jbcapacitors blog

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.

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.

Ceq=C1+C2+……+Cn

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.

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 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

The capacitors are usable for radial manual insertion on PCB. The fixation on the board by double kinked leads prevents that the component jumps out of the PCB during transport.

The components with lead diameter of 0.6 mm are usable for being inserted in punched holes with nominal diameter of 0.8 mm and the components with lead diameter of 0.8 mm are usable for being inserted in punched holes with nominal diameter of 1.0 mm.

The pitch is specified on the top of the leads. After manufacturing, the products meet the specification. Although special care is taken to the packaging, deviations may occur due to transport.

JFJ series is mini box stacked metallized polyester film capacitors, with P:5mm.

JFE series is mini metallized polyester film capacitors with dipped, with P:5mm and 7.5mm.

Current markets are greatly lack of JFJ series mini box stacked mkt film capacitors. Our JFE series--mini mkt film capacitors can instead of JFJ series.

welcome to study our JFE--Mini metallized polyester film capacitors datasheet, and send your inquiry.

JFE--Mini metallized polyester film capacitors with P:5mm and P:7.5mm.

datasheet: http://www.jbcapacitors.com/pdf/JFE-Mini-Metallized-Polyester-Film-Capacitor.pdf

Lead time:7-9 weeks

To use this table, just read across. For example, 1uF is same 1,000nF or 1,000,000pF.

The unit of capacitance is the Farad (abbreviated to F) named after the British physicist Michael Faraday and is defined as a capacitor has the capacitance of One Farad when a charge of One Coulomb is stored on the plates by a voltage of One volt. Capacitance, C is always positive and has no negative units. However, the Farad is a very large unit of measurement to use on its own so sub-multiples of the Farad are generally used such as micro-farads, nano-farads and pico-farads, for example.

Microfarad (μF) 1μF = 1/1,000,000 = 0.000001 = 10-6 F
Nanofarad (nF) 1nF = 1/1,000,000,000 = 0.000000001 = 10-9 F
Picofarad (pF) 1pF = 1/1,000,000,000,000 = 0.000000000001 = 10-12 F

The capacitance of a parallel plate capacitor is proportional to the area, A of the plates and inversely proportional to their distance or separation, d (i.e. the dielectric thickness) giving us a value for capacitance of C = k( A/d ) where in a vacuum the value of the constant k is 8.84 x 10-12 F/m or 1/4.π.9 x 109, which is the permittivity of free space. Generally, the conductive plates of a capacitor are separated by air or some kind of insulating material or gel rather than the vacuum of free space.

Specially used for high quality audio products, also called audio film capacitors.
JFX--preminum metallized polypropylene film capacitors, Axial lead with large capacitance range, high quality, specially used for high quality audio products, also called audio film capacitors.