WEE Technology Company Limited - WEE are Capacitors Specialist

WEET would like to share WCD and WCE Series Characteristics of chip smd MLCC multilayer ceramic capacitors:

1. The equivalent series resistance (ESR) is small and the impedance (z) is low.
2. The rated ripple current is large.
3. The varieties and specifications are complete.
4. Small size (withstand voltage 10V).
5. No polarity.

WEET WCD and WCE Series Advantages of chip surface mount MLCC multilayer ceramic capacitors

1. Due to the use of multi-layer dielectric stack structure, the inductance is very low at high frequency, with very low equivalent series resistance, so it can be used in high frequency and very high frequency circuit filtering without opponent.
2. No polarity, can be used in very high ripple circuits or AC circuits.
3. Using in low impedance circuits does not require a large derating.
4. No combustion and explosion during breakdown, high safety.Structure and working principle of chip multilayer ceramic capacitor: MLCC capacitor is simple in structure and consists of ceramic medium, inner electrode metal layer and outer electrode three layers.

The capacity formula of MLCC can be expressed as follows:

C: The capacitance is in F (farad), while the capacitance of MLCC is mainly in PF, NF, and F.
ε: Dielectric constant of insulation between electrodes, in farad / m.
K: Dielectric constant (depending on ceramic type)
A: Conductive area (different product size and printing area)
D: Thickness of dielectric layer (thickness of thin strip)
n: Layers (stack layers)

As we all know, a capacitor is a container that can store electricity. Its basic principle is to use two pieces of metal that are parallel to each other but not in contact with each other. In the middle, air or other materials are used as insulation. One piece of the two pieces of metal is connected to the positive pole of the battery, and the other is connected to the negative pole. The metal piece can store electricity. Compared with the common electrolytic capacitor, MLCC (multilayer ceramic capacitor) can be made into thin sheet (n stack layers are many), so MLCC can greatly improve the capacity of its capacitor under the same volume.

WEE Technology Company Limited - WEE are Capacitors Specialist

WEE Technology Company Limited - WEE are Capacitors Specialist
The application of MLCC Mono capacitor is mainly in LCD watch, electronic camera, micro instrument, medical instrument and electronic tuner, while the application of ceramic capacitor is mainly in high frequency oscillation circuit, bypass and decoupling.

Axial Lead MLCC Multilayer Ceramic Capacitors WCC Key Characteristics:

Capacitance:1pF - 1µF
Voltage:25VDC 50VDC 100VDC
Operation Temperature: NPO（-55°C~125°C）, X7R（-55°C~125°C）, Y5V（-25°C~85°C）

Axial Lead MLCC Multilayer Ceramic Capacitors Cross Reference: WCC Series 
NIC Series: NCMA
AVX(KYOCERA): SA Series
Kemet:C410~C440
Mallory :P
Vishay:A (Mono-Axial)

Radial Lead MLCC Multilayer Ceramic Capacitors Cross Reference: WCB Series 
NIC Series :NCM
AVX(KYOCERA): SR Series Skycap 
Kemet :C315~C350
Mallory :M 
Panasonic :ECU-S
Phillips : K, CN CW,CZ
Vishay/BC Components :K (Mono-Kap)
Murata : RPE 
Nippon chemi-con : THD serie
Syfer: 8111M, 8111N,8121M, 8121N,8131M, 8141M,8151M, 8161M,8171M

WEE Technology Company Limited - WEE are Capacitors Specialist

WEET WCB Series Radial MLCC Capacitors(Multilayer Ceramic Capacitors) MONO Caps Cross Reference and How to ready MLCC Code Meaning

The capacity unit of capacitance is: (F), (uF), (pF). Generally we don't use it as a unit, because it's too big. 
The conversion relationship between units is: 1F = 1000000uF, 1uF = 1000000pF. In use, unit: NF is often seen. 1uF=1000nF 1nF=1000pF

If the capacitance is directly marked as 0.47, it means the capacity is 47uF and the capacitance withstand voltage is 25V. 
The mathematical counting method is adopted: the standard value is 104, and the capacity is 10x100000pF = 0.1uF. If the standard value is 473, it is 47x1000pF = 0.047uF. (the following 4 and 3 are the power of 10). Another example: 332 = 33x100pF= 3300pF.
Therefore, we can identify the capacitance of Dushi capacitor 104 according to the identification method. 
The identity 104 represents a capacity size of 0.1uF.

