There are many types of audio capacitors, such as WME, WMR, WMF, etc. To meet customer needs, we have launched the MER CL21 Multifunctional Metallized Polyester Film Capacitor.
CL21 MER Film Capacitor Specs:
| Capacitance range: | 0.001~15㎌ |
| Capacitance Tolerance: | ±5％，±10％ |
| Rated voltage Vdc: | 63V，100V，250V，400V，630V |
| Coating material: | Comply with UL94V-0 standard |
| L*T*H(mm) | 29mm*22.5mm*16mm |
CL21 MER Film Capacitor Applications:
Coupling of electronic circuits.
Bypass and energy storage application.
Audio related applications.
Summary:
CL21 MER Metallized Polyester Film Capacitor accept small-batch orders for this capacitor. Would you like to test the samples? We can also send the samples to you for free.
Contact us:Wallis@weetcap.com
WEE Technology Published on Sept 5, 2025
Haven't found a supplier for CL21 (MEF) Metallized Polyester Film Capacitor at a suitable price yet? Or do you need Cl21 metallized polyester film capacitor replacement?
WEET can provide all of these for you, you just need to visit our official website to select them! Products
CL21 MER Metallized Polyester Film Capacitor Key Specifications:
| Capacitance uF | Voltage V | Pitch size mm | L*T*H mm |
| 4.7 | 250 | 27 | 29*19.5*13.5 |
Climate: 40/105/56.
Capacitance range: 0.001㎌ - 15㎌.
Capacitance Tolerance: ±5％, ±10％.
Temperature range: -40℃〜+ 105℃.
Rated voltage Vdc: 63V, 100V, 250V, 400V, 630V.
Coating material: Comply with UL94V-0 standard.
WEE Technology, Our Only Business is Making Quality Capacitors. Please feel free to contact us if you have any needs!
Contact us:Wallis@weetcap.com
WEE Technology Published on Sept 4, 2025
Are you still looking for an audio film capacitor MER CL21 supplier? Perhaps the audio capacitor I am about to introduce below is exactly what you need!
CL21 MER Metallized Polyester Film Capacitor, MER are non-inductively wound with Metallized Polyester film as dielectric and electrode with copper-clad leads and epoxy resin coating
Polyester Film Capacitors For Audio CL21 250V 3.3uF (29mm*11mm*17.5mm)
Features:
Self-healing properties
Coating Type (Powder Encapsulation)
Flame retardant epoxy resin (UL 94V-0)
Available in loose boxes and loose poly bags
Main Applications:
Audio related applications
Coupling of electronic circuits
Bypass and energy storage applications
WEET Cheap Price Metallized Polyester Film Capacitor MER-CL21, and WEET offer custom services for our audio capacitors!
Would you like free samples? Please feel free to contact our team, and we will create a top-tier solution with favorable pricing for you.
Contact us:Wallis@weetcap.com
WEE Technology Published on Sept 3, 2025
The WEET CL21 MER Metallized Polyester Film Capacitor is one of the common models in the MER series, and its cost is affected by multiple factors such as raw materials, production processes, and performance parameters.
1. Core Raw Material Costs (Accounting for the Highest Proportion, Directly Determining the Basic Cost)
Metallized polyester film.
Lead materials.
Packaging materials.
2. Compliance and Certification Costs (High-Standard Certifications Increase Costs)
For consumer products: They only need to comply with China's GB standards and the EU's CE standards, resulting in relatively low certification costs.
For automotive electronics: Compliance with AEC-Q200 certification is required, which involves high costs.
Please refer to this image and its corresponding table:
| Capacitance uF | Voltage V | Pitch size mm | L*T*H mm |
| 2.2uF | 250V | 27 | 29*9*15.5 |
Summary:
WEET MER SERIES Metallized Polyester Film Capacitor CL21 accept small-batch orders and can also provide customization services.
Please feel free to contact us:Wallis@weetcap.com
WEE Technology Published on Sept 2, 2025
Have you ever encountered a failure of a Safety Ceramic Capacitor X2 Type?
