Mylar VS Polyester Film Capacitor

Mylar VS polyester film capacitor adopts polyester film as medium, and uses vacuum evaporation method to deposit aluminum on the film for electrode winding, the wire adopts tinned copper-clad steel wire (or soft wire), the outer layer is wrapped with polyester tape, and both ends are sealed with epoxy resin. It is suitable for DC or pulsating circuit of electronic equipment.

Due to the electrical impedance of a suppression capacitor decreasing with frequency, they are an efficient component for reducing interference because at higher frequencies, they short circuit electrical noise and transients between the lines or to ground. As a result, they shield machinery and equipment from electromagnetic and radio frequency interference as well as transients in across-the-line (X capacitors) and line-to-ground (Y capacitors) connections. This includes motors, inverters, electronic ballasts, solid-state relay snubbers, and spark quenchers. Interference that is symmetrical, balanced, or differential can be successfully absorbed by X capacitors. To counteract asymmetrical, unbalanced, or common-mode interference, Y capacitors are linked in a line bypass between the line phase and a point of zero potential.The low cost of polyester and the relatively compact dimensions are the main reasons for the high prevalence of PET film capacitors in modern designs.

Feature mylar VS polyester film capacitor:

1.Non-inductive construction
2.Metallized polyester film, winding structure
3.Small volume, light weight, excellent self-healing performance
4.Polyester tape with epoxy resin filling at both ends

Specifications:

Dielectric: Polyester film

Electrodes: Vacuum evaporated metal

Coating: Out wrapped with Mylar tape and ends sealed with epoxy resin

Leads: Axial leads of tinned wire

Reference standard: IEC 384-2 grade 1; SJ/T 10873-1996

Climatic catalogue: 40/85/21 (From 85 up to 105°C with derating voltage 1.25%/°C)

Endurance:

1,000 hours with 150% of rated voltage at 85°C

After the test: ∆C/C ≤8%, ∆DF≤0.30%(C>1 uF);

∆DF≤0.50%(C≤1 uF);

IR ≥0.5% of the specified value (20°C, 1kHz)