F：法、mF：毫法、uF：微法、nF：纳法、pF：皮法

1法拉(F) = 1×10^6微法(μF)=1000000微法(μF)

1微法(μF)=1X10^3纳法(nF)

1微法(μF)= 1×10^6皮法(pF)=1000000皮法(pF)法拉是一种国际单位制导出单位。

1F=1 C/V=1 sAmkg

法拉（farad，符号为F）是国际单位制（SI）中电容的标准单位。简称“法”，单位符号是F。基于国际单位系统，1法拉等于秒的四次方安培的平方每千克每平方米。

WEE Technology Company Limited - WEE are Capacitors Specialist

Generally speaking, monolith Mono capacitor is larger than the general ceramic capacitor (10PF ~ 10uF), and has the advantages of large electric capacity, small volume, high reliability, stable capacitance, high temperature resistance, good insulation, low cost, etc., so it has been often used in our daily consumer electronics. Monolith capacitors can not only replace mica capacitors and paper Dielectric capacitors, but also some tantalum capacitors, which are widely used in small and subminiature electronic equipment (such as LCD watches and micro instruments).

WEET WCB Radial and Axial WCC MLCC MONO Multilayer Ceramic Capacitors Application:

This product is widely used in instruments, meters, barbecue ovens, televisions, drinking fountains, anion purifiers, tea trays and household electrical circuits for DC pulsation, pulse, and AC voltage reduction, especially for various types of energy-saving lamps and electronic rectifiers.

WEET WCB Radial and Axial WCC MLCC MONO Multilayer Ceramic Capacitors Features:

The main features are favorable price, small volume, large capacity, insulation resistance, excellent electrical performance, good reliability, small loss and good self-healing performance. It is sealed with epoxy resin, so it has excellent pressure resistance, heat resistance, shock resistance and moisture resistance. It is not easy to damage the capacitor surface during welding and cleaning.

WEE Technology Company Limited - WEE are Capacitors Specialist
In addition to the characteristics of the capacitor of "isolating direct current and alternating current", the single stone MLCC Mono capacitor also has the characteristics of small volume, large specific capacity, long service life, high reliability, suitable for surface installation, etc. 

With the rapid development of the world's electronic industry, as the basic component of the electronic industry, MLCC Capacitors(Multilayer Ceramic   Capacitors, Radial MONO Capacitors) capacitor also develops at an amazing speed, with an annual growth rate of 10 [%] ~ 15 [%]. The world's demand for single stone MONO capacitors is more than 200 billion, 70%] of which are from Japan, followed by Europe, the United States and Southeast Asia (including China). 

With the improvement of reliability and integration of chip capacity products, its application range is more and more wide, and it is widely used in various military and civil electronic machines and electronic equipment. Such as computer, telephone, program-controlled exchange, precise testing instrument, radar communication, etc. WEET is able to provide below Capacitors.

Ceramic is the dielectric material used in the manufacture of ceramic capacitors. Dielectrics are the insulating material between the plates of capacitors. This material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. Ceramic is an excellent dielectric material because it is a poor conductor of electricity while being an effective supporter of electrostatic fields.

Ceramic capacitors are manufactured using a tape casting process wherein thin layers of conductive electrodes are separated by a dielectric layer, and a kind of multi-layer “sandwich” is formed to create a ceramic capacitor with a very large surface area in a very compact size. Recently, the combination of nickel electrodes and the ability to cast very thin layers has allowed the capacitance range of ceramic capacitors to exceed more than 100μF in an 1812 package, using X5R dielectric material. With the ability to stack hundreds of layers to form a single high-density, high-capacitance multilayer ceramic capacitor, new application opportunities, that were previously the sole domain of tantalum capacitors, are now available for ceramic capacitors. One of the driving forces for the increased capacitance values in ceramic capacitors was the tantalum shortage of 2000.

Prior to the use of nickel electrode systems, Palladium (Pd) and Silver (Ag) were the most common electrode materials. This precious metal became cost prohibitive when making very high-capacitance, high-layer count ceramic capacitors. Palladium and silver are still widely used for ceramic capacitors with lower capacitance values.

There are now a number of ceramic materials and compositions that are used in ceramic capacitors. These include ceramic NPO (COG), ceramic X7R, ceramic X5R, and ceramic Y5V.

WEE Technology Company Limited - WEE are Capacitors Specialist

WEET High Voltage Ceramic Radial Type Disc Capacitors Features:
Operating Condition Range -25°C to +85°C.
Rated Working Voltage 1KV – 15KV DC.
Disc Classifications Y5P, Y5U, Y5V, Y5T, Y5R, SL, N750, UL, UJ,YL, NPO

High Voltage Ceramic Disc Capacitors are specially designed for high voltage applications:

• DC-DC converters, Voltage multipliers.
• High voltage power supplies, HV power supplies.
• Radio and TV receiver, Modems, Interfaces, TV and monitors.
• Other electrical appliances where high voltage is present.
• High voltage power supplies for x-ray sources and pulsed lasers: Baggage scanner, Medical x-ray, Industrial laser.
• Electrostatic coating, Arc spray and sputtering, Electrostatic cleaning power supplies, Ion generator power sources.