Suntan Blog

For all capacitor technologies that do not have the ability to recover after a partial breakdown, the current flow is continuous.

However metallized film capacitors have the property to recover after an instantaneous breakdown (partial breakdown) due to the fact that the metallized electrodes (capacitor plates) act as a fuse. For fusing a small current is needed, but is not continuous. This effect is defined as “self healing” and not as breakdown.

Therefore in testing these capacitors on a proof voltage, it is always possible that the capacitors have the self healing effect, taking temporarily a peak current, but are completely isolated again after this phenomenon is stopped. To take this in account for qualifying capacitors, in all IEC standards of metallized film capacitors a breakdown is defined only when it is “permanent”.

Therefore a note is added for explanation.

Requirement: There shall be no permanent breakdown or flashover during the test.

Note: The occurrence of self-healing breakdowns during the application of the test voltages is allowed.

To detect if the behavior is a self healing or permanent breakdown, it is recommended to measure the remaining charging current only after one minute of charging and to neglect the small current peaks (arcing) before that time. Modern “high pot” test equipments have the function to allow arcing currents before the final permanent breakdown current.

This type of capacitor is a essentially a form of polyester film capacitor where the polyester films themselves are metallised. The advantage of using this process is that because their electrodes are thin, the overall capacitor can be contained within a relatively small package. The metallised polyester film capacitors are generally only available as leaded electronics components.

Suntan is a Hong Kong based manufacturer of Plastic Film Capacitors, Its Metallised Polyester Film Capacitor is NON-INDUCTIVE, EXTENDED FOIL, DIP COATED, HIGH MOISTURE RESISTANCE, Such as their TS02 .TS02 has three features:

1.High reliable with its Self-Healing performance.

2.Coated with epoxy resin for superior heat resistance, humidity resistance and solvent resistance.

3.Good reputation in use with filtering, DC blocking coupling and general communication equipment.

In Suntan’s website: www.suntan.com.hk there is all TS series Capacitors. Detailed Features & Specifications & PDF will give you a new knowledge of Electrical Capacitors.

The polypropylene is sometimes used when a higher tolerance is necessary than polyester capacitors offer. As the name implies, this capacitor uses a polypropylene film for the dielectric. One of the advantages of the capacitor is that there is very little change of capacitance with time and voltage applied. They are also used for low frequencies, with 100 kHz or so being the upper limit. They are generally only available as leaded electronics components.

Such as our polypropylene film capacitors , it has three features:

1. Comparatively small size saves space of print circuit board.

2. Temperature dependence indicates characteristic of negative.

3. Dissipation Factor is normally low and temperature dependence of capacitance is linear.

This type of capacitor is a essentially a form of Polyester Film Capacitor where the Polyester Films themselves are Metallized. The advantage of using this process is that because their electrodes are thin, the overall capacitor can be contained within a relatively small package. The Metallized Polyester Film Capacitors are generally only available as leaded electronics components.

Suntan is a Hong Kong based manufacturer of Plastic Film Capacitors, including Green Polyester Film Capacitor, Metallized Polyester Film Capacitor, Mini BOX Metallized Film Capacitor, X2 Capacitor, Metallized Polyester Film Capacitor and Polystyrene Film Capacitor etc.

Suntan was founded as professional manufacture of Plastic Film Capacitors. The features of film capacitor are non-inductive construction, self-healing, high reliable and superior performance in high frequency applications. It is applied to filter and noise suppression circuit, pulse logic and timing circuit, DC blocking, by-passing and signal coupling in general communication equipment. The construction of film capacitor includes polyester film dielectric with vacuum-evaporated metal electrodes, radial leads of tinned wire are electrically welded to the contact metal layer on the ends of capacitor winding, epoxy resin coating. Are you interested in learning more details about Film Capacitors? Please go to visit www.suntan.com.hk for more informations.

Suntan offers Plastic Film Capacitors which are the key components of power supply units. Plastic Film Capacitors help suppress interference and simultaneously decouple semiconductors or are used as DC link capacitors. Suntan Plastic Film covers a wide range of capacitance and voltage, matching a various applications such as HID lamp, photo flash, engine control unit and LCD backlight. All products are environmentaly conscious and comply with RoHs directive.

A capacitor constructed by stacking, or forming into a roll, alternate layers of foil and a dielectric which consists of a plastic, such as polystyrene or Mylar, either alone or as a laminate with paper.Plastic film capacitors help suppress interference and simultaneously decouple semiconductors or are used as DC link capacitors.

Suntan have 4 types of Axial Film Capacitors, they are differ with different material and different body style.

Suntan have Metallized Polyester Film Capacitor with Cycloidal & Oval body style and Metallized Polypropylene Film Capacitor with Cycloidal & Oval body style also.

The temperature  can up to 105'C at most.

They are mainly used in different instruments, DC & AC circuit of the household equipment and the fractional frequency circuit of acoustics system.

In these devices, polystyrene film is used as the dielectric. This type of capacitor is not for use in high frequency circuits, because they are constructed like a coil inside. They are used well in filter circuits or timing circuits which run at several hundred KHz or less.

The component shown on the left has a red color due to the copper leaf used for the electrode. The silver color is due to the use of aluminum foil as the electrode.

• The device on the left has a height of 10 mm, is 5 mm thick, and is rated 100pF.
• The device in the middle has a height of 10 mm, 5.7 mm thickness, and is rated 1000pF.
• The device on the right has a height of 24 mm, is 10 mm thick, and is rated 10000pF.
• These devices have no polarity.