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.

WEE Technology Company Limited - WEE are Capacitors Specialist

WEET CD60 is aluminum electrolytic capacitor (large capacity, but short life); CD60, CBB60, CBB65 working voltage is generally about 450V for WEET AC motor commutation, operation capacitor is mainly used for air conditioning, washing machine, water pump, etc. 
CBB61 fan starting capacitor. CBB80 is a high-voltage (working voltage above 800V) capacitor, which is generally used in high-voltage circuits such as thyristor and rectifier overvoltage protection.

In particular, CBB65 and CD60 are vacuum impregnated with vegetable oil and mineral oil to improve the insulation, dielectric coefficient and other electrical properties of capacitors and moisture-proof. 
CBB60 and CBB65 are usually filled with a mixture of paraffin and vegetable oil. 
CBB61 is generally a square box type ABS plastic shell. 
CBB80 is generally PBT shell. The shape of the capacitor is not invariable, but can be changed according to the actual use.

CBB61 fan capacitor, CBB65 air conditioner capacitor, CBB60 motor capacitor are widely used in household, water pump, ultra-high pressure cleaning machine, mahjong machine, fan, single capacitor motor, washing machine and grade household appliances.

CBB60 AC motor capacitor and WEET CD60 starting capacitor are widely used in single-phase double capacitor motor, gasoline generator, diesel generator, three-phase single capacitor motor and other industrial appliances.

WEE Technology Company Limited - WEE are Capacitors Specialist

WEE Technology SMD E Cap including 2000 hours at 85°C SMD E Cap and 1000 hours at 105°C SMD E Cap.
Chip type, operating with wide temperature range -40~+105°C.
Designed for surface mounting on high density circuit board.
Tape and reel package is available for automatic insertion. 

WEET Aluminum Electrolytic Capacitors - SMD E Cap Common Dimension and Strong Items

WEE Technology Company Limited - WEE are Capacitors Specialist

The core of aluminum electrolytic capacitor is made of four layers of anode aluminum foil, electrolytic paper, cathode aluminum foil, electrolytic paper, etc. after the core contains electrolyte, it is sealed with aluminum shell and rubber cover to form an electrolytic capacitor. Compared with other types of capacitors, aluminum electrolytic capacitors have the following obvious characteristics in structure:

 (1) The working medium of aluminum electrolytic capacitor is to form a very thin layer of aluminum oxide (Al2O3) on the surface of aluminum foil by anodizing. The oxide medium layer and the anode of the capacitor are combined into a complete system, and they are interdependent and cannot be independent of each other. As we usually say, the electrode and dielectric of the capacitor are independent of each other.
 (2) The anode of aluminum electrolytic capacitor is the aluminum foil with Al2O3 dielectric layer on its surface. The cathode is not the negative foil we used to think, but the electrolyte of capacitor.
 (3) Negative foil plays the role of electrical lead-out in electrolytic capacitor, because the electrolyte as cathode of electrolytic capacitor can not be directly connected with the external circuit, it must form an electrical path through another metal electrode and other parts of the circuit.
 (4) The anode aluminum foil and cathode aluminum foil of aluminum electrolytic capacitor are usually corrosion aluminum foil. The actual surface area is much larger than its apparent surface area, which is also a reason why aluminum electrolytic capacitor usually has large capacitance. Due to the use of aluminum foil with many micro etched holes, liquid electrolyte is usually needed to make more effective use of its actual electrode area. 
 (5) As the dielectric oxide film of aluminum electrolytic capacitor is obtained by anodizing, and its thickness is directly proportional to the voltage applied by anodizing, therefore, in principle, the thickness of dielectric layer of aluminum electrolytic capacitor can be accurately controlled as a technical reference.

WEE Technology Company Limited - WEE are Capacitors Specialist

WEET微特贴片铝电解电容分为：液态和固态的两种。
一般情况下表面的印字油墨颜色不同。全是进口油墨，不易掉色和脱落。液态贴片铝电解电容的印字是黑色的，固态贴片铝电解电容印字的分别有红色和蓝色两种颜色。

WEET微特铝电解电容器的结构特点：
固态电容全称为：固态铝质电解电容。它与普通电容（即液态铝质电解电容）最大差别在于采用了不同的介电材料，液态铝电容介电材料为电解液，而固态电容的介电材料则为导电性高分子。

由于固态电容采用导电性高分子产品作为介电材料，该材料不会与氧化铝产生作用，通电后不致于发生爆炸的现象；同时它为固态产品，自然也就不存在由于受热膨胀导致爆裂的情况了。固态电容具备环保、低阻抗、高低温稳定、耐高纹波及高信赖度等优越特性，是目前电解电容产品中最高阶的产品。由于固态电容特性远优于液态铝电容，固态电容耐温达260度，且导电性、频率特性及寿命均佳，适用于低电压、高电流的应用，主要应用于数字产品如薄型DVD、投影机及工业计算机等，近年来也被电脑板卡产品广泛使用。其实贴片电容本质上与引线插件式电解电容并无分别，它们之间的差别仅仅在封装或者说是焊接工艺上面。

无论是插件还是贴片式的安装工艺，电容本身都是直立于PCB的，根本的区别方式是SMT贴片工艺安装的电容，有黑色的橡胶底座。SMT的好处主要在于生产方面，其自动化程度高，精度也高，在运输途中不像插件式那样容易受损。由于欧美工厂的机械成本低而人工比较贵，所以大部分倾向于SMT贴片制造。而国内工厂的人工较便宜，所以厂商更愿意使用插件式安装。

WEET Micro Chip Aluminum Electrolytic Capacitors are Divided into Two types: Liquid and Solid(Polymer Capacitors)

Generally, the ink color of the surface is different. All imported ink, not easy to fade and fall off. The lettering of the electrolytic capacitor of the liquid chip is black, and that of the electrolytic capacitor of the WEET solid chip polymer capacitor is red and blue.

WEET Structure Features of WEET Micro SMD Ecap Chip and Solid Chip Aluminum Electrolytic Capacitor:

The full name of solid-state capacitor: solid aluminum electrolytic capacitor. The biggest difference between them is that they use different dielectric materials. The dielectric material of liquid aluminum capacitor is electrolyte, while the dielectric material of solid capacitance is conductive polymer.

As the solid-state capacitor uses conductive polymer product as the dielectric material, the material will not interact with alumina and will not explode after being electrified; at the same time, it is a solid-state product, so there will be no burst due to thermal expansion. Solid state capacitor has the advantages of environmental protection, low impedance, high and low temperature stability, high ripple resistance and high reliability. It is the highest level product in the current electrolytic capacitor products. As the solid-state capacitance is far superior to the liquid aluminum capacitance, and the solid-state capacitance has a temperature resistance of 260 degrees, good conductivity, frequency characteristics and service life. It is suitable for low voltage and high current applications, mainly used in digital products such as thin DVD, projector and industrial computer, etc., and also widely used in computer board products in recent years. In fact, the chip capacitor is essentially the same as the lead plug-in electrolytic capacitor, and the difference between them is only in the packaging or welding process.

No matter the installation process of plug-in or chip type, the capacitor itself is upright on PCB. The fundamental difference is that the capacitor installed by SMT chip process has a black rubber base. The advantage of SMT is mainly in production. It has high automation and precision. It is not easy to be damaged as plug-in type in transportation. Due to the low cost of machinery and expensive labor in European and American factories, most of them tend to SMT chip manufacturing. However, the labor of domestic factories is cheaper, so manufacturers prefer to use plug-in installation.