Foil Capacitors

This is high voltage and long-term ability capacitor.Capacitors with a lower capacitance value are often built using a film/foil structure. The insulating layer is always thicker than what is theoretically required by the numbers derived from the breakdown strength of the material in order to prevent breakdowns brought on by weak areas in the dielectric. Polypropylene (PP) capacitors are employed in high-frequency technology.

Category Farad capacitors

Product Description

Foil Capacitors Specifications:

Dielectric	Polypropylene film
Electrodes	Aluminum foil as outer electrodes and vacuum evaporated metal layer as inner series electrode
Coating	Epoxy resin coating
Leads	Radial leads of tinned wire
Reference standard	IEC 384-17; GB 14579-1993
Climatic catalogue	40/85/21
Capacitance versus rated voltage (UR)	0.001μF-0.10μF/1000VDC 0.001μF-0.047μF/1600VDC 0.001μF-0.022uF/2000VDC
Capacitance tolerance	M = ±20%, K = ±10%, and J = ±5%
Dissipation factor	DF≤1.0% (at 20°C, 1KHz)
Voltage-proof	2.0*UR Unit:VDC (1 minute at 20°C)
Insulation resistance	C≤0.1µF, IR≥30000MΩ, C>0.1µF, 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 ≤10%; ΔDF ≤0.30%, IR ≥50% of the specified value (20°C 1kHz)

Introducation of Foil Capacitors:
In more traditional applications, such as filters and audio crossovers, film capacitors can be employed as voltage-smoothing capacitors. When necessary, they can be utilized to store energy and release it in the form of a high-current pulse. Pulsed lasers and electrical discharge lights are both powered by high-current electrical pulses.

Films made of polyester, polypropylene, and other materials are shaped into cylinders and placed between the electrode foils on both sides. These nonpolar capacitors have high insulating resistance, and low dielectric loss, and are nonpolar. They also have favorable temperature and frequency properties.

Feature:

1.High stability of capacitance and DF versus temperature and frequency
2.High voltage and long-term ability
3.High pulse rise rate(du/dt) and suitable for large current circuit

Capacitors with a lower capacitance value are often built using a film/foil structure. The simple contactability of the metal foil electrodes and the strong pulse are two benefits of this building concept. The insulating layer is always thicker than what is theoretically required by the numbers derived from the particular breakdown strength of the material in order to prevent breakdowns brought on by weak areas in the dielectric.

Two dielectric types of film/foil capacitors in the 5 mm to 15 mm range are offered.

Polyester (PET) capacitors are appropriate for a variety of uses, including coupling, decoupling, and by-passing. Capacitors made of polypropylene (PP) are employed in high-frequency technology. Resonant circuits, power sources, deflection circuits, oscillator circuits, and audio equipment are all included in this.
film/foil capacitors in PCM 5 mm to 15 mm are available with capacitance values from 33 pF to 0.22 µF and rated voltages from 63 VDC to 1000 VDC.

Application:

1.Most suitable for high voltage and pluse in the horizontal resonance circuit of colour TV set