Before you choose and purchase the CL21B MKT box-type metallized polyester film capacitor, please take a look at this article. It may be of help to you.
Manufacturer: WEET
Product Type: Metallized Polyester Film Capacitor
Series: CL21B = WFD
Shipping: Ex-Work Dongguan, FOB Shenzhen, For by FedEx UPS DHL express.
MOQ: 1000PCS
Lead Time: 2 weeks.
Price: Quoted by specific request with best offer.
Tₘₐₓ: +85°C
Tₘᵢₙ: -40°C
Rated Voltage: 63V, 100V, 160V, 250V, 400V, 630V.DC
Capacitance Tolerance: ±5%, ±10%, ±20%
Features:
plastic case and epoxy resin, non-inductive.
High reliability.
Box type provide the identical outer appearance.
Cut leads, Bulk, Ammo Tape Package, Long leads are available.
Datasheet: WEET-WFD-MKT-Box-Type-Metallized-Polyester-Film-Capacitor-CL21B
If you have a need but haven't decided to place an order yet, we can send you free samples — this will let you experience firsthand that choosing us is absolutely worthwhile.
Contact us:Wallis@weetcap.com
WEE Technology Published on Aug 8, 2025
Two capacitors with the same red appearance, CBB21 and CL21, what are the differences?
Difference in volume:
Due to the use of polyester film material, CL21 is smaller in volume and lighter in weight than CBB21.
In contrast, CBB21 is slightly larger in volume.
Difference in material:
CBB21 is a metallized polypropylene film capacitor, which is made by winding polypropylene film.
CL21 is a metallized polyester film capacitor, manufactured by winding polyester film.
Difference in stability:
CBB21 has better stability, and the range of its capacitance change with temperature is smaller than that of CL21.
CL21 has slightly poorer stability, especially in high-frequency situations, which is one of the reasons why CL21 cannot generally be used in high-frequency circuits.
Difference in application:
CBB21 is widely used in high-frequency, DC, AC and pulse circuits, and is suitable for various high-frequency and large-current occasions.
CL21 is suitable for DC blocking, bypassing and coupling of DC and VHF-level signals, and is widely used in filtering and low-pulse circuits.
Find more details: WEET WFA CL21 Dip Coated MKT Metallized Polyester Film Capacitor
WEET WFB CBB21 Epoxy PP MKP Metallized Polypropylene Film Capacitor
If you have any needs, please feel free to contact our sales team, and we will be happy to serve you.
Contact information:Wallis@weetcap.com
WEE Technology Published on Aug 7, 2025
In the previous article, WEET have introduced Metallized Polyester Film WFA and WFB, which also belong to metallized polyester film capacitors. Today, WEET will showcase another product - WEET WFD CL21B MKT Box Type Metallized Polyester Film Capacitor.
Box Type Metallized Polyester Film Capacitor Features - WFD CL21B
Box type provides the identical outer appearance.
Non-inductive, plastic case and epoxy resin.
Cut leads, Bulk, Ammo Tape Package, Long leads are available.
Box Type Metallized Polyester Film Capacitor Some Details - WFD CL21B
Operating Temperature: -40℃ ~ +85℃
Capacitance Range: 0.001 ~ 2.2μF
Climatic Category: 40/85/21
Why Choose WEET?
Choosing us means choosing quality, reliability, and a commitment to your satisfaction.
Premium Quality, Fair Prices: With more than 20 years of experience in the industry, We never compromise on quality.
Customer-Centric Service: Your success is our priority, we’re here to listen, adapt, and go the extra mile to resolve any issues promptly.
PDF:https://weetcap.com/pdf/WEET-WFD-MKT-Box-Type-Metallized-Polyester-Film-Capacitor-CL21B.pdf
WEE Technology Published on Aug 6, 2025
What is WEET WFB CBB21 Epoxy PP MKP Metallized Polypropylene Film Capacitor?
In this article, I will discuss it from its characteristics and application fields.
