Metallized Polyester Capacitors

Metallized polyester capacitors is to evaporate a layer of metal film on the surface of polyester film instead of metal foil as an electrode, because the thickness of the metallized film layer is much smaller than the thickness of the metal foil, so the volume after winding is also smaller than that of the metal foil capacitor. much smaller. The biggest advantage of metallized film capacitors is the “self-healing” characteristic. The so-called self-healing characteristic is that if the film medium has a defect at a certain point and a breakdown short circuit occurs under the action of overvoltage, the metallization layer at the breakdown point can be melted and evaporated instantly under the action of an arc to form a small metal-free area. , so that the two pole pieces of the capacitor are re-insulated from each other and can still continue to work, thus greatly improving the reliability of the Metallized polyester capacitors.

As conducting electrodes, tiny layers of aluminum (about 0.03 m) are vacuum-deposited on the insulating film in the case of metallized capacitors. When there is a breakdown, the thin metal coating around the failure spot evaporates due to the short circuit current, creating an insulating region.

Features of Metallized polyester capacitors

1. Wide working temperature range: the general temperature range can reach -40℃~120℃.

2. Large dielectric constant.

3. Good self-healing properties.

4. The volume ratio is large, that is, the volume can be made smaller, and the installation does not take up space.

5. Good stability.

The role of metallized polyester film capacitors: Metallized polyester capacitors are mainly used in DC blocking and coupling, decoupling, filtering, timing, and low pulse circuits.

Features and Usage

1)This is constructed from metalized polyester film dielectric, non-inductive construction.

2)Epoxy resin coating, radial CP wire.

3) excellent self-healing property, high insulation res-instance, and stability of capacitance.

4) suitable for DC and pulse circuits, ideal for use in filtering, blocking, by-pass, coupling, and noise suppression circuits for various electronic equipment.

Wound with metalized polyester film, high self-healing effect, high temperature, some small capacity can be used in the series film, high voltage, high-temperature wax seal, flame retardant liquid epoxy potting, high reliability, minimal error, stable outlookmoisture resistant, low noise, appearance, and good consistency.

Application

1.Coupling decoupling by-passing and timing circuit
2.Automatic control systems, communication equipment
3.Charging/discharging, lighting, noise suppression and frequency modulation

Specifications

Dielectric: Polyester film

Electrodes: Vacuum evaporated metal

Coating: Out wrapped with Mylar tape and ends sealed with epoxy resin

Leads: Axial leads of tinned wire

Reference standard: IEC 384-2 grade 1; SJ/T 10873-1996

Climatic catalogue: 40/85/21 (From 85 up to 105°C with derating voltage 1.25%/°C)

Capacitance tolerance: M=±20%, K=±10%, J=±5%

Dissipation factor (tangent of loss): C≤1.0uF DF ≤0.8%

C>1.0uF DF ≤1%  (at 20°C, 1kHz)

Voltage-proof: 1.6*UR Unit:VDC (5s at 20°C)

Insulation resistance:

C≤0.33uF IR: ≥15,000MΩ

C>0.33uF IR*C: ≥3,000S (1 minute at 20°C and RH≤65%)

Endurance:

1,000 hours with 150% of rated voltage at 85°C

After the test: ∆C/C ≤8%, ∆DF≤0.30%(C>1 uF);

∆DF≤0.50%(C≤1 uF);

IR ≥0.5% of the specified value (20°C, 1kHz)

1. More than 1000,000 own stock inventory to meet your needs for different products.

We specialize in various types of Modules. Active electronic components(Integrated Circuits, Relay, Sensors, etc)and Passive electronic components (Filter, Magnetic Bead. Diodes, Transistors, Capacitors, Resistors, Inductors, etc) over 15 years.

2. Competitive price advantage helps to save your purchase cost and your precious time.

We wholesale and distribute new, original &famous brand Electronic Components all over the world.

3. Own the international advanced testing equipment of electronic components and scientific storage system to ensure quality stability.

4. Excellent elite team, more than 6 years of seniority, and a good understanding of international market trends.

Product Feature: This product is ultra-small, self-healing, high temperature, a small capacity available in series production of metalized film, high pressure, high-temperature wax seal, flame retardant epoxy powder coating, moisture stable performance, low noise, appearance consistency. YTF’s facility spans 150,000 square meters and the number of employees with an average tenure of more than 15 years has surpassed 1200. The plant can produce 800 million high-frequency low-impedance electrolytic capacitors and 300 million high-voltage capacitors every month.

Metalized Capacitors are widely used for DC pulsation, pulse, and AC voltage reduction in instruments, meters, TV sets, and household electrical appliances. Metalized capacitors are available with different values of general and value ratings. We are looking for bulk inquiries for Metallized polyester film and MEA Series axial capacitors.