jb Capacitors Motor Starting Capacitor - JFS

jb A.C motor-start capacitors are electrochemical devices consisting of compactly wound aluminum foil separated by layers of paper, which are impregnated with a conducting electrolyte. Etching of the foil prior to formation and winding increases both the effective foil surface area and the capacitance per unit volume of the finished capacitor. The entire assembly is housed in a case of moisture and oil resistant molded plastic. These capacitors are rated for operation in ambient temperatures from -40°C to +65°C and at a frequency of 50Hz to 60Hz.

These capacitors are designed for motor starting and other intermittent duty AC applications. They are non-polarized and are normally designed with dual quick terminals. These terminals allow for the easy attachment of a bleeder resistor(usually 15K ohm at 2 watt). This saves relay switch contacts and capacitor, particularly in capacitor start-run applications. The quick connect terminals also eliminate the need for soldering.

A motor capacitor, such as a start capacitor or run capacitor, including a dual run capacitor, is an electrical capacitor that alters the current to one or more windings of a single phase AC induction motor to create a rotating magnetic field. It is used in air conditioners, hot tub/jacuzzi spa pumps, or forced air heat furnaces for example. A round dual run capacitor is used in some air conditioner compressor units, to boost both the fan and compressor motors.


jb Ammo/ Tape Pack for Mini Box Stacked 5mm Metallized Polyester Film Capacitors

Dear jb Customer,

5mm mini box stacked metallized polyester film capacitors is very popular on markets, for wide application in automotive, lighting, power supply projects, etc.
it is specially series with stacked technology, not wound technology, with very small and standard size. with high DV/DT data. very high quality.
jb capacitors comapny, as professional manufacturer on film capacitors industry since 1980, offer below JFJ series mini box stacked metallized polyester film capacitors. not only with good quality goods, also with good quality Ammo package. 
JFJ--5mm Mini box stacked metallized polyester film capacitors
Rated Voltage:   63V, 100V, 250V, 400V, 500V, 630V
Capacitance Tolerance  ±5%(J), ±10%(K), ±20%(M)
High DV/DT: 
  If the working voltage (U) is lower than the rated voltage (UR), the capacitor can be worked at a higher dv/dt.
In this case, the maximum allowed dv/dt is obtain by multiplying the right value with UR/U.

Datasheet PDF link : http://www.jbcapacitors.com/pdf/JFJ-Mini-Box-Stacked-Metallized-Polyester-Film-Capacitor.pdf
Cross Guide:  jb capacitors JFJ series;  Kemet Arcotronics R82 series;  Epcos B32529 series;  Vishay MKT370 series.

jb What is a Capacitor ?

A capacitor is a small device that can be charged up with electrical energy, store it and then release it. Just like a rechargeable battery. But unlike a battery, it does not use a chemical reaction and it can only hold a very small charge. A very large capacitor can only light up an LED for a few seconds. They come in many shapes and sizes and a few are shown below. The bigger the capacitor, the more charge it will hold. Capacitor is made from two metal plates or metal foils separated by an insulator called a Dielectric material.

The Dielectric materials can be made from Ceramic, Mica, Polypropylene, Polyester, Electrolytic, Tantalum and even air.

The larger capacitors look like tubes, this is because the metal foil plates are rolled up with an insulating dielectric material sandwiched in between.

The value of capacitance is determined by

1.The size of the plates,

2.The distance between them,

3.The type of dilectric material used.

jb capacitors company are professional in all kinds of capacitors ,such as Plastic Film Capacitors ,Aluminum Electrolytic Capacitors,SMD Aluminum Electrolytic Capacitors ,Metallized Polyester CapacitorsMetallized Polypropylene CapacitorsSMD E Cap and etc.Any questions ,please don't hestate to contact us.

jb capacitors company, just your best choice!

Glass capacitor construction

The construction of glass dielectric capacitors is relatively straightforward to understand. The capacitor consists of three basic elements: the glass dielectric, aluminium electrodes and the encapsulation. However the assembly of the glass capacitors is undertaken in a manner that ensures the required performance is obtained.

As the capacitance between two plates is not always sufficient to provide the required level of performance, the majority of capacitors use a multiplayer construction to provide several layers of plates with interspersed dielectric to give the required capacitance.

Although the glass plates are always flat, and tubular forms of construction are not applicable, the glass capacitors are usually available with leads emanating in either a radial or axial form. Essentially the leads either exit the encapsulation at the side or the end.http://www.jbcapacitors.com/