Capacitance:0.001UF —-68UF Tolerance:+-5%, +-10% Place of Origin: Type:Polypropylene Film Capacitor Rated Voltage:100V, 250V, 400V, 630V Operating Temperature:-40℃ to 110℃ Voltage – Rated:250VAC, , 400VAC Circuit Type:Isolated Temperature Coefficient:40/110/21 Color:Yellow or as you wish Material:Metalized Polypropylene Size:Custom Size
Organic film capacitors are made of polypropylene film, polyester film (PET), polyphenylene sulfide film (PPS), polycarbonate film (PC), polyphenylene naphthalene film (PEN), and polyvinylidene fluoride film ( Capacitors made of dielectric materials, such as PVDF, are one of the electronic components with excellent performance, variety, and wide application. They have experienced the development process of inductive, non-inductive, metallized, laminated, and surface-mounted.
1.Non-inductive construction and self-healing
2.Low DF and high IR
3.High capacitance value available and compact size
1. Characteristics of polyester film capacitors: 1) Small volume and large capacity, especially metalized polyester film capacitors have smaller volume. 2) Wide operating temperature range: -55C to + 100C. (Polypropylene capacitor: -40 ~ + 85C) 3) Positive temperature coefficient capacitor 4) The loss tanδ increases with frequency, so it is not suitable for high-frequency circuits.
2. Features of polypropylene film capacitors: 1) Very low high-frequency loss tanδ≤0.1%, (polyester capacitor tanδ≤1.0%). And the loss change is very small in a wide frequency range, suitable for high-frequency circuits. (Within 100KHz) 2) small negative temperature coefficient; 3) Very high insulation resistance (IR≥10 MΩ); 4) High dielectric strength, suitable for high voltage film capacitors. In summary, polypropylene capacitors are capacitors with excellent performance that are very close to ideal capacitors, so they are also more expensive.
3． Features of metallized film capacitors: Metallized film capacitor is a layer of metal film on the surface of the polyester film instead of metal foil as the 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 larger than the metal foil type capacitor Much smaller. The biggest advantage of metallized film capacitors is the “self-healing” characteristic. The so-called self-healing property is that if a thin film medium has a defect at a certain point and a short-circuit occurs under the action of an overvoltage, the metallized layer at the breakdown point can be instantly melted and evaporated under the action of an arc to form a small metal-free area. , The two pole pieces of the capacitor are insulated from each other again and can continue to work, so the reliability of the capacitor operation is greatly improved. In principle, there should be no short-circuit failure mode for metallized film capacitors, and metal foil capacitors will have many short-circuit failure phenomena.
4． Film / foil composite series capacitor: This type of capacitor structure uses metal foil as the electrode and metallized polyester film as the internal series connection film. This type of capacitor has both the high current characteristics of aluminum foil capacitors and the self-healing characteristics of metalized capacitors. Its series structure It is equivalent to two internal capacitors connected in series, which is equivalent to: Therefore, the withstand voltage of the capacitor can be doubled. The high-voltage polypropylene capacitor CBB81 series has such a structure, and is widely used in TV and MONITOR’s line reverse circuit.
5． X2 AC film capacitor This type of capacitor is used for the X circuit of the whole machine to suppress the electromagnetic interference of the power supply. It works in the power frequency AC circuit. This capacitor does not allow failure modes such as short circuit and fire caused by abnormal fluctuations in the power supply. The capacitor has a low melting point aluminum-zinc metallized film in the process structure, and is encapsulated with an epoxy resin and a plastic shell that meet the UL94 / V-0 level flame retardant performance, so it can be guaranteed during instantaneous breakdown. Very fast self-healing and flame retardant properties. Therefore, in the power supply interference suppression circuit, AC film capacitors that have been certified by the national statutory certification agency must be used instead of DC type capacitors.
1. Divided by media materials: China currently uses two types of media: polyester film and polypropylene film;
2. Distinguish according to winding mode: there are two modes: sensible winding and non-inductive winding;
3． Divided by electrode type: There are two structures of metal foil type and metallized film.