X2 safety capacitors are commonly used in power circuits to suppress electromagnetic interference. They are installed between the live and neutral wires of the power supply to filter out high-frequency noise, ensure the stability of the power supply, and reduce the potential impact of electromagnetic interference on other electronic devices.
In fact, X2 safety capacitors can be further divided into many types. Taking the WFC-A series X2 safety capacitors from WEET as an example, they can be divided into suppression of power electromagnetic interference type, PD fast charging dedicated type, resistance capacitance voltage reduction dedicated type, double 85 type, moisture-proof type, etc.
In what occasions are moisture-proof X2 safety capacitors used?
This X2 capacitor is suitable for capacitor voltage reduction circuits connected in series with power sources, such as smart meters, LED power supply modules, and other harsh application environments.
What are the characteristics of moisture-proof X2 safety capacitors?
1. The capacity attenuation is extremely small.
Compared with the anti-interference X2 capacitor, our moisture-proof X2 capacitor has less capacity attenuation and can be used in harsh environments such as high temperature and high humidity for a long time with excellent capacity stability.
The moisture-proof X2 capacitor was designed with long-term stability in mind, with minimal capacity decay and the ability to provide stable performance throughout the entire lifespan of the device.
2. Capacitors have self-healing properties and can withstand surge voltage impacts.
3. Excellent flame retardancy and better high-temperature resistance.
4. Better high temperature resistance. The moisture-proof X2 safety capacitor can operate stably in high temperature environments, and its design considers performance maintenance at high temperatures to ensure that there will be no performance degradation or capacity degradation under long-term high temperature loads.
5. Better moisture resistance.
Due to the fact that some electronic devices may be used in humid environments, these capacitors typically have good moisture resistance and can maintain stable electrical characteristics in high humidity environments.
WEET Characteristics of THB series X2 safety capacitors Cross TDK B3293 - X2 Heavy Duty Series Safet
What are the differences between THB type X2 safety capacitors and regular X2 capacitors
For X2 safety capacitors, those who are not familiar with them believe that their function is to suppress power electromagnetic interference. In fact, X2 capacitors have many usage scenarios, some of which do not require high performance, but some require strict performance from X2 capacitors. Strong capacitor manufacturers, such as WEE Technology, will classify WFC-A X2 capacitors into anti-interference type, resistance capacitance voltage reduction type, THB high temperature resistance, high humidity type. What are the differences between THB X2 safety capacitors and ordinary X2 capacitors? What is THB type X2 safety capacitor?
Simply put, it means that WFC-A can pass the THB 1000h dual 85 test, also known as the dual 85 capacitor.
https://www.weetcap.com/Plastic-Film-Capacitors/WEET-WFCA-THB-X2-85C-Metallized-Polypropylene-Film-Capacitor-275V-305V-310VAC.html
This test may seem simple, but for X2 safety capacitors, it is still difficult to pass because the two biggest factors affecting the lifespan of X2 capacitors are high temperature and humidity. Working in such an environment, ordinary X2 safety capacitors will quickly break down and have a short lifespan.
Some electrical appliances are used in harsh environments, such as smart meters used outdoors, which may face high temperatures and humidity. In this case, THB type X2 safety capacitors must be used.
Characteristics and functions of THB type X2 safety capacitor:
Optimized series X2 certified type, using polymer polypropylene film medium, thickened metalized electrode, fully automatic spray welding process, 94V0 flame retardant PBT plastic shell, moisture resistant epoxy resin sealing, CP wire lead out. High voltage resistance, moisture and heat resistance, low capacitance drop, specifically designed for resistive capacitive voltage reduction circuits, such as LED driver modules, electric meters, small household appliances and other low-power electronic consumer products. The product can pass the THB1000h dual 85 test.
Compared to ordinary X2 capacitors, it has better high temperature resistance and high humidity performance, but the disadvantage is that the price will be slightly higher.
Safety capacitors are mainly capacitors that require safety certification before they can be used. Currently, the main safety capacitors are: X1 safety capacitor, X2 safety capacitor, and Y1 and Y2 safety capacitors. Some people want to know if x2 is a safety capacitor?
The answer is affirmative: X2 is one of the safety capacitors, and its usage is particularly large. Although X1 is also a safety capacitor, its usage is relatively small. There are actually many types of X2 safety capacitors, and different types of X2 capacitors have very different functions. Below we will introduce them one by one:
1. X2 safety capacitor for suppressing power electromagnetic interference
This is the most typical use of X2 capacitor, which is commonly used to suppress power electromagnetic interference. It mainly uses polymer polypropylene film dielectric, thickened metalized electrode, fully automatic spray welding process, 94V0 flame retardant PBT plastic shell, epoxy resin sealing, high voltage resistance, and strong transient pulse voltage withstand ability. Widely used in power supply parallel cross line circuits to suppress electromagnetic interference.
