DME4S33K-F

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Film capacitors are widely used in both industrial and personal electronic devices due to their high capacitance and long-term stability. The DME4S33K-F is an example of a famous type of film capacitor. Its application field is in low frequency AC power supplies, as well as DC bridging and AC line protection circuits.

In terms of operation and construction, this type of film capacitor consists of two metalized polyester foils that are separated by an insulating layer of nylon. The metalized layers are aluminum and are coated with a thin dielectric film of polyethylene terephthalate to form the capacitor plates. These plates are also embedded with an intermediate film of tantalum pentoxide, which provides impurity removal and temperature compensation for charge leakage.

The DME4S33K-F capacitor has a dielectric constant, or capacitance, that ranges from 4pF to 33kF, depending on the application field. Its voltage range spans from 10V to 10kV, and the max current is 5A. This capacitor also has a low ESR (equivalent series resistance) which is beneficial since it reduces power losses. The most important feature of this type of capacitor is its long-term stability, with a maximum capacitance change of 0.1% per decade of operating hours.

The working principle of any capacitor is based on the storage of electric charge. Thus, when alternating current flows across a capacitor plates, electrons will accumulate charge on the plates. The electric field between the plates will eventually reach the breakdown voltage, producing a spark that can damage the capacitor. This is why it is important to ensure that the voltage rating of the device is not exceeded.

The DME4S33K-F film capacitor is a reliable and cost-effective solution for applications where a high capacitance, long term stability, and a low ESR are needed. It is commonly used in AC power supplies and DC protection circuits, and is ideal for applications where space is a consideration.

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