrifugal switch that releases when rotating at or around that speed.

Examples of motor capacitors are: a 35 µF, at 370 V, run capacitor, or an 88–108 µF at 250 V start capacitor.

jb have the motor starting capacitors of capacitance range 1uF~20uF(JFS-A~D、JFS-5~7、JFS-9) 1uF~100uF(JFS-11~18).

About Capacitors

What is Capacitance ?

0 comments 2010-11-13 17:18:17 views

The capacitance of certain capacitors decreases as the component ages. In ceramic capacitors, this is caused by degradation of the dielectric. The type of dielectric and the ambient operating and storage temperatures are the most significant aging factors, while the operating voltage has a smaller effect.

The aging process may be reversed by heating the component above the Curie point. Aging is fastest near the beginning of life of the component, and the device stabilizes over time,electrolytic capacitors age as the electrolyte evaporates. In contrast with ceramic capacitors, this occurs towards the end of life of the component.

Our jb capacitors has various capacitance.Such as our JFA-Mylar Polyester Film Capacitors, capacitance range from 0.001 to 0.47μF.

About Capacitors

Electronica 2010

0 comments 2010-11-11 13:15:40 views

JB Capacitors Company exhibit in Electronica Munich/Germany from Nov.9 to 12th, welcome to visit our booth number B6.437/10.

We prepared some samples, catalogues & green bags for you, please visit us to get them.

We're looking forward to meeting you & discussing business details.

About Capacitors

jb Capacitors Company Exhibit in 2010 Electronics Asia HK Fair

0 comments 2010-10-21 17:13:34 views

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.

jbcapacitors

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

About Capacitors jb 2010 Electronics Asia HK Fair JFA JFB JFD JFG plastic film capacitors Aluminum Electrolytic Capacitors

jb Folien-Kondensatoren & Aluminum-Elektrolyt-Kondensatoren

0 comments 2010-7-29 0:25:22 views

jb Capacitors Company ist ein professioneller Hersteller von Folien-und Aluminium-Elektrolyt-Kondensatoren seit 1980. Wir verkaufen zu sehr günstigen Preisen Top-Qualität aus China.

Wir arbeiten jetzt weltweit mit Bauelemente-Distributoren und Herstellern zusammen. Diese liefern Lautsprecher, Netzteile, Geräte der Meß-und Regeltechnik, Leiterplatten, Energie-Spar-Lampen, Entladungslampen, Verstärker, Schweißmaschinen, Audio-Komponenten, Sicherheitsbeleuchtung, etc...

Unsere Hauptprodukte haben wir nachstehend aufgelistet:

Folien-Kondensatoren: Polyester, Polypropylen, Polystyren Folien-Kondensatoren.
Aluminum-Elektrolyt-Kondensatoren: SMD, Snap-In, Schraub-und Lötanschluss-Aluminum-Elektrolyt-Kondensatoren

About Capacitors jb Capacitors Company Aluminum Foil Axial Metallized Polyester Film Capacitor AC Motor Running Film Capacitor Interference Suppression Film Capacitors Axial leaded film capacitors audio film capacitor Arcotronics EMI/RFI Film Capacitors

jb Feature Film Capacitor

0 comments 2010-7-22 22:31:22 views

薄膜电容器(MKT,MKP,CL11,CL21,Interference Suppression Film Capacitor)具有很多优良的特性，是一种性能优秀的电容器, 它的主要等性如下:

无极性，绝缘阻抗很高，频率特性优异(频率响应宽广)，而且介质损失很小。基于以上的优点, 所以薄膜电容器(MKT,MKP,CL11,CL21,Interference Suppression Film Capacitor)被大量使用在模拟电路上。尤其是在信号交连的部份，必须使用频率特性良好，介质损失极低的电容器，方能确保信号在传送时，不致有太大的失真情形发生。

在所有的塑料薄膜电容(MKT,MKP,CL11,CL21,Interference Suppression Film Capacitor)当中，又以聚丙烯电容(MKP,Interference Suppression Film Capacitor)和聚苯乙烯电容(Polystyrene Capacitor)的特性
最为显著。通常的薄膜电容器(MKT,MKP,CL11,CL21,Interference Suppression Film Capacitor)其制法是将铝等金属箔当成电极和塑料薄膜重迭后卷绕在一起制成。但是薄膜电容器(MKT,MKP,CL11,CL21,Interference Suppression Film Capacitor)又有一种制造法，叫做金属化薄膜(Metallized Film)，其制法是在塑料薄膜(Plastic Film)上以真空蒸镀上一层很薄的金属以做为电极。

About Capacitors jb Capacitors Company Box type Metallized polypropylene film capacitors CBB61 Motor Capacitor Metallized Polyester Film Capacitors MKT film capacitors X2 Film Capacitors

jb Aluminum Electrolytic Capacitors Use Instructions

0 comments 2010-7-9 20:8:42 views

Aluminum electrolytic capacitors may cause an explosion, fire, or other serious trouble if not used under specified operating conditions. Please familiarize yourself with the instructions given below before using these capacitors Operating temperature and ripple current.

1. Keep the operating temperature and ripple current in specified ranges. Applying an excessive current to a capacitor will overheat it, resulting perhaps in short-circuit, ignition, or other fatal fault.
2. A capacitor is also a heating component itself. Please be on guard, remembering that it heats up the inside of the equipment. Run the unit under normal conditions and check the temperature of the surroundings of the capacitor.
3. The permissible ripple current tends to decline with a rise in the atmosphere temperature (the temperature of the surroundings of the capacitor). Consider a permissible ripple current at the maximum predictable atmospheric temperature. Allow also for the changes in frequency.

