jbcapacitors blog

X2 capacitor is same as Safety capacitor, also called Interference Suppression MKP film capacitors.  X2 capacitors indicate which grade the capacitors can withstand the voltage with normal working.

Have safety approvals, like UL, TUV, CE, VDE approvals.  JFV X2 film capacitors is jb capacitors best seller in market, with quite good quality and shortest lead time. Pls. visit our website www.jbcapacitors.com and contact us for more detail information.

Below is stock information for X2 Film Capacitors.

• Brand: jb Capacitors Company.
• Products: JFV series--X2 Metallized Polypropylene Film Capacitors
• Approvals: TUV, CE, UL
• Voltage: 275VAC
• Tolerance: +/-10%
• Pitch size: 15mm
• Part Numbers: JFV0A1104K150000B & JFV0A1224K150000B
• Cross Reference: Vishay MKP3382, Kemet Arcotronics R46, Wima MP3, Epcos B81130, Pilkor PCX2 337

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

安规电容是指用于这样的场合：即电容器失效后，不会导致电击，不危及人身安全.它包括了X电容和Y电容。

X电容是跨接在电力线两线 (L-N) 之间的电容，一般选用金属化薄膜电容；Y电容是分别跨接在电力线两线和地之间 (L-E, N-E) 的电容，一般是成对出现。

基于漏电流的限制，Y电容值不能太大，一般X电容是uF级，Y电容是nF级。X电容抑制差模干扰，Y电容抑制共模干扰。

Y电容的电容量必须受到限制，从而达到控制在额定频率及额定电压作用下，流过它的漏电流的大小和对系统EMC性能影响的目的。

GJB151规定Y电容的容量应不大于0.1uF。Y电容除符合相应的电网电压耐压外，还要求这种电容器在电气和机械性能方面有足够的安全余量，避免在极端恶劣环境条件下出现击穿短路现象，

Y电容的耐压性能对保护人身安全具有重要意义。

1.)Capacitors Breakdown voltage

Main article: Breakdown voltage

The breakdown voltage of the dielectric limits the power density of capacitors. For a particular dielectric, the breakdown voltage is proportional to the thickness of the dielectric.

If a manufacturer makes a new capacitor with the same dielectric as some old capacitor, but with half the thickness of the dielectric, the new capacitor has half the breakdown voltage of the old capacitor.

Because the plates are closer together, the manufacturer can put twice the parallel-plate area inside the new capacitor and still fit it in the same volume (capacitor size) as the old capacitor. Since the capacitance of a parallel-plate capacitor is given by: 

this new capacitor has 4 times the capacitance as the old capacitor.

Since the energy stored in a capacitor is given by: 

This new capacitor has the same maximum energy density as the old capacitor.

The energy density depends only on the dielectric. Making a few thick layers of dielectric (which can support a high voltage, but results in a low capacitance), or making many very thin layers of dielectric (which results in a low breakdown voltage, but a higher capacitance) has no effect on the energy density.

2.) Standard values

Before 1960 electronic components values were not standardised. The more common, but not the only, values for capacitors were 1.0, 1.5, 2.0, 3.0, 5.0, 6.0, and 8.0 as base numbers multiplied by some negative or positive power of ten. Values of 0.001 µF and above were stated in microfarads (µF, or often mF); lower values were stated in micro-microfarads (µµF, now called picofarads, pF).

In the late 1960s a standardized set of geometrically increasing preferred values was introduced. According to the number of values per decade, these were called the E3, E6, E12, etc. series

In many applications capacitors need not be specified to tight tolerance (they often need only to exceed a certain value); this is particularly true for electrolytic capacitors, which are often used for filtering and bypassing. Consequently capacitors, particularly electrolytics, often have a tolerance range of ±20% and need to be available only within E6 (or E3) series values.

 

Au département d'achat ou de vente:
Comment allez-vous ?

Maintenant nous sommes foyer sur favoriser notre série de JFV ! Cette série est pour le marché d'oversea, et employé couramment en ballasts électroniques, ventilateurs, éclairage, mètre de puissance, fournisseurs de puissance….application partout dans le monde. Achetez-vous des condensateurs du film X2 ? Bienvenue pour nous envoyer l'enquête et pour vérifier nos prix. Merci.

Série de JFV--Condensateurs de film de polypropylène métallisés par X2 
Approbation de sûreté : Approbations de la CE et de TUV et d'UL.
Chaîne de capacité : 1000pF~2.2uF
Correspondance: Panasonic ECQU, Vishay MKP3382 275Vac, Wima MP3, Arcotronics R46, Pilkor PCX2 337,Epcos B81130, Evox Rifa PHE840M. 
Délai d'exécution court : environ 5~7 semaines
Datasheet: http://www.jbcapacitors.com/pdf/JFV-X2-Metallized-Polypropylene-Film-Capacitor.pdf