jbcapacitors blog

jb capacitors company is very strong on Aluminum electrolytic capacitors, including snap-in, screw type and lug type.

Snap-in Aluminum Electrolytic Capacitors is widely used on power supply. If the end product is industrial motor, some customer may requires to add a mica sheet of plastic layer or other non-flammable material between the Aluminum electrolytic body and PCB. As we know, the motor has vibrations, and it keeps running 24 hours, so that the capacitor will be very hot. The piece of plastic layer is used as insulation to prevent the capacitor from shorting itself.

jb capacitors company strongly recommend:

JFQ-Box type double sided metallized polypropylene film capacitor

This type capacitors capacitance range is wide, voltage is up to 2000V, can cross to many high end European brands:

Capacitance Range: 0.00022uF ~ 3.9uF
Rated Voltage: 250V, 400V, 630V, 1000V, 1400/1600V, 2000V.DC
Lead Spacing: 7.5mm, 10mm, 15mm, 22.5mm, 27.5mm

Cross Reference:
Arcotronics(Kemet) : R76 series
EVOX RIFA: PHE450 series
Vishay: MMKP 383 Series
Wima: MKP 10,
Philkor: PCMP384 series etc...

Applications: electronic ballast, frenquency control, lighting etc...

Polyester films, are clearer and a higher quality than lower grade films, which tend to be foggy. Premium films also endure extreme environments and severe stress conditions more favorably. Films with higher polyester content are more rigid and feel thicker than films with more adhesive content.

Polypropylene film is softer than polyester, but still has excellent clarity. These films have strong chemical resistence, good color stability over printed sheets, and good elasticity which allows the film to lay extremely flat. Due to its softness and flatness, polypropylene films are most often used in single-sided laminating.

Symbol:T
Unit:(s)
When a capacitor discharges its charge throught a resistor, the charge of the capacitor decreases with time. The decreasing charge follows an exponential decay curve.

A super capacitor is also known as a double-layer capacitor. It polarizes an electrolytic solution to store energy electro statically. Though it is an electrochemical device, no chemical reactions are involved in its energy storage mechanism. This mechanism is highly reversible, and allows the ultra capacitor to be charged and discharged hundreds of thousands of times.

A super capacitor can be viewed as two non reactive porous plates, or collectors, suspended within an electrolyte, with a voltage potential applied across the collectors. In an individual super capacitor cell, the applied potential on the positive electrode attracts the negative ions in the electrolyte, while the potential on the negative electrode attracts the positive ions. A dielectric separator between the two electrodes prevents the charge from moving between the two electrodes.

A super capacitor is also known as a double-layer capacitor. It polarizes an electrolytic solution to store energy electro statically. Though it is an electrochemical device, no chemical reactions are involved in its energy storage mechanism. This mechanism is highly reversible, and allows the ultra capacitor to be charged and discharged hundreds of thousands of times.

A super capacitor can be viewed as two non reactive porous plates, or collectors, suspended within an electrolyte, with a voltage potential applied across the collectors. In an individual supercapacitor cell, the applied potential on the positive electrode attracts the negative ions in the electrolyte, while the potential on the negative electrode attracts the positive ions. A dielectric separator between the two electrodes prevents the charge from moving between the two electrodes.

Tape and Reel is a process of packing surface mount devices (SMD's) by loading them into individual pockets comprising what is known as a pocket tape or carrier tape. The carrier tape is wound around a reel for convenient handling and transport. The reel is enclosed in a reel box before it is finally shipped to the customer.

A Tape-and-Reel holds hundreds-to-thousands of surface mount devices. This saves in labor and will further reduce manufacturing costs for automated circuit board assembly.

jb capacitors company manufactures and markets SMD Aluminum Electrolytic capacitors. They are both with tape-and-reel package.

JCS - 2000H at 85°C SMD Aluminum Electrolytic Capacitors

JCK- 1000H at 105°C SMD Aluminum Electrolytic Capacitors

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。

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.

Several capacitors in parallel.

For capacitors in series

Connected in series, the schematic diagram reveals that the separation distance, not the plate area, adds up. The capacitors each store instantaneous charge build-up equal to that of every other capacitor in the series. The total voltage difference from end to end is apportioned to each capacitor according to the inverse of its capacitance.

Several capacitors in series.

The entire series acts as a capacitorsmaller than any of its components.

Capacitors are combined in series to achieve a higher working voltage, for example for smoothing a high voltage power supply. The voltage ratings, which are based on plate separation, add up. In such an application, several series connections may in turn be connected in parallel, forming a matrix. The goal is to maximize the energy storage utility of each capacitor without overloading it.

For more products information please check: http://www.jbcapacitors.com/

CE word is from the French "Communate Europpene" from the initials, is the meaning of the European Community。"CE" mark is a safety certification mark, the manufacturer is considered open and the passport to enter the European market.

UL is in English Test by insurance Underwriter Laboratories Inc. UL secuity testing is the most authoritative, but also engages im community safety testing and identification of the larger non-governmental organizations.

JFV-X2 Metallized Polypropylene Film Capacitor, is not only with above two approvals(CE& UL), but also with TUV approvals. That must can help to promote this capacitor in your market.

Do you use the X2 safety capacitors ? For more info, welcome to visit "jbcapacitors" production lines:  http://www.jbcapacitors.com/Plastic-Film-Capacitors/