Plastic Film Capacitor

Feature:

The metallized film capacitor is to evaporate a metal film on the surface of the polyester film instead of the metal foil as the electrode. Because the thickness of the metallized film layer is much smaller than the thickness of the metal foil, 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” feature. The so-called self-healing property means that if the film dielectric has a defect at a certain point and a breakdown short circuit occurs under the action of overvoltage, the metallized layer of the breakdown point can be instantly melted and evaporated under the action of the 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 capacitor’s operation. In principle, metallized film capacitors should not have short-circuit failure modes, while metal foil capacitors will have many short-circuit failures.

Application:

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

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)