WEE Technology Company Limited - WEE are Capacitors Specialist

WEET WMC MPA MPP MKP CBB19 630VDC 2.2uF 5% Audio Amplifier Capacitor

What is the main function of capacitors in audio amplifiers?

Generally capacitors in audio amplifiers has below seveval functions: 

In Biasing,  they Block DC signal flow

In Biasing,  they Pass AC signal flow

In Feedback,  they can integrate a signal

In Filters,  they can differentiate a signal

As a rule the bigger the value of capacitance the lower the frequency ( FQ ) that will pass through the cap.

If the capacitor goes to ground it diminishes ( shunts ) lower FQ signals out of the amplifier.

If the capacitor goes in series with the signal path in (pass mode) it increases the lower FQ of the amplifier.

WEE Technology Company Limited - WEE are Capacitors Specialist

WEET Is it Better to use 100V 2.2uF Capacitor or 250VDC/400VDC 2.2uF for High Pitch Speaker?
The answers to this question is up to the circuit , we usually suggest to use high voltage capacitor to replace lower one in most applications. But sometimes it will be exception. so you can try both and find the best one you need.

The yellow appearance capacitor, Audiophiler MKP-kondensotor 2.2uF/400VDC,  is polypropylene film capacitor, which has the characteristics of small leakage, fast reaction speed and no inductance. It can be used in power supply B and filter circuit of gall machine.WEET capacitor has a wide range of sound, excellent timbre, soft and sweet tone, and good charm. It is more suitable for coupling and linking between stages, especially for output cross linking.

Polypropylene Film: imported sungmoon metallized film; more uniform thickness, less noise; service life up to 10 years; higher density, more stable IR characteristics
Gold spraying: automatic control spraying equipment, pure zinc material
Lead out: pure copper thick wire, better conductivity, too much current is not easy to heat
Sealant: flame retardant, strong adhesion
Epoxy resin: automatic epoxy dosing machine and 2-hour fixed curing equipment
Outsourcing: standard thickness, not easy to fade tape, automatic coating equipment operation, efficiency increased 3-5 times
Printing: high definition laser marking, long-term color fastness

WEE Technology Company Limited - WEE are Capacitors Specialist

CBB20 axial film capacitor is wound with metalized polypropylene film in non-inductive type.This round axial lead film capacitor is wrapped with adhesive PET tape and axially welded by tinned copper wire.

Due to small size, WEET film capacitor is easy to install, this kind of audio capacitors, also be called as audio frequency division capacitor, which can be used in all kinds of filter circuit, noise suppression circuit and low impulse circuit.

WEET MKP WMC Metalized Polypropylene MKP Audio Capacitor 250VDC 2.2uF Axial Leads, general capacitance and values in audio applications are : 1.0uF, 1.2uF, 1.5uF, 2.0uF, 2.2uF, 2.5uF, 3.0uF, 3.3uF, 3.5uF, 3.9uF, 4.0uF, 4.7uF, 5.6uF, 6.8uF, 8.2uF, 10uF, voltage range from 250VDC to 630VDC, special voltage and capacitance are on request. WEET capacitors is ready to provide the right capacitors to you.

WEE Technology Company Limited - WEE are Capacitors Specialist

MPK capacitor is often called anti-interference capacitor:

In practical application, some people often can't distinguish the difference between CBB capacitor and MPK capacitor. This article will introduce the difference between CBB capacitor and MPK capacitor from the aspects of
encapsulation, application, electrical difference, efficiency and so on, so as to help you understand the difference between the two capacitors comprehensively and stereoscopically.

Outsourcing method:

The main difference between safety capacitor MPK X2 and CBB22 capacitor lies in the way of external sealing. The box structure of safety capacitor has better flame retardancy and sealing performance. However, CBB22 is basically of immersion type, so its sealing problem is well solved.
Some manufacturers of CBB22 series adopt aluminum film production, others use zinc aluminum film production. The electric properties of the capacitors produced by zinc aluminum film are similar to those of the safety regulations. It is characterized by strong DC withstand voltage capability. The characteristic of aluminum film structure products is that the loss is smaller than that of zinc aluminum film, and the high-frequency AC withstand voltage ability is strong, but the DC withstand voltage capacity is not as good as that of zinc aluminum film.

