Mylar® film capacitors are used in a wide range of applications where their smaller physical size than other filmic material capacitors makes them ideal for miniaturisation of devices such as mobile phones etc. Mylar® film can be readily metallised or can be combined with layers of aluminium foil to produce wound and stacked capacitors as well as SMD capacitors. The ability of metallised Mylar® film to 'self heal' should there be any localized breakdowns gives an advantage for higher voltage applications. DuPont Teijin Films produces a wide range of Mylar® films tailored to individual capacitor types to ensure the maximum performance in use.
In situations where a higher service temperature is required Teonex® Q71 and Teonex®Q72 films are often used. Typical applications are in lead free soldered SMD capacitors and automotive lighting.
TEONEX® HV - The new High Temperature Dielectric for Power Capacitors
DuPont Teijin Films has developed Teonex® HV film which provides a dielectric with a high service temperature and highest energy density compared to all current materials. In addition when metallised it has excellent self healing properties. Potential Teonex® HV applications are high temperature power applications such as DC link in EV/HEV automotive and avionics, industrial energy conversion and renewable energy.