jb Capacitor Equivalent Diagram

C = nominal value of the capacitor

L = inductance (leads, metallization, winding)

ESR = equivalent series resistance (leads, metallization, metal spraying)

IR = insulation resistance (properties of the dielectric material)

∆C = capacitance change (depending on changes in temperature, DC voltage and/or frequency)

PR = dielectric polarization resistance

Cda = dielectric absorption

jb Capacitors -- Pulse operation

Capacitors loaded with pulses with fast rise or fall times (high dU/dt) will be exposed to high current pulses. In order not to overload the internal connections the current must be limited. The current limits for a specifc type are dependent upon:

  • Amplitude and form of the pulse
  • Rated voltage of the capacitor
  • Capacitance
  • Geometrical configuration of the winding

dU/dt = UR/(R x C)

UR = Rated voltage
R = Discharge resistor
C = Rated capacitance

jb Reliability of Capacitor

The reliability of a capacitor is mainly a function of:

  • The construction; dielectric material and its thickness
  • The manufacturing process
  • The application; electrical stress and temperature

Предлагаем со склада X2 MKP конденсаторы 0.022uF 100kpcs

Уважаемые господа

Мы занимаемся производством пленочных конденсаторов с 1980 года. Мы производим высококачественную продукцию и продаем по хорошим, конкурентоспособным ценам. Подскажите, пожалуйста, есть ли у вас запрос на пленочные конденсаторы?

Конденсаторы X2 (jb JFO X2 series)
0.022uF 275VAC X2 +/-10% P:15mm Bulk RoHS есть в наличии 100 000 шт.
100Kpcs stock in Russia; Кто первый пришел, тот первый и будет принят!

Конденсаторы PPS (jb JFP)

Вы работаете в отделе по закупкам? Не могли бы Вы дать мне e-mail Вашего менеджера по закупкам? Или перешлите пожалуйста ему моё письмо. Большое спасибо, желаю Вам удачи.

C уважением
Miss May
Sales Manager
jb capacitors--manufacturer for film capacitors and aluminum capacitors since 1980
Direct line: 86-769 8108 2280; (852) 2790 5091 Fax: (852) 8169 8283
Skype: jbcapacitors
MSN (No emails): jbcapacitors@hotmail.com
E-mail: may@jbcapacitors.com
Website: www.jbcapacitors.com

New Products of Plastic Film Capacitor --JFV

Jb Capacitor Manufactures X2 Metallized Polypropylene Film Capacitor ,JFV-X2 Metallized Polypropylene Film Capacitor is jb’s new products

Applications :

  • Ideal for use in line bypass, antenna coupling, across-the-line and spark killer circuits
  • Available for EMI filter
  • Switching power supply applications.


  • Non-inductive,(UL940V-0) plastic case sealed with epoxy resin,
  • Provides interference suppression with CE & TUV and UL approvals.
  • High dv/dt capabilities.

jb Capacitor Colour Code

A colour code was used on polyester capacitors for many years. It is now obsolete, but of course there are many still around. The colours should be read like the resistor code, the top three colour bands giving the value in pF. Ignore the 4th band (tolerance) and 5th band (voltage rating).

For example:brown, black, orange  means 10000pF = 10nF = 0.01µF.

Note that there are no gaps between the colour bands, so 2 identical bands actually appear as a wide band.

For example:wide red, yellow   means 220nF = 0.22µF.

jb For capacitors in parallel

Capacitors in a parallel configuration each have the same applied voltage. Their capacitances add up. Charge is apportioned among them by size. Using the schematic diagram to visualize parallel plates, it is apparent that each capacitor contributes to the total surface area.


jb Warning when use Aluminum Electrolytic Capacitors

The following rules should be observed when handling aluminum electrolytic capacitors:

Any escaping electrolyte should not come into contact with eyes or skin.

If electrolyte does come into contact with the skin, wash the affected parts immediately with running water. If the eyes are affected, rinse them for 10 minutes with plenty of water. If symptoms persist, seek medical treatment.


jb Electrical Characteristics and Fields of Application—SMD Capacitor

Basically the SMD series have the same electrical characteristics as the analogous through-hole WIMA capacitors. Compared to ceramic or tantalum dielectrics WIMA SMD capacitors have a number of other outstanding qualities:

  • favourable pulse rise time
  • low ESR
  • low dielectric absorption
  • available in high voltage series
  • large capacitance spectrum
  • stand up to high mechanical stress
  • good long-term stability

jb capacitors strongly recommend X2 Metallized polypropylene film capacitors ~~ JFV series

jb capacitors company produce X2 metallized polypropylene film capacitors--JFV series, with high quality and very short lead time & aggressive price.

Focus on overseas customers, JFV series X2 metallized polypropylene film capacitors is one of our best sellers, with safety approvals, widely used in powersupply,  power meters, white goods, ballast, lighting products, etc..

JFV--X2 Metallized polypropylene film capacitors,

cross Epcos B81130, Vishay MKP3382, Evox Rifa PHE840M, Phikor PCX2 337, Wima MP3 X2, Panasonic ECQU, Arcotronics(Kemet) R46, jb capacitors JFO series

Datasheet: http://www.jbcapacitors.com/pdf/JFV-X2-Metallized-Polypropylene-Film-Capacitor.pdf