2. X2 safety standard capacitor for capacitive divider power supply
Another common function of X2 capacitors is to reduce voltage through resistance and capacitance. In some small home appliance controls and smart meters, using capacitors for voltage reduction is simpler and more cost-effective than using transformers. X2 capacitors are specifically designed for resistance and capacitance voltage reduction circuits, using polymer polypropylene film dielectric, thickened metalized electrodes, fully automatic spray welding technology, 94V0 flame-retardant PBT plastic shell, moisture resistant epoxy resin sealing, and CP wire lead out. High voltage resistance, moisture and heat resistance, low capacitance drop, specifically designed for capacitive divider power supply circuits, such as LED driver modules, electric meters, small household appliances and other low-power electronic consumer products.
3. Double 85 type X2 safety capacitor, X2 Heavy Duty Series Safety Capacitors
The double 85 X2 capacitor is also used for resistance capacitance voltage reduction, but its performance is better and can pass the THB1000h double 85 test. It is used in some circuits with harsh operating environments, such as smart meters, which are mainly used outdoors to withstand high temperature and high humidity environments. Therefore, the double 85 X2 capacitor must be used. It has high voltage resistance, moisture resistance, and low capacitance drop, and is specifically designed for resistive capacitive voltage reduction circuits, such as LED driver modules, electric meters, small household appliances, and other low-power electronic consumer products. The product can pass the THB1000h dual 85 test.
4. RC parallel and series X2 capacitors
This type of X2 capacitor has a unique internal structure, with a resistor connected in parallel or series. The RC parallel type X2 capacitor is composed of an internal parallel connection between the X2 capacitor and the discharge resistor, and has excellent flame retardant performance. Widely used in anti-interference applications such as power lines. The RC series X2 capacitor has good noise suppression, energy peak absorption, and damping effects.
The X2 capacitor of the THB series is specifically designed for capacitive divider circuits connected in series with 100-240VAC power supplies, such as electric meters, LED driver modules, etc. Its biggest advantage is smaller capacity attenuation, better resistance to high temperatures and humidity, and significantly better performance than ordinary anti-interference X2 safety capacitors.
THB MKP-X2 Polypropylene Film Capacitors for EMI Suppression (THB Grade IIIB: 85C, 85% R.H., 1,000h)
High stability of capacitance under sever ambient condition, such as high temperature and high humidity
1. Internally wrapped with metalized polypropylene film.
2. Excellent self-healing performance, able to withstand surge voltage impact.
3. Excellent capacitance stability under long-term load, with significantly less capacity decay, and longer lifespan when used in capacitive divider power supply circuits.
4. Excellent moisture resistance, high humidity resistance, and can also be used in some harsh environments.
5. Excellent flame retardant performance.
6. Excellent capacity stability for long-term application in harsh environments such as high temperature and humidity.
In summary: THB series X2 safety capacitors belong to the optimized series X2 certification type, using polymer polypropylene film dielectric, thickened metalized electrodes, fully automatic spray welding process, 94V0 flame retardant PBT plastic shell, moisture resistant epoxy resin sealing, and CP wire lead out. High voltage resistance, moisture and heat resistance, low capacitance drop, specifically designed for capacitive divider power supply circuits, such as LED driver modules, electric meters, small appliances and other low-power electronic consumer products. The product can pass the THB 1000h 85C test.
WFT Features
WEET WFT High Voltage Metallized Polypropylene Film Capacitors For Power SupplyMetallized polypropylene film wound.
Non-inductive construction the polyester tape or specific tape wrap and epoxy resin end filled,
Excellent self-hearing property and temperature stability,
Copper solder tags, copper screw, copper nut and others are available on request.
Main Applications
Mainly used high voltage converter super high voltage power supply, high voltage coupling and carrier wave communication signal coupling in high voltage transmission lne.
WEE Technology Company Limited - WEE are Capacitors Specialist
1. Material introduction of MMKP82 capacitor.
MMKP82 capacitor is a kind of CBB capacitor, so its main material is also metallized polypropylene film. MMKP82 capacitor uses polypropylene film as the medium,
high-temperature resistant double-sided metallized polypropylene film with excellent self-healing characteristics as the electrode,
and the two ends are sprayed with gold to form a non inductive structure.
