WEE Technology Company Limited - WEE are Capacitors Specialist
WMM 1000H 105°C, Bi-polar Alcap Features:
Low Dissipation Factor, MAX 5% at 1KHz
Specially produced for Cross-Over Networks with high fidelity audio system
High-quality crossover non-polar aluminum electrolytic capacitors
Product mainly used: audio converters and dividers (partials), Audio amp, automotive electronics products, speaker.
Note 1:Other Dissipation Factor 3%, 4%, 6%, 7%, 8%, 9%, 10%, 12% are available on request.
Note 2:The sleeve (PET) color of the product differs from batch to batch, so there will be slight color difference. Thank you.
No | Description | Dimension |
WMM : 1000H 105°C, Bi-polar 1KHZ DF 5% Aluminum Electrolytic Capacitors for Audio and Speaker System | ||
1 | 4.7uF 50VDC +/-5% DxL=10*19mm Bulk RoHS | 10*19(D+0.5max,L+1.5max) |
2 | 6.8uF 50VDC +/-5% DxL=10*24mm Bulk RoHS | 10*24(D+0.5max,L+1.5max) |
3 | 8.2uF 50VDC +/-5% DxL=13*27mm Bulk RoHS | 13*27(D+0.5max,L-1+2max) |
4 | 10UF 50VDC +/-5% DxL=13*27mm Bulk RoHS | 13*27(D+0.5max,L-1+2max) |
5 | 15uF 50VDC +/-5% DxL=13*27mm Bulk RoHS | 13*27(D+0.5max,L-1+2max) |
6 | 22uF 50VDC +/-5% DxL=13*27mm Bulk RoHS | 13*27(D+0.5max,L-1+2max) |
7 | 33uF 50VDC +/-5% DxL=13*32mm Bulk RoHS | 13*32(D+0.5max,L-1+2max) |
8 | 47uF 50VDC +/-5% DxL=13*32mm Bulk RoHS | 13*32(D+0.5max,L-1+2max) |
9 | 68uF 50DC +/-5% DxL=16x34mm Bulk RoHS | 16*34(D+0.5max,L-1+2max) |
10 | 100UF 50VDC +/-5% DxL=16*34mm Bulk RoHS | 16*34(D+0.5max,L-1+2max) |
11 | 4.7uF 100VDC +/-5% DxL=13*27mm Bulk RoHS | 13*27(D+0.5max,L-1+2max) |
12 | 6.8uF 100VDC +/-5% DxL=13*27mm Bulk RoHS | 13*27(D+0.5max,L-1+2max) |
13 | 8.2uF 100VDC +/-5% DxL=13*27mm Bulk RoHS | 13*27(D+0.5max,L-1+2max) |
14 | 10UF 100VDC +/-5% DxL=13*27mm Bulk RoHS | 13*27(D+0.5max,L-1+2max) |
15 | 15uF 100VDC +/-5% DxL=13*27mm Bulk RoHS | 13*27(D+0.5max,L-1+2max) |
16 | 22uF 100VDC +/-5% DxL=13*27mm Bulk RoHS | 13*27(D+0.5max,L-1+2max) |
17 | 33uF 100VDC +/-5% DxL=13*32mm Bulk RoHS | 13*32(D+0.5max,L-1+2max) |
18 | 47uF 100VDC +/-5% DxL=13*32mm Bulk RoHS | 13*32(D+0.5max,L-1+2max) |
19 | 100UF 100VDC +/-5% DxL=16*38mm Bulk RoHS | 16*38(D+0.5max,L-1+2max) |
WEE Technology Company Limited - WEE are Capacitors Specialist
5. Open circuit
The open circuit failure of aluminum electrolytic capacitor may occur when it works in high temperature or hot humid environment for a long time. The reason is that the anode lead-out foil is broken due to electrochemical corrosion. For high voltage and large capacity capacitors, there are many such failure modes. In addition, if the anode lead-out foil and anode foil are riveted, the capacitor will open intermittently due to poor contact. In use, over mechanical stress may cuase the open circuit of the capacitor.
6. Deterioration of electrical parameters
① Decrease of capacitance and increase of loss
The capacitance of aluminum electrolytic capacitor decreases slowly in the early stage of operation, which is due to the continuous repair of working electrolyte and thickening of anodic oxide film during the loading process. In the later stage of use of aluminum electrolytic capacitor, due to the loss of electrolyte and the thickening of solution, the resistivity increases due to the increase of viscosity, resulting in the increase of equivalent series resistance of working electrolyte, resulting in the obvious increase of capacitor loss. At the same time, the electrolyte with increased viscosity is difficult to fully contact the oxide film on the surface of the corroded uneven aluminum foil, which makes the effective area of the electrode plate of the aluminum electrolytic capacitor decrease and the capacitance drops sharply. This is also the performance of the capacitor near the end of its service life.