WFB PP Metallized Polypropylene Film Capacitor Characteristics:
Non-inductive, epoxy dip coated, high moisture resistance.
Dissipation factor is normally low and it is stable against high frequency and change of temperature.
Recommended for high-frequency circuits like s-curve compensating circuit. High reliability because of its excellent Self-Healing performance.
WFB PP Metallized Polypropylene Film Capacitor Application Fields:
Lighting field: Widely used in various lamps, such as LED lamps, fluorescent lamps, etc.
Household appliances: In household appliances such as TV sets, washing machines, air conditioners, etc.
Communication equipment: Suitable for high-frequency circuits in communication equipment.
Industrial control: Used in equipment such as motor drives, frequency converters, and servo controllers in industrial control systems.
PDF:https://weetcap.com/pdf/WEET-WFB-Epoxy-PP-MKP-Metallized-Polypropylene-Film-Capacitor-CBB21.pdf
WEE Technology Published on Aug 5, 2025
WEET WFA CL21 Dip Coated MKT Metallized Polyester Film Capacitor is a common electronic component, which features a wide capacitance range, small size, low loss, high insulation resistance, and good temperature stability.
Compared with other types of capacitors (such as ceramic capacitors, electrolytic capacitors, polypropylene film capacitors, etc.), metallized polyester film capacitors have unique performance advantages, which are specifically reflected in the following aspects:
1.Strong self-healing ability and high reliability
This is one of the most prominent advantages of metallized polyester film capacitors.
2.Non-polar with a wide range of applications
Metallized polyester film capacitors are non-polar, whereas electrolytic capacitors (aluminum electrolytic and tantalum electrolytic) have distinct polarities.
3.Low loss and good high-frequency performance
The dielectric loss of metallized polyester film is low, resulting in little energy loss in medium and high-frequency circuits.
4.Good temperature stability
The temperature coefficient of polyester film is relatively stable. In contrast, some ceramic capacitors have poor temperature stability, with their capacitance changing by up to ±80% with temperature.
Click the link for more information:https://www.weetcap.com/Plastic-Film-Capacitors/WEET-WFA-CL21-Dip-Coated-MKT-Metallized-Polyester-Film-Capacitor.html
Or feel free to contact our sales team at any time:Wallis@weetcap.com
WEE Technology Published on Aug 4, 2025
In audio systems, the CBB19 capacitor is truly a key component for enhancing sound quality.
And what I'm going to introduce to you today is the WEET WMC MKP CBB19 Metallized Polypropylene Film Capacitor.
For low-frequency signals, it can make them more profound and full; For high-frequency signals, it can render them clearer and more delicate, reproducing the subtle details in the music.
Specifications:
| Operating Temperature: | -55℃~ +100℃ |
| Rated Voltage: | 250V, 400V, 630V, 1000V, 1250V.DC |
| Features: | High-purity and large-diameter copper oxide tin coated welding at both ends as the lead, wrapped with flame retardant tape and sealed with epoxy resin. |
| Advantage: | It has excellent electrical performance, high reliability, high temperature resistance, small volume, large capacity and good self-healing performance. |
Special note:
For 1250V, we adopt different series construction to assure the high voltage.
The tape and epoxy color could be customized based on customers request.
We accept OEM, please feel free to check with our sales engineers for more details.
Contact us:Wallis@weetcap.com
WEE Technology Published on Jul 25, 2025
Un condensador de seguridad es un tipo de condensador utilizado para suprimir la interferencia electromagnética, reducir la resistencia y el voltaje de capacitancia, y el filtrado de CC. Pertenece a un tipo de condensador de seguridad, específicamente un condensador de seguridad de película delgada metalizada. Según los diferentes niveles de tensión de resistencia, se puede dividir en tres tipos: X1, X2 y X3, siendo X2 el más común.
Pero, ¿conoces la manifestación del modo de falla del condensador X2 dañado?
