Metallized Polypropylene Film Capacitors

Metallized polypropylene film capacitors structural advantages details:

1. The main circuit inside the movement adopts the process structure of copper strip bridge, the thickness of copper strip is guaranteed, the main circuit has strong flow capacity, and the temperature rise of copper strip is low. The installation operation is simple, convenient, fast and efficient, greatly reducing the chance of error.

2. The main circuit of Metallized polypropylene film capacitors only needs two copper strips, which replaces a large piece of PCB in the past, which greatly reduces the cost of product materials and labor costs, and improves product reliability. Eliminates PCB plug-in, tin furnace, repair soldering and other processes.

3. The main circuit is separated from the drive control part to achieve separation of strong current and weak current. Reduce the interference of the main resonant tank to the driver part of the chip. It brings convenience to the after-sales maintenance of the product, the components can be used again, and the maintenance cost is reduced.

4. Since the metallized polypropylene film capacitors are all packaged in the form of modules, the aluminum shell can be used to dissipate heat, and the movement can be fully sealed. It solves the problem of oil fume, water vapor, cockroaches, metal dust, etc. entering the movement, and improves the reliability and service life of the product.

5. Metallized polypropylene film capacitors are changed from multiple discrete parallel connections to a single module form, which solves the problems of uneven overcurrent and uneven voltage division of discrete capacitors, shortens the line distance of the main circuit, and reduces the impact of line distributed inductance. influence of power components.

Metallized Polypropylene Film Capacitors introduction

The usual method of making film capacitors is to use a metal foil such as aluminum as an electrode and a plastic film to overlap and then roll them together. However, there is another manufacturing method for film capacitors, which is called metallized film. In this way, the thickness of the electrode foil can be omitted, and the volume of the unit capacity of the capacitor can be reduced, so the film capacitor can be easily made into a small capacitor with a large capacity. For example, the common MKP capacitor is the representative name of metallized polypropylene film capacitor, and MKT is the representative name of metallized polyethylene capacitor.

Now a large number of low-end film manufacturers have appeared on the market. Some capacitor manufacturers choose this cheap and inferior metallized film in order to fight the price war. Although this film is cheap, it is prone to dielectric, mechanical damage and pinholes. , low cleanliness and other problems, so that when using, the metal film defects are easily broken down, resulting in the final damage of the film capacitor.

Metallized Polypropylene Film Capacitors Specifications:

Dielectric: Polypropylene film

Electrodes: Vacuum evaporated metal or Aluminum foil

Coating: Encapsulated in reinforced flame retardant plastic case sealed with epoxy resin meeting the requirement of UL 94V-0

Leads: Axial leads of tinned wire

Reference standard: IEC 384-16; GB 10190-1988

Climatic catalogue: 40/85/21

Capacitance versus rated voltage (UR):

0.001 µF-2.2 µF/100VDC

0.001 µF-2.2 µF/250VDC

0.001 µF-2.2 µF/400VDC

0.001 µF-2.2 µF/630VDC

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

Dissipation factor: DF≤1.0% (at 20°C, 1KHz)

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

Insulation resistance: C≤0.33µF, IR≥30000MΩ, C>0.33µF, IR*C≥5,000s (1 minute at 20°C and R≤65%)

Endurance: 1000 hours with 125% of rated voltage at 85°C. After the test:

ΔC/C ≤5%; ΔDF ≤0.40%, IR ≥50% of the specified value (20°C, 1kHz)

Feature:

1.Non-inductive construction and self-healing
2.High property moisture resistance
3.Super physical and environmental characteristics

Application:

1.Filter and noise suppression circuit
2.Pulse, logic and timing circuit
3.DC-blocking, by-passing and signal coupling in general communications

With the development of technology level, the replacement cycle of electronics, home appliances, communications and other industries is getting shorter and shorter, and film capacitors have become an indispensable electronic component to promote the replacement of the above industries with their good electrical performance and high reliability.