In addition, if the viscosity of working electrolyte increases too much at low temperature, the loss will increase and the capacitance will drop sharply. In use, over temperature and ripple current may make the capacitance decrease and loss increase.
② Leakage current increases
The increase of leakage current often leads to the failure of aluminum electrolytic capacitor. Low process level, serious damage and contamination of oxide film, poor formulation of working electrolyte, low purity of raw materials, difficulty in long-term stability of chemical and electrochemical properties of electrolyte, low purity of aluminum foil and high content of impurities, etc., all of these factors may cause leakage current out of tolerance. The chloride ion contamination in aluminum electrolytic capacitor is serious. The leakage current leads to the decomposition of oxide film at the contaminated part, resulting in perforation, which further increases the current. In a word, the existence of metal impurities in aluminum foil will increase the leakage current of aluminum electrolytic capacitor, thus shortening the life of capacitor.
WEE Technology Company Limited - WEE are Capacitors Specialist
Today we will go on the topic about Aluminum Electrolytic Capacitors failure mode and cause analysis
3. Break down
The breakdown of aluminum electrolytic capacitor is caused by the rupture of anodic alumina dielectric film, which leads to direct contact between electrolyte and anode. The alumina membrane may be locally damaged due to various materials, processes or environmental conditions. Under the action of external electric field, the oxygen ion supplied by working electrolyte can form oxide film again at the damaged part, which makes the anodic oxide film filled and repaired. However, if there are impurity ions or other defects in the damaged parts, so that the filling and repairing work can not be completed, then there will be micro holes on the anodic oxide film, or even become through holes, which will make the aluminum electrolytic capacitor breakdown.
In addition, with the increase of use and storage time, the solvent in the electrolyte is gradually consumed and volatilized, which makes the acid value of the solution increase, and the oxidation film is corroded during storage. At the same time, due to the aging and drying up of electrolyte, oxygen ion can not be provided to repair the oxide film under the action of electric field, thus the self-healing effect is lost. Once the oxide film is damaged, the capacitor will be broken down. The process defect is also a main reason for the breakdown of aluminum electrolytic capacitor. If the riveting process is not good, the burr on the lead-in chaff will seriously hurt the oxide film, and the leakage current of the stabbed part is very large, and the local overheating will cause thermal breakdown of the capacitor. In use, over temperature, ripple current or mechanical stress may make the capacitor breakdown failure.
4. Burn down
The burning of aluminum electrolytic capacitor is generally caused by the following reasons:
① The positive and negative poles are reversed. Aluminum electrolytic capacitor is a kind of capacitor with positive and negative electrodes. If the positive and negative electrodes are wrongly connected when installing the aluminum electrolytic capacitor, the capacitor will burn out;
② The pressure is not enough. When the voltage exceeds the withstand voltage value of aluminum electrolytic capacitor, the capacitor will burn out;
③ The quality is unqualified. The aluminum electrolytic capacitors produced by some manufacturers are not up to standard, which may lead to the burning of capacitors.
WEE Technology Company Limited - WEE are Capacitors Specialist
WEET is famous in producing all kinds of aluminum electrolytic capacitors. Today we would like to share 6 failure modes and cause analysis about aluminum electrolytic capacitor. All the information is collected by WEET engineers and for knowledge reference only. If you have other opinions, welcome to email us and discuss with WEET engineers.
1、 Concept of aluminum electrolytic capacitor
Aluminum electrolytic capacitor is made of aluminum cylinder as negative electrode, which is filled with liquid electrolyte and inserted into a bent aluminum strip as positive electrode. It also needs DC voltage treatment to form an oxide film on the positive plate. It is characterized by large capacity, but large leakage, poor stability, positive and negative polarity, suitable for power filter or low-frequency circuit.
2、 Common failure modes of aluminum electrolytic capacitors
When the capacitor fails, the material, structure, manufacturing process, performance and service environment of all kinds of capacitors are different, and the failure mechanism is also different. Today, easy capacity network will reveal common failure modes of aluminum electrolytic capacitors: leakage, explosion, open circuit, breakdown, deterioration of electrical parameters, etc.
