jb Summary of Capacitor Types

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

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

jb motor starting capacitors

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.

JFS - Motor Starting Capacitor

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).

What is Capacitance ?

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.

Electronica 2010

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.

jb Capacitors Company Exhibit in 2010 Electronics Asia HK Fair

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.

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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

JB Cross Reference for Film Capacitor

Part Number
JB Part#
CL21
JFB--Metallized Polyester Film Capacitor
CL23B
JFJ--Mini Box Stacked Metallized Polyester Film Capacitor
CL23
JFD--Box Type Metallized Polyester Film Capacitor
CL21X
JFE--Mini Metallized Polyester Film Capacitor
CL20
JFG--Axial Metallized Polyester & Polypropylene Film Capacitor - Round & Flat Oval
CL11
JFA--Mylar Polyester Film Capacitor
X2 Interference suppression
JFO--X2 Metallized Polypropylene Film Capacitor - 4 Approvals.
JFN--X2 Metallized Polypropylene Film Capacitor - 8 Approvals.

jb capacitors is our favorite suppliers

My name is Peter Sivak. I am electrotechnical engineer. I work as head production. Our company has many suppliers of many components include electrotechnical materials.

As you know, the production us very sensitive for quality ,delivery time and dependent of flexibility suppliers and last but not least the price. The jb capacitors is our favorite suppliers,

because they fulfill the previous condition.

The jb capacitors company really want keep a promise, or the request of customers. Their dealers are very kind , helpful and friendly. It is good advance how to be successful.

It will be very good if every of our suppliers will be as good as jb.

Mylar Polyester Film Capacitors --JFA (CL11)

jb capacitors produce film capacitors since 1980. Have a very good reputation in use with consumer&industrial electronics.

Our JFA Mylar polyester film capacitors (CL11) are widely used for energy saving lamps (CFL), ballasts.. many lighting products.

JFA series Mylar polyester film capacitors, CL11 series, many customers also called green capacitors, with very small size, low price.

jb capacitors company offer very short lead time for mylar film capacitors.

JFA--Mylar polyester film capacitors (CL11)

Capacitance range from 0.001uF ~0.47uF

Datasheet: http://www.jbcapacitors.com/pdf/JFA-Mylar-Polyester-Film-Capacitor.pdf

JFA - Mylar Polyester Film Capacitor

jb Film Capacitors Part Numbers--Russia

Polyester film capacitors:
K73-11, K73-15A, K73-16, K73-16V, K73-17, K73-17V, K73-21, K73-21B, K73-21G, K73-24, K73-24B, K73-5, K73-9, K73-9B, K73P-2, K73P-3, K73P-4, K76P-1,

Polypropylene capacitors:
K78-2

Polystyrene film capacitors:
K71-4, K71-5, K71-7V, PM1-1

Large Can Electrolytic capacitors:
K50-17, K50-37, K50-74, K50-80, K50-84, K50-86