Usage and application:

CBB22 is lower than MKP in cost and can replace MKP in electrical performance. 
The AC power calculation formula is as follows: P = U * U / XC = U * U / (1 / 2 π FC). U is the effective value of AC voltage, XC is the capacitance reactance, F is the frequency corresponding to AC voltage U, and C is the capacity. MKP capacitor is mainly used for EMI incoming line filtering, CBB capacitor is mainly used for oscillation, coupling, resistance capacitance buck circuit; CBB22 cost is lower than MKP, in terms of electrical performance, it can replace MKP under the condition of meeting actual DC withstand voltage.

Different naming methods:

MKP is a commonly used naming method for Taiwan series or Korean series capacitor plants. The corresponding name in China is CBB19, also known as safety code capacitor. The safety regulations are classified into X1, X2 and X3, among which X2 is the most conventional series and has been certified by many countries. The specification of CBB22 corresponding to Taiwan series or Korean series is MPP capacitor, which is a common type thin film capacitor, generally without safety certification.

Electrical difference:

The nominal rated voltage of MKP capacitor is 250 / 275VAC (X2), but its DC withstand voltage should reach 2000VDC 2s. However, CBB22 capacitor withstand voltage standard is only 1.6 times of rated voltage, and other static electrical parameters are the same.

Efficiency:

The efficiency is affected by the capacitor AC voltage, DC voltage, frequency of these three phase to determine. The concept of working power on capacitor and load power should not be confused, and one power can not be generalized. For the problem of frequency, although many signs are 50 ~ 60Hz, they can also be used in 20 ~ 60KHZ. Some lines are higher. The difference lies in the AC voltage under different frequency conditions, which mainly depends on the power borne by the capacitor not exceeding the standard value. If the power of the working capacitors (MKP61 and CBB22) is 3000W, the capacitance itself will be very hot, so the iron punched capacitors (MKP61 and CBB22) will be broken.

Insulation performance of capacitor:

Both MKP61 and CBB19 capacitors use polypropylene film dielectric, so the loss is small and the heat value is small. In the actual use of the circuit, the temperature rise should not exceed 6 ℃ (higher than the ambient temperature). In the actual test, the temperature rise of many circuit boards is within 4 ℃. If the temperature rise is higher than this condition, it indicates that the working power of the capacitor is too high, and both capacitors are easy to fail.

MKP61 capacitor has better thermal insulation and heat dissipation performance than CBB22 because of its flame retardant shell and potting material. If the capacitor is close to power transistor or other heating elements, MKP61 is safer to use, and CBB22 is more economical if it is far away from the heat source.

WEE Technology Company Limited - WEE are Capacitors Specialist

CBB19 piercing axial capacitor can help achieve the following effects in audio circuit:

1. Good high frequency extension, fine and smooth
2. Low frequency diving depth, clean and full, full of elasticity and strength
3. The distortion of intermediate frequency is very small, transparent and warm, the voice is friendly and natural, thick, magnetic, not exaggerated and nasal
4. Good resolution, rich details, and clear playback of small signals

CBB19 axial through capacitor is made of imported metallized polypropylene organic film, which is made of overlapped electrodes at both ends. 
Thin metal is plated on vacuum as electrode. Copper clad tin oxide with high purity and large diameter is used as lead wire at both ends. Epoxy resin is poured into both ends and yellow pet tape is used. 
It is widely used in high frequency, DC, AC and pulse circuits.

WEE Technology Company Limited - WEE are Capacitors Specialist

Due to the space of the capacitors, specially small size capacitors, sometimes manufacturers use code letter to save room of the marking.
Today, we would like to introduce the EIA/IEC/JIS Common Tolerance Codes about capacitors.

There are lots of code under this system, however J, K, M used most often.
Also, we should not follow the code table exactly, as some factories will have some change on their own.
Such as, WEE Technology use I for ±3%, some use H or E.
So, when you order some capacitors, you have to write down the not only the tolerance code, but also the numbers of each tolerance.