3、 Failure mode and cause analysis
A. Leakage
Leakage is one of the causes of capacitor failure, and aluminum electrolytic capacitor is no exception. The working electrolyte of aluminum electrolytic capacitor is acidic. If it overflows, it will seriously pollute and corrode other components and printed circuit board around the capacitor. At the same time, the electrolyte in the electrolytic capacitor dries up gradually due to leakage, which leads to the failure of capacitor due to breakdown or deterioration of electrical parameters. There are many causes of leakage, such as:
① The sealing of aluminum electrolytic capacitor is poor;
② If the aluminum electrolytic capacitor is sealed with rubber plug, the rubber may be aged and cracked due to its long service life;
③ There are some problems in mechanical seal technology;
④ Generally, the manufacturer will consider the problem of liquid leakage. They will specify in the enterprise standard that vertical installation is required, while some enterprises adopt horizontal installation.
B. Explosion
When the working voltage of aluminum electrolytic capacitor is too large, or there are many defects in the oxide film medium, or there are harmful anions such as chlorine radical and sulfate radical, so that when the leakage current is large, the rate of gas generated by electrolysis is faster. The longer the working time is, the greater the leakage current, the more gas in the shell and the higher the temperature. The pressure difference inside and outside the metal shell of capacitor will increase with the increase of working voltage and working time. If the sealing is good and there is no explosion-proof measures, the capacitor will explode when the air pressure increases to a certain extent.
WEE Technology Company Limited - WEE are Capacitors Specialist
The positive and negative polarity will be marked on the shell of electrolytic capacitor, and attention must be paid to its polarity in actual use, otherwise there is a risk of explosion. If the polarity of an electrolytic capacitor can not be recognized, its polarity can be judged with a pointer multimeter.
So how to identify the polarity of Electrolytic capacitor by Multimeter?
Due to the difference between positive and negative polarity of electrolytic capacitor, it has a feature of using multimeter resistance to detect it: the positive electrode is connected with black probe (positive power supply), the negative terminal is connected with red probe (negative power supply), and the leakage current of electrolytic capacitor is small (Large leakage resistance). On the contrary, the leakage current of electrolytic capacitor increases (the leakage resistance decreases).
When measuring, first assume that one pole is "+" pole, connect it with the black probe of the multimeter, and connect the other electrode with the red probe of the multimeter. Record the scale of the stop of the probe (the resistance value of the probe is large on the left side), then discharge the capacitor (i.e. the two leads touch each other), exchange the two probes, and re measure. In the two measurements, the last time the needle stays on the left (with high resistance), the black probe is connected to the positive electrode of the electrolytic capacitor.
At the same time, you can tell the polarity of WEET Axial Electrolytic capacitors by external appearance. Firstly, on one side of the lead, there is a protruding end, which is a negative pole. At the same time, the sleeve marking will has a "-" one it and arrow to one side , which is showing as negative pole.
WEE Technology Company Limited - WEE are Capacitors Specialist
The main applications of the polarized axial Aluminum Electrolytic Capacitors products are: frequency converter, frequency conversion air conditioner, welding machine, inverter power supply, switching power supply, high-quality electronic machine, high-grade audio frequency division, computer motherboard, intelligent instrument, power wave of industrial control equipment, medical equipment, household appliances, communication power supply, etc...
Widely used in smart meters, electric vehicle charger controller, car navigation box, vehicle electronic equipment, POS card reader, smart meter, TV set-top box, satellite receiver, VCD / DVD, audio amplifier, car audio, charger, telephone, instrument, electronic ballast, electronic energy-saving lamps, lighting, financial equipment and appliances, medical electronic equipment and other electronic equipment Products.
WEE Technology Company Limited - WEE are Capacitors Specialist
Audio circuit usually includes frequency division, filtering, bypass, coupling and other capacitors.
Most of the coupling capacitance in audio circuit is CBB capacitor, because CBB capacitor has a great impact on the improvement of sound quality.
WEET WMD CBB20 Capacitors is widely used in the fields of energy saving, sound, sound box, audio frequency, flash lamp, stage lamp and disinfection lamp
How much capacitance is the best for midrange speakers?
The selection of capacitor has a great influence on the sound playing of the midrange loudspeaker. It is not suitable to be too large or too small.
In general, the capacitance of about 10 μF can be selected according to the regular pattern.
What is the best capacitance of a loudspeaker?
Generally, the resonant frequency of the common diaphragm treble is about 1000-3000hz. Look at the inner core. If the inner core is too small and the power is not enough, use 3.3uF or 2.2uF less.
There are 20 cores in the inner core, and 4.7uF can be used.
This is just a simple discussion of power. Adjusting the capacitance also needs to do some work with the matching of the bass speaker, and also consider the phase problem of the bass and treble.
The high-frequency loudspeaker is the high-frequency loudspeaker unit in the speaker box. Its function is to replay the high-frequency signal (frequency range 1 is generally within 5KHz-10KHz) output from the frequency divider.