Applied voltage and connections

1. Capacitors have polarity. Applying a reverse voltage or AC voltage to a capacitor may cause a fire or other fatal fault.
2. Use a bipolar capacitor for circuits whose polarity reverses. However, in this case, like any other case,refrain from using such a capacitor in AC circuit.
3. When an AC component is superimposed on a DC voltage, prevent the peak value from exceeding the rated voltage. An excessive voltage may cause a short-circuit, fire, or other fatal fault.
4. When connecting more than one capacitor in parallel, consider the resistance of the wiring. Establish the connections so that the wiring resistance will be equal at every capacitor.
5. When more than one capacitor is connected in series, all capacitors must be of identical ratings. Then connect the balancing resistors in parallel. At that time, design the circuit so that the voltage levels applied to all capacitors become equal.Check that the voltages applied to capacitors do not exceed a rated voltage.
6. Do not use such a capacitor for a circuit that is repeatedly charged and discharged quickly. If you are to use such a capacitor for a welding unit or for other charging and discharging purposes, use a capacitor designed on a separate basis.
7. Even slow recharging may shorten the service life of a capacitor if its voltage changes greatly. Check it sufficiently as installed on a larger machine or consult Capsun.

Capacitor insulation

1. Do not connect the blank terminal (reinforcing terminal) of a multi-terminal (three- or four-terminal) product of the snap-in type to another circuit. It may cause a short circuit.
2. The external sleeve of the snap-in type has no insulator. If you need a sleeve with an insulator, consult Capsun.
3. Ensure a completely open circuit between the case and the cathode terminal, and between the anode terminal and circuit pattern

Operating conditions

1. A splash of water, salty water, oil or other electrically conductive liquid on a capacitor or using a capacitor when it has dew on it may cause a breakdown. Oil on the rubber sealing or safety vent may cause a decline in airtightness. Do not use a capacitor with liquid on it.
2. Do not use or leave a capacitor in a place where there is a hydrogen sulfide, nitrous acid, sulfurous acid, chlorine, bromine, or other halide compound gas, ammonia, or other hazardous gas. The ingress of any of the aforementioned gases into a capacitor may corrode it. Avoid fumigating and spraying an insecticide as well.
3. Do not use or leave a capacitor in a place exposed to ozone, ultraviolet ray, or radiation.
4. Do not use a capacitor in a place where vibration or impact is excessive.

Installa tion Before installaton

1. Do not reverse the polarity. Do not use a capacitor to which a reverse voltage is applied, even if it looks problem-free. It must be greatly damaged.
2. Do not tighten the curled part (case sealed part) with a mounting fitting or otherwise stress it. Any such practice may cause a liquid leak or sleeve breakage.
3. Dropping or otherwise impacting a capacitor may result in a decline in its electric performance,causing a breakdown. Therefore do not cause an impact on it.
4. Do not reuse a capacitor which has been installed on a machine and energized. No capacitor can be reused except for those removed to measure their electric performance for a periodic checkup.

Method of installation

1. Do not make the safety vent (cap side) of a screw terminal type face downwards. The safety vent may let the electrolyte or compound leak.
2. Do not install a wiring or circuit pattern near the safety vent. When the safety vent is activated, the electrolyte may jet out, resulting in a fire or other secondary accident.
3. Avoid installing a heating part around a capacitor or in back of a printed wiring board (beneath the capacitor).
4. Do not hamper the activation of the safety vent. Above the safety vent (where a screw terminal type is installed on the terminal side, or snap-in type on the case bottom), allow for the following clearances.

About Capacitors jb jb Aluminum Electrolytic Capacitors jb Audio Capacitor Shock Offer jb Film Capacitors Aluminum Foil amplifier about Easter Axial Metallized Polyester & Polypropylene Film Capacitor Features capacitance value capacitor marking mean CE Approval Class X2 Film Capacitors Flim Capacitor Folie Kondensatoren horror films Household Equipment

jb Capacitors Company X2 Safety Capacitor Stock Notice

0 comments 2010-7-2 11:26:41 views

jb capacitors produce MKT, MKP, X2 safety metallized polypropylene capacitors since 1980.

We are going to stock some X2 capacitors, and provide better delivery support to you. Do you have interest ?

Could you please send us the X2 capacitors requirements ? Then we will keep stock for you. You are welcome to request samples and quotation from us too.

Datasheet link : http://www.jbcapacitors.com/pdf/JFO-X2-Metallized-Polypropylene-Film-Capacitor-(4-approvals).pdf

I need below information, please help reply me:

1) Description or Part number of X2 film capacitors (can give Arcotronics, Epcos, Panasonic....X2 capacitors part number)
2) Quantity per shipment, per month or per year.
3) Order frequency

About Capacitors jb jb Capacitors Company jb best capacitor for audio Class X2 Radial MKP 310 VAC - Standard Across the Line Interference Suppression Film Capacitors Axial Metallized polyetser film capacitors film capacitor excellent noise reduction

jbcapacitors blog

jb Summary of Capacitor Types

Units of capacitance

jb motor starting capacitors

What is Capacitance ?

Electronica 2010

jb Capacitors Company Exhibit in 2010 Electronics Asia HK Fair

jb Folien-Kondensatoren & Aluminum-Elektrolyt-Kondensatoren

jb Feature Film Capacitor

jb Aluminum Electrolytic Capacitors Use Instructions

jb Capacitors Company X2 Safety Capacitor Stock Notice

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