It is led out in one direction, and the lead out is made of tinned copper wire (Cu wire) and encapsulated with flame-retardant epoxy resin.
2. Why are MMKP82 capacitors so rare?
Generally, we use CBB81 capacitors in resonant circuits.
However, the biggest inconvenience of this type of capacitor is that it is too large, and it will take up a lot of space to install on the circuit.
Moreover, it is also a powder coated capacitor. Its high temperature resistance and high humidity performance are not good. This problem can be solved by using MMKP82 capacitors.
3. Why is it so difficult to produce MMKP82 capacitors?
The double-sided metallized polypropylene film is not easy to produce, and the manufacture of this capacitor also requires customized special winding machine equipment, which is expensive;
In addition, during the manufacturing process, the operating skills of operators are very strict, the operation efficiency is low, and the overall cost is high.
Therefore, at present, there are not many manufacturers that can produce double-sided metallized polypropylene film capacitors with plastic shells.
However, at present, there are some powerful manufacturers in China that can produce such capacitors, and their performance is much better than CBB81 capacitors.
4. What is the function and application of MMKP82 capacitor?
MMKP82 capacitor has the same function as CBB81 capacitor. At present, it is mainly used in high voltage, high frequency and pulse circuits.
For example, the performance of electric vehicle charging pile power control board, high-power LED driving power supply, mining machine power supply, ultrasonic power supply and other circuits is better than that of CBB81 capacitor.
WEE Technology Company Limited - WEE are Capacitors Specialist
WEET Focus on the R & D and production of miniaturized plastic film capacitors, and focus more on it, so it is more professional
Import miniaturized film capacitor production equipment from Italy.
We are the best at the production of subminiature polypropylene and polyester capacitors (powder packed and boxed).
Focus on meeting customers' requirements for miniaturized capacitors.
Special CBB capacitor for wireless charging, leading the industry in terms of shipment
The research and development of special CBB capacitor for wireless charging has been started since 2017, which is one of the earlier research and development in the industry.
It is used in batches by well-known enterprises in the industry, such as tylt recommended by Nanfu, Sony, Netease and apple
The thickness of special CBB capacitor for wireless charging shall be 2.9mm.
There is no intermediate link, and the manufacturer sells directly to save costs for you
The new factory covering an area of more than 30 mu was completed in may2017.
It has introduced advanced machines from Italy and other countries, and has several automatic production lines.
Self production and self sales, eliminating intermediate links, saving costs for you, and really saving you money.
WEE Technology Company Limited - WEE are Capacitors Specialist
CBB21X and CL21X belong to ultra small thin film capacitors. In many circuits, the volume of capacitors is very small. The traditional CBB21 and CL21 capacitors with large volume are no longer suitable. At this time, CBB21X and CL21X capacitors can be used.
CL21X is a subminiature metallized polyester film capacitor. Its advantages are high temperature resistance of 120 ℃ and small size. Its disadvantages are that its loss is higher than that of CBB21X, so it can only be used in DC and low pulse occasions.
CBB21X is a subminiature metallized polypropylene film capacitor, which is resistant to high temperature of 105 ℃, low loss, ≤ 0.0008%, and small internal temperature rise. It is suitable for various circuits with large AC and DC pulses, and is mostly used in circuits requiring small size, low loss and high stability.
It is difficult to see the difference between the two capacitors from the appearance. The CL21X capacitor is used more, but CBB21X has small loss, good stability and high reliability, and can be used in circuits with higher frequency.
The smaller the film capacitor, the better the production?
At present, capacitors are developing towards miniaturization. However, from the perspective of production difficulty, the smaller the size, the greater the difficulty of production. Therefore, most capacitor manufacturers in the industry are only good at producing large capacitors, not small capacitors.
Check more detalis at below link for WFH CL21X specifications:
https://www.weetcap.com/pdf/WEET-WFH-Mini-Metallized-Polyester-Film-Capacitors.pdf
WEE Technology Company Limited - WEE are Capacitors Specialist
In the past, the most commonly used thin-film capacitors were CBB22 capacitor and CL21 capacitor. Among them, CL21 capacitor was largely replaced by CBB22 capacitor, and the frequency of CL21 capacitor was less and less. However, now there is a CL21X capacitor, which has become particularly large. What is CL21X capacitor? What are its characteristics and functions?
CL21X subminiature polyester film capacitor
The full name of CL21x capacitor is metallized polyester film subminiature capacitor. We know that the biggest advantage of CL capacitor compared with CBB capacitor is smaller volume and higher temperature resistance. Therefore, polyester film is often selected when making subminiature capacitor, which can make the capacitor volume smaller. This is also one reason why CL21X capacitor has more users.