Let's Explore the Failure Modes of X2 Capacitors Together: Symptoms and Failure Prevention Recommendations.
| Failure Mode | Core Mechanism | Key Symptoms |
| Open Circuit | Internal conductor/electrode breakage | No current flow; Equipment malfunction |
| Short Circuit | Dielectric breakdown | Excessive inrush current; May trigger circuit breaker tripping; in severe cases, the capacitor case may bulge, smoke, or even catch fire. |
| Parameter Drift | Film dielectric aging | Significant decrease in capacitor capacitance |
Failure Prevention Recommendations:
Component Selection Matching: Strictly select X2 capacitor application with appropriate specifications based on circuit operating conditions. Ensure that the rated voltage, rated temperature, and ripple current all meet the design requirements.
Environmental Control: Avoid prolonged exposure of capacitors to high-temperature environments, high-humidity environments or corrosive environments.
Electrical Protection: Add surge suppression components (such as varistors) and overload protection components to the circuit to reduce the impact of voltage spikes and overcurrents on Capacitors for Interference Suppression X2.
Regular Maintenance: For Class X2 Safety Capacitors in critical equipment, it is recommended to conduct electrical parameter testing once every 1–2 years to identify potential failure risks in advance.
Ending:
WEET, the Polypropylene Safety Capacitor X2 Factory, making Quality Capacitors is Our Only Business.
Should you have any requirements, please feel free to contact our team at any time. We will tailor a high-cost-performance and exclusive solution for you based on your actual situation!
WEE Technology Published on Aug 27, 2025
Small Loss X2 Safety Capacitor 310V Anti Interference, are quite common in our daily lives, such as in air conditioners, routers, frequency converters, and so on... But do you know about their structural and material characteristics?
X2 Safety Capacitors Structural and Material Characteristics:
Dielectric Material: Metallized polypropylene film is mostly used. This material features low dielectric loss, excellent insulation performance, and strong voltage impact resistance.
Electrode Structure: Formed by winding metallized films.
Shell and Encapsulation: The common shell material is flame-retardant epoxy resin (meeting UL94 V-0 flame-retardant standard), which has the properties of high temperature resistance, moisture resistance, and mechanical impact resistance.
Notes:
If you intend to purchase, you must choose products that have passed international safety certifications:
USA: UL Certification.
China: CQC Certification.
German Institute of Electrical Engineers: VED Certification.
European Committee for Electrotechnical Standardization: ENEC Certification.
International Electrotechnical Commission: IEC 60384-14 Certification
WEET Class X2 Safety Capacitors have passed rigorous testing and obtained relevant certifications, ensuring reliability for your purchase. If you still have concerns regarding pricing, we are also able to arrange the free delivery of samples for your evaluation.
Contact us:Wallis@weetcap.com
Suppression X2 Capacitor for Frequency Converter
WEE Technology Published on Aug 26, 2025
Do you know the characteristics and application fields of X2 capacitors?
X2 Metallized Polypropylene Film Capacitors, also known as Class X2 Interference Suppression Safety Capacitors.
Safety X2 Capacitor Features:
Non inductive structure, using UL94 V-0 grade plastic shell and epoxy resin sealing.
Capable of interference suppression and certified by VDE,CQC, ENEC, KC, and UL.
Suitable for cross line interference suppression circuits.
Safety X2 Capacitor Application:
Household Appliances: Washing machines, air conditioners, microwave ovens, etc., to prevent equipment from interfering with the power grid or surrounding electrical appliances.
Power Supply Equipment: Switching power supplies (chargers, adapters) and power filters, used to suppress interference in power supply lines.
Consumer Electronics: Computers, TVs, printers, to ensure stable operation of equipment and reduce signal interference.
Industrial Equipment: Frequency converters and servo drives, adapted to industrial environments and resistant to strong electromagnetic interference.
WEET, The Quality X2 Safety Capacitor manufacturer supply. Please feel free to contact us if you have any needs. Still hesitating? We can also apply to send you samples for free!
Contact Us:Wallis@weetcap.com
WEE Technology Published on Aug 25, 2025
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