0.47uF P15mm 310VAC Capacitador de película de clase X2
1. anormalidad de apariencia:
Cuando la Clase X2 Radial MKP 310 VAC - Standard Across the Line está dañada, puede haber cambios de apariencia obvios como grietas, quemaduras, abultamientos, etc. El agrietamiento puede ser causado por sobrevoltaje, impacto de sobrecorriente, etc., lo que daña la estructura del condensador; La quema indica que el condensador ha experimentado sobrecalentamiento, posiblemente debido a un funcionamiento anormal prolongado; El bulto es causado por un aumento de la presión interna, lo que da como resultado la deformación de la carcasa del condensador.
2.Cambios en el rendimiento eléctrico:
Los cambios en el valor de capacitancia de los condensadores certificados de seguridad de la clase X2, ya sean más grandes o más pequeños, pueden afectar al funcionamiento normal del circuito. Por ejemplo, en un circuito de filtrado, un cambio en la capacitancia puede conducir a una disminución en el efecto de filtrado y un aumento en el desorden en el circuito. Si se produce un cortocircuito, causará un aumento anormal en la corriente del circuito, lo que puede llevar a daños a otros componentes. Si el condensador de seguridad X2 con resistencia de descarga está completamente abierto, es equivalente a una interrupción de circuito en la ubicación donde se encuentra el condensador en el circuito, y no se pueden realizar las funciones de circuito relevantes.
3.Causar un mal funcionamiento del circuito:
En algunos circuitos que requieren una alta estabilidad, el daño a los condensadores de seguridad puede conducir a un funcionamiento inestable del circuito y fallas intermitentes. Por ejemplo, en los circuitos de alimentación en modo conmutador, los fallos de los condensadores X2 para requisitos de alta temperatura pueden causar fluctuaciones significativas en el voltaje de salida, afectando la alimentación normal de los dispositivos de fondo. En casos graves, incluso puede causar que todo el dispositivo no se inicie, ya que los condensadores de seguridad desempeñan un papel crítico en el circuito, y su daño puede interrumpir las condiciones normales de trabajo del circuito.
WEE Technology Published on May 23, 2025
A safety capacitor is a type of capacitor used for suppressing electromagnetic interference, reducing resistance and capacitance voltage, and DC filtering. It belongs to a type of safety capacitor, specifically a metalized thin film safety capacitor. According to different withstand voltage levels, it can be divided into three types: X1, X2, and X3, with X2 being the most common.
But do you know the manifestation of the damaged X2 capacitor failure mode?
1、 Appearance abnormality:
When the Class X2 Radial MKP 310 VAC - Standard Across the Line is damaged, there may be obvious appearance changes such as cracking, burning, bulging, etc. Cracking may be caused by overvoltage, overcurrent impact, etc., which damage the structure of the capacitor; Burning indicates that the capacitor has experienced overheating, possibly due to prolonged abnormal operation; Bulging is caused by an increase in internal pressure, resulting in deformation of the capacitor casing.
2、 Changes in electrical performance:
Changes in the capacitance value of X2 Class Safety Certified Capacitors, whether they become larger or smaller, can affect the normal operation of the circuit. For example, in a filtering circuit, a change in capacitance may lead to a decrease in filtering effect and an increase in clutter in the circuit. If a short circuit occurs, it will cause an abnormal increase in circuit current, which may lead to damage to other components. If the X2 Safety Capacitor with Discharge Resistor is completely open, it is equivalent to a circuit break at the location where the capacitor is located in the circuit, and the relevant circuit functions cannot be realized.
3、 Causing circuit malfunction:
In some circuits that require high stability, damage to safety capacitors may lead to unstable circuit operation and intermittent faults. For example, in switch mode power supply circuits, X2 capacitors for high-temperature requirements faults may cause significant fluctuations in output voltage, affecting the normal power supply of backend devices. In severe cases, it can even cause the entire device to fail to start, as safety capacitors play a critical role in the circuit, and their damage can disrupt the normal working conditions of the circuit.