Structure of CL21X capacitor
Medium: polyester film
Electrode: metal vacuum evaporation layer (aluminum)
Package: flame retardant epoxy resin (UL94 V-0)
Lead: tinned copper-clad steel wire (CP wire) or tinned copper wire
Characteristics and functions of CL21X capacitor
The volume of CL21X capacitor is very small and has good self-healing; Good appearance consistency; High reliability.
It is mostly used in DC and low pulse occasions. Such as low-frequency filtering, DC isolation, bypass and coupling, etc.
Check more details at : https://www.weetcap.com/Plastic-Film-Capacitors/WEET-WFH-CL21X-Mini-Metallized-Polyester-Film-Capacitor.html
WEE Technology Company Limited - WEE are Capacitors Specialist
What is the difference between CL71 and CL23B
1. CL71 is a correction capacitor of laminated structure.
CL71 is indeed a correction capacitor, but it belongs to the internal structure and is laminated. In fact, CL23B and CL71 belong to non inductive winding, but CL71 capacitor basically has no inductance, while CL23B has a small amount of inductance. However, the disadvantage of CL71 capacitor is that the production is complex and the production equipment is very expensive. At present, it is very rare for domestic manufacturers to produce CL71 capacitor.
2. CL23B is a winding correction capacitor.
The correction capacitors we see on the market are basically CL23B metallized polyester film wound capacitors. They belong to ultra-small polyester film capacitors, also known as minbox capacitors. It is much less difficult to produce. Most manufacturers who are good at producing small film capacitors can produce them, and the equipment used is relatively common.
Small boxed film capacitors CL23B series use metallized polyethylene film as medium and electrode, non inductive winding structure, encapsulated in small plastic shell and filled with epoxy resin. CL23B series correction capacitors are suitable for various applications of MEF series, especially those with high requirements for capacitor size and square appearance.
Characteristics and functions of CL23B correction capacitor: small volume, light weight, wide capacity range and large ratio capacity; Good self-healing and long service life; Applicable to DC isolation, bypass, coupling and filtering of DC and VHF signals; It is especially suitable for color TV, SPC exchange and military machine LCD monitor rectification, automotive DC motor interference suppression and other occasion
https://www.weetcap.com/Plastic-Film-Capacitors/
WFG CL23B Mini Box Metallized Polyester Film Capacitor Standard Capacitance, voltage and size table.
For other values, please contact with our sales for more details.
| CODE | UF | 63V | 100V | 250VDC | 400VDC | 630VDC | （W*H*T） |
| 102 | 0.001 | M1 | M1 | M1,M2 | M2,M3 | M2,M3 | M1:7.2*6.5*2.5 |
| 152 | 0.0015 | M1 | M1 | M1,M2 | M2,M3 | M2,M3 | M2:7.2*7.5*3.5 |
| 222 | 0.0022 | M1 | M1 | M1,M2 | M2,M3 | M2,M3 | M3:7.2*9.5*4.5 |
| 332 | 0.0033 | M1 | M1 | M1,M2 | M2,M3 | M2,M3 | M4:7.2*10*5 |
| 472 | 0.0047 | M1 | M1 | M1,M2 | M2,M3 | M2,M3 | M5:7.2*11*6 |
| 682 | 0.0068 | M1 | M1 | M1,M2 | M2,M3 | M2,M3 | |
| 103 | 0.01 | M1 | M1 | M1,M2 | M2,M3 | M3 | |
| 153 | 0.015 | M1 | M1 | M1,M2 | M2,M3 | M3,M4 | |
| 223 | 0.022 | M1 | M1 | M1,M2 | M2,M3 | M4,M5 | |
| 333 | 0.033 | M1 | M1 | M1,M2 | M2,M3 | M4,M5 | |
| 473 | 0.047 | M1 | M1 | M1,M2 | M2,M3 | ||
| 683 | 0.068 | M1 | M1 | M2,M3 | M3,M4 | ||
| 104 | 0.1 | M1 | M1 | M3 | M4 | ||
| 154 | 0.15 | M1 | M1 | M3,M4 | M4,M5 | ||
| 224 | 0.22 | M1 | M1,M2 | M5 | M5 | ||
| 334 | 0.33 | M2,M3 | M2,M3 | M5 | |||
| 474 | 0.47 | M2,M3,M4 | M2,M3,M4 | ||||
| 684 | 0.68 | M4,M5 | M4,M5 | ||||
| 105 | 1.0 | M5 | M5 | ||||
| 155 | 1.5 | M5 |
