What are the characteristics of metallized film capacitors?

Introduction:

The film capacitor has many excellent characteristics and is a capacitor with excellent performance. Its main characteristics: non-polar, high insulation resistance, excellent frequency characteristics (wide frequency response), and small dielectric loss. Therefore, film capacitors are widely used in analog circuits. Especially in the part where the signal is connected, a capacitor with good frequency characteristics and extremely low dielectric loss must be used to ensure that the signal does not have too much distortion when it is transmitted. Among all plastic film capacitors, the characteristics of PP capacitors and PS capacitors are the most significant, and the price is relatively high. In recent years, in order to improve the sound quality of audio equipment, the quality of parts and materials used is high, and the price is not the most important consideration. Therefore, in recent years, the frequency and quantity of PP capacitors and PS capacitors used in audio equipment have become higher and higher.

Category:

Common film capacitors are produced by winding metal foils such as aluminum as an electrode and a plastic film. But another film capacitor has a manufacturing method called Metallized Film. The method is to vacuum deposit a thin layer of metal on a plastic film as an electrode. In this way, the thickness of the electrode foil can be omitted, and the volume per unit capacity of the capacitor can be reduced. Therefore, the film capacitor can be easily made into a small and large capacitor. For example, the common MKP capacitor is the code name of Metallized Polypropylene Film Capacitor, and MKT is the code name of Metallized Polyester.

Characteristic:

1. Good heat resistance, the rated working temperature is 70 ℃, and the maximum working temperature can reach 155 ℃.

2. Good voltage stability and small temperature coefficient.

3. It is widely used in AC, DC and pulse circuits.

Features:

Metal film capacitors are non-inductive, using polyester film as the dielectric and aluminum foil as the electrode winding, tin-plated copper-clad steel wire with epoxy resin encapsulation.

1. Stable and reliable;

2. The non-inductive structure minimizes the loss factor;

3. Excellent environmental performance.

4. ESR is low.

Skills requirement:

Rated temperature: -40 ℃ ~~ + 85 ℃;

Rated voltage: 100V, 250V, 400V, 630V;

Capacitance range: 0.001UF ~~ 0.47UF;

Capacitance deviation: ± 5% (J), ± 10% (K), ± 20% (M);

Loss tangent angle: 1.0% (max) at 1KHz;

Withstand voltage: Teminal to (at20 ± 5 ℃);

This product is ideal for industrial and commercial equipment that requires small signal circuits to reduce noise.

Feature:

High resistance, good solderability and self-recovering properties, miniaturization saves space in size.

Specification:

Working temperature: -40 ℃ ~~ + 85 ℃;

Capacitance range: 0.01UF ~~ 10UF;

Capacitance tolerance: ± 5% (J), ± 10% (K), ± 20% (M);

Rated voltage: 100V, 250V, 400V, 630V;

Loss tangent angle: 1.0% (max) at 1KHz;

Withstand voltage: Teminal to (at20 ± 5 ℃);

This product is suitable for coupling, filtering, rectifying and timing circuits, and is widely used in remote communication, data processing, industrial instrumentation and automatic control system equipment.