WEET Material and Application of WFK MMKP82 Double Sided Metellized Polypropylene Film Capacitor

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.



WEET Epoxy Coated Pitch 5mm CBB21X Miniaturized Plastic Film Capacitors 50V to 1000V

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.


WEET Tells You What is the Difference Between CBB21X and CL21X Capacitors

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:


WEET WFH CL21X Mini Metallized Polyester Film Capacitor 50V 63V 100V 250V 400V 630VDC Pitch 5MM

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

WEET Chinese Manufacturer for CL23B Mini Box Metallized Polyester Film Capacitor Ammo Packing

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


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.











WEET WFG CL23B Pitch 5mm Miniature MKT Polyester Film Capacitor 50V 63V 100V 250V 400V 630V

WEE Technology Company Limited - WEE are Capacitors Specialist

Sometimes, there may be many names for the same capacitor. Because of its many names, it is easy to confuse people. Is CL23B a correction capacitor?

In fact, there are many kinds of correction capacitors. For example, the winding type is called CL23B capacitor, and the other is CL71 capacitor with laminated structure. Even the correction capacitor is also called minibox capacitor, miniaturized boxed capacitor, ultra-small boxed capacitor, etc. in fact, they all refer to a kind of capacitor, that is, correction capacitor.

Small boxed film capacitors CL23B series use metallized polyethylene film as medium and electrode, non inductive structure, encapsulated in small plastic shell and filled with epoxy resin.

The capacitor has small volume and good appearance consistency. It is especially used in some circuit occasions requiring small capacitance volume. It is mostly used in all kinds of low-power and low-frequency circuits.

This kind of capacitor is encapsulated with plastic shell. The common colors are yellow, gray, red and blue. Although the colors are different, the performance is not much different, and the functions are the same.


Operating Temperature:-40℃~ +100℃ ,   40/100/21
Rated Voltage(V.DC):50V, 63V, 100V, 250V, 400V, 630V.
Capacitance Range:0.001   ~ 2.2µF
Capacitance Tolerance:±5%,   ±10%, ±20%
Insulation Resistance:UR≤100V    C≤0.33µF  ≥3750MΩ
C>0.33µF ≥1250S
UR>100V C≤0.33µF  ≥7500MΩ
C>0.33µF ≥2500S
(20℃  100VDC  60SEC) P.S:   T[s]=I.R.[MΩ]*CN [µF]
Dissipation Factor:≤0.01   (at 1KHz 20℃)

WEET WFG Mini Box Metallized Polyester Film Capacitors CL23B China Factory

WEE Technology Company Limited - WEE are Capacitors Specialist

WEET WFG CL23B Mini Box Metallized Polyester Film Capacitor Features:
Miniature size, Rounded by metalized polyester film, good self-healing effect
Moisture-proof, flame retardant, some small capacitance can be used in series film
Low dissipation factor, high voltage, box type by the epoxy potting
Good self-healing effect, good stability and reliability

WEET WFG CL23B Mini Box Metallized Polyester Film Capacitor Main Applications:
Identical appearance is applicable to all kinds of low dissipation and high precision capacitance circuits
Widely used for DC low pulse portion of occasions, typical applications are amplifier, TV, communications, power supply and  other products requiring high reliability circuit

WEET WFG CL23B Mini Box Metallized Polyester Film Capacitor Datasheet:


WEET Metallized Polyester MKT and Polypropylene MKP Film Capacitors Cross Reference Guide

WEE Technology Company Limited - WEE are Capacitors Specialist

WEE Technology can produce and offer you full series of film capacitors under our own trademark WEET.

Different dielectric materials:polyester film capacitors, Box type polypropylene film capacitors, Dip type polypropylene film capacitors

Tolerance range:±1%, ±2%, ±2.5%, ±5%, ±10%

Temperature range:normally film capacitors temperature range is -40'C to 85'C, for some series we can provide a wide temperature range up to 125'C.

Technology available:Winding technology and stacked technology, single side metallized structure and metallized structure

Safety Approvals of film capacitors:RoHS REACH ENEC, VDE, UL, TUV, CE

Packaging:Ammo/Tape packaging and Bulk packaging both available

WEET All Kinds of Capacitors Cross Reference Guide



WEET Polyester and Polypropylene Film Capacitor RoHS REACH Halogen Test Report

WEE Technology Company Limited - WEE are Capacitors Specialist

WEET Polyester and Polypropylene Film Capacitor RoHS REACH Halogen Test Report







WEET WEE Technology Capacitors Factory in China Wish You Merry Christmas and Happy New Year

WEE Technology Company Limited - WEE are Capacitors Specialist

Dear Customers,
How time flies! We are going to say goodbye to year 2021 and welcome the New Year 2022.
In 2021, we are all still undergoing a long process of COVID-19 all over the world. The economy is going down globally.
Some of our competitors even shut down factory and is wielding the jobs cutting acts in a big way.
However, WEET 2021 annual turnover is surprisingly stable and even better than the past years.
WEET wholeheartedly thank for all the customers’ supports and trust.

In 2022, we are expecting a fresh new year, the COVID-19 is gone forever. The entire business field is thriving and prosperous.
WEET has planned to expand Capacitors factory and greatly promote capacitors under WEET brand.
Without your support, WEET is ZERO.
WEET success is greatly depends on our valuable customers. Let us make the best of 2022 to build our business partnership.

Yours Sincerely,
From your faithful and supportive friend
WEE Technology Company Limited