WEE Technology Company Limited - WEE are Capacitors Specialist

The dielectric polyethylene terephthalate (PET), better known as polyester, is the most common one. 
With this foil it is possible to create small dimensions, operating temperatures up to 125 °C as well as very good self-healing performance.

The medium voltage level up to 1000 V and the pulse handling capability combined with a broad value range are reasons why this product can be used in the majority of applications. 
Such as automotive, industrial, lighting, consumer and telecommunications

WEET WMB 630V 4.7uF +/-5% MKT Capacitors are wildly used in audio applications as well. 

WEE Technology Company Limited - WEE are Capacitors Specialist

Polyester film capacitor is often referred to as CL capacitor. Their common feature is that they are all wound with metallized polyester film, such as common CL21 capacitor, CL21X capacitor, CL20 axial capacitor, etc. 

What classification and function does metallized polyester film have? Here is a detailed introduction.

Metallized film is to evaporate aluminum or zinc aluminum to the surface of the film in vacuum. 
The material has high dielectric constant, high insulation resistance, good heat resistance and tensile resistance, which is suitable for making metallized polyester film capacitors.

Common classification of metallized polyester film:

Aluminum metallized polyester film with single side and single edge
Aluminum metallized polyester film with double side and single edge
Single side multi string aluminum metallized polyester film
Single side single edge zinc plus aluminum metallized polyester film

The characteristics of metallized polyester film capacitor are as follows:

It has the advantages of wide capacity range, small volume (smaller than polypropylene film capacitance), high temperature resistance (up to 120 ℃), light weight, relatively low price, good self-healing property. Some small capacity can be produced by series metallized film, with high pressure resistance, high temperature wax inner sealing, flame retardant epoxy powder sealing, stable moisture resistance and low noise.

The metallized polyester container has self-healing characteristics, that is, if there is a defect in the plastic film of the capacitor, it will break down when voltage is applied, then the metal film here will evaporate, and there will be no short circuit phenomenon, so that the capacitor can still work normally.

Disadvantages: metallized ester film capacitor is not resistant to high frequency, and the loss is larger at high frequency.

The function of metallized polyester film capacitor is as follows：

It is suitable for DC isolation, bypass and coupling. It is widely used in filtering low pulse circuit.

WEE Technology Company Limited - WEE are Capacitors Specialist

According to the media materials:Polypropylene PP, Polyester PET, Polyphenylene sulfide, Poly (naphthalene ethyl ester) PPS, PEN, Polystyrene PS, Polytetrafluoroethylene PTFE, Polycarbonate PC and paper, Acrylic resin

Paint film and so on.

According to the electrode: metal foil, metallization (also divided into aluminum, zinc, zinc aluminum, copper metallization), and the mixed form of the two

According to package: no package, epoxy resin package, plastic shell package, metal shell package, etc

WEET CL20 WMB Series 250V metallized polyester film flat axial capacitor (metallized polyester film capacitor), with metallized polyester film as medium and electrode, wrapped with flame retardant tape and sealed with epoxy resin, has excellent electrical performance, good reliability, high temperature resistance, small volume, large capacity and good self-healing performance. 
It is suitable for AC and DC circuits of instruments and household appliances, and widely used in audio system frequency division circuit.

WEE Technology Company Limited - WEE are Capacitors Specialist
WEET WMB 100V MET/MEA(CL20) Capacitors Cross Reference To jbCapacitors, CDE, Vishay and EPCOS TDK B32231

JFG - Axial Metallized Polyester & Polypropylene Film Capacitor

https://www.jbcapacitors.com/Plastic-Film-Capacitors/JFG-Axial-Metallized-Polyester-Polypropylene-Film-Capacitor.html

CDE / Illinois Capacitor
https://www.mouser.com/datasheet/2/88/MWR_series-553021.pdf

Vishay DC Film Capacitors MKT Axial Type MKT1813
https://www.vishay.com/docs/26013/mkt1813.pdf

EPCOS / TDK B32231 Series Film Capacitors
https://www.tdk-electronics.tdk.com/inf/20/20/db/fc_2009/B32231.pdf