WEE Technology Company Limited - WEE are Capacitors Specialist
CBB20 is an axial metallized polypropylene film capacitor. In fact, there are many names for CBB20 capacitor, such as audio frequency capacitor, axial capacitor, yellow wax capacitor, yellow tape capacitor, piercing capacitor and so on. In fact, they are all CBB20 capacitors.
CBB20 capacitor has a price advantage, ultra-small size, a variety of colors, common yellow, black two, also have blue, white, red and so on.
It is made of metallized polypropylene film. The lead wire is led out axially and wrapped with high temperature tape. Both ends are sealed with flame retardant liquid. The appearance is round or cylindrical. It has low noise, low loss and small internal temperature rise. It is suitable for various AC and DC pulse and high current circuits. Such as communication equipment, radio, television, power supply, instrumentation and other products.
WMD MKP CBB20 Capacitors Features: the product is made of metallized polypropylene film, the lead is drawn out axially, wrapped with high-temperature tape, both ends are filled with flame-retardant liquid. The appearance is round or cylindrical, with low noise, low loss and small internal temperature rise. It is suitable for all kinds of AC and DC pulse and high current circuits.
With metallized polypropylene film as medium and electrode, wrapped with flame retardant tape and sealed with epoxy resin, it has excellent electrical performance, good reliability, wide capacity range, low loss, long service life and good self-healing.
WMD MKP CBB20 Capacitors Product Function: applicable to all kinds of AC and DC pulse and high current circuit. It is suitable for AC and DC circuits of instruments, household appliances, and VHF signal isolation, bypass, coupling, filtering, etc. it is widely used in high-grade audio system frequency division circuit.
WEE Technology Company Limited - WEE are Capacitors Specialist
WEET China Axial Film Capacitor Manufacturer CBB20 Flat MKP Car Audio Capacitors
WEET WMD CBB20 Technical data and specifications | |
Operating temperature range | Max. operating temperature Top,max 85 Centigrade |
Upper category temperature Tmax 85 Centigrade | |
Lower category temperature Tmin 40 Centigrade | |
Rated capacitance CR | 0.1 µF~47µF |
Tolerance | J(+-5%); K(+-10%) |
Rated voltage VR | 250VDC~1250VDC |
DC test voltage | 1.4*VR, 2s |
Rated frequency FR | 50/60Hz |
Dissipation factor tan d | <=0.002 1KHZ |
Insulation resistance | CR<=0.33µF VR<=100V >=50000MΩ |
VR>100V >=100000MΩ | |
CR>0.33µF VR<=100V >=15000s | |
VR>100V >=30000s |
CAP(uF) | WMD - 250VDC | |||
W | T | H | ||
104 | 0.1 | 15 | 5 | 8 |
224 | 0.22 | 20 | 5 | 9 |
334 | 0.33 | 20 | 8.5 | 13 |
15.5 | 7 | 10.5 | ||
474 | 0.47 | 25 | 6.5 | 11 |
15.5 | 8.5 | 12.5 | ||
684 | 0.68 | 25 | 8 | 11 |
20.5 | 6.8 | 12 | ||
105 | 1 | 24 | 8 | 14.5 |
225 | 2.2 | 30.5 | 10 | 16.5 |
335 | 3.3 | 30.5 | 13 | 19 |
475 | 4.7 | 30.5 | 17 | 22 |
565 | 5.6 | 30.5 | 17.5 | 24 |
685 | 6.8 | 45 | 15 | 21 |
825 | 8.2 | 45 | 16.5 | 23 |
106 | 10 | 45 | 18.5 | 25 |
156 | 15 | 55 | 20.5 | 27 |
226 | 22 | 55 | 26 | 32 |
306 | 30 | 55 | 31 | 37 |
336 | 33 | 60 | 31 | 37 |
476 | 47 | 60 | 37 | 43.5 |
WEE Technology Company Limited - WEE are Capacitors Specialist
The main difference between CBB20 MPT axial polypropylene capacitor flat and CBB20 MKP axial polypropylene capacitor round is the shape.
Sometimes due to the PCB design, the height space is limited, so it is the right choice to choose CBB20 MPT instead of .
And when the coupling capacitor is used, the effect is good!
WEET WMD CBB20 (MPA) metallized polypropylene film capacitor (axial compression flat)
WEET WMD CBB20 (MPT) metallized polypropylene film capacitor (tube and round type)
So in the production process, we need to use hot press machine to press the round film to flat shape.
Some of the factory will add more cost on the WEET WMD CBB20 (MPA) type, but to WEET, we offer the same cost to customers.
Welcome to try WEET WMD CBB20 Yellow color capacitor, the best audio and music capacitors in China.