WEE Technology Published on May 23, 2025
1、¿Cuál es el método de prueba de corriente de fuga de tres artículos del condensador de seguridad X2?
El método de prueba de corriente de fuga de tres elementos para el condensador de supresión EMI X2 310V para medidor de potencia se refiere al método de evaluar la situación de fuga del equipo eléctrico de condensador de seguridad X2 mediante la realización de pruebas de corriente de fuga de tres elementos hacia adelante, hacia atrás y CA.
2、 Pasos para tres pruebas de corriente de fuga de condensadores X2 para el medidor de energía del medidor de potencia.
Preparar los instrumentos de prueba: Seleccione los instrumentos de prueba apropiados y asegure su calibración y funcionamiento adecuado.
Conecte el circuito de prueba: De acuerdo con los requisitos del instrumento de prueba, conecte correctamente el equipo eléctrico a los circuitos de corriente frontal, inversa y CA del instrumento de prueba.
Aplique la tensión nominal: Aplique la tensión correcta al circuito de prueba de acuerdo con la tensión nominal del equipo eléctrico.
Realice pruebas: De acuerdo con las instrucciones de funcionamiento del instrumento de prueba, realice pruebas de corriente de fuga hacia adelante, hacia atrás y CA.
Registre los resultados de la prueba: Registre el valor de la corriente de fuga mostrado por el instrumento de prueba, y analizarlo y compararlo.
Determine si está calificado: De acuerdo con las normas nacionales o las regulaciones relevantes, determine si la corriente de fuga del equipo eléctrico MPX X2 Passo 27.5mm de 2.2uF 310VAC del condensador está dentro del rango calificado.
3、 La importancia de tres pruebas de corriente de fuga para el condensador de película de caja de clase X2 de 310V AC.
Los tres métodos de prueba de corriente de fugas de las regulaciones de seguridad pueden ayudar a evaluar la situación de fugas de los condensadores de seguridad X2 para equipos eléctricos THB 85C, descubrir y resolver oportunamente posibles riesgos de seguridad y garantizar la seguridad de las personas y la propiedad. Las pruebas regulares de corriente de fuga del condensador de seguridad X2 pueden mejorar la seguridad y la fiabilidad de los equipos eléctricos y reducir la ocurrencia de accidentes.
WEE Technology Published on May 23, 2025
1、 What is the safety capacitor X2 three item leakage current testing method?
The three item leakage current testing method for EMI Suppression X2 Capacitor 310V for Power Meter refers to the method of evaluating the leakage situation of safety capacitor X2 electrical equipment by conducting forward, reverse, and AC three item leakage current tests.
2、 Steps for Three Leakage Current Tests of X2 capacitors for power meter energy meter.
Prepare testing instruments: Select appropriate testing instruments and ensure their calibration and proper functioning.
Connect the test circuit: According to the requirements of the testing instrument, correctly connect the electrical equipment to the forward, reverse, and AC current circuits of the testing instrument.
Apply rated voltage: Apply the correct voltage to the test circuit according to the rated voltage of the electrical equipment.
Conduct testing: According to the operating instructions of the testing instrument, perform forward, reverse, and AC leakage current tests.
Record the test results: Record the leakage current value displayed by the testing instrument, and analyze and compare it.
Determine whether it is qualified: According to national standards or relevant regulations, determine whether the leakage current of the CONDENSATORE 2.2uF 310VAC MPX X2 Passo 27.5mm electrical equipment is within the qualified range.
3、 The significance of three leakage current tests for 310V AC class X2 box film capacitor.
The three leakage current testing methods of safety regulations can help evaluate the leakage situation of Heavy Duty X2 Safety Capacitors for Power Meter THB 85C electrical equipment, timely discover and solve potential safety hazards, and ensure the safety of people and property. Regular leakage current testing of safety capacitor X2 can improve the safety and reliability of electrical equipment and reduce the occurrence of accidents.
WEE Technology Published on May 23, 2025