metal halide lamp capacitors

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Case： Round aluminum oil-filled and sealed case.

AC film capacitors for general purpose applications (e.g. AC filters with harmonic frequencies exceeding 60 Hz), as well as for lighting.For the latter, AC capacitors are used in conjunction with asynchronous motors on single-phase mains supplies. They are designed for 50 or 60 Hz systems.

Applications：Mainly used for fishing lamp and metal halide lamp.

**Specifications**
Standard temperature	-25℃ ~ +85℃
Voltages Ratings	250V - 500V AC
Capacitance Range	1-120 uF
Applicable Standard	IEC60252-1:2011,GB/T3667.1-2005.UL810、EN60252-1：2011

Q: Is the capacitor attached to the carbon foil positive?: Electrolytic capacitors of the positive plate with aluminum foil, immersed in the electrolyte for anodic oxidation treatment, aluminum foil surface will produce a layer of aluminum oxide film, the thickness is generally 0.02 - 0.03μm. This layer of oxide film is positive and negative insulation between the plates.

Q: Low voltage capacitor voltage 0.45 and 0.4 What is the difference between usage: 0.45 and 0.4 capacitors are capacitors that rated the line voltage of 0.45kV and 0.4kV; they are suitable for 380V voltage systems, the difference lies in their pressure rating;

Q: Use capacitance to do transformer how to calculate: The principle of capacitor buck is not complicated. His working principle is to use the capacitor at a certain AC signal frequency to produce capacitive reactance to limit the maximum operating current. For example, in the 50Hz frequency conditions, a 1uF capacitance generated by the capacitive reactance of about 3180 ohms. When 220V AC voltage is applied to both ends of the capacitor, the maximum current flowing through the capacitor is about 70mA.

Q: What is the relationship between capacitance and voltage?: when you charge 5v, want to be in the first The capacitor is full, the second capacitor half; if you charge a higher voltage 6v, then the first capacitor to diffuse out, the actual performance of the capacitor was breakdown!

Q: Does anyone know the difference between the stray inductance of the capacitor and the parasitic inductance?: This impedance can not be ignored in the presence of high frequency current, with particular note that the bypass capacitor needs to pass through the two vias when connecting the power plane and the formation so that the parasitic inductance of the vias is multiplied.

Q: How to identify high voltage capacitors is good or bad: You have no voltage regulator, if there is, with a voltage regulator, an ammeter a voltmeter (available multimeter instead) to the capacitor plus an integer current (controlled by a voltage regulator), and then calculate the capacitance based on the voltage reading and current reading Impedance, and then divided by 3184 calculated by the tolerance value, the results and the capacitor nameplate on the standard almost no capacitance, and the other side of the capacitor is broken

Q: What is the electrolytic capacitor inside?: There are aluminum foil, paper (not the general paper), as well as electrolyte. There is polarity, then the explosion will explode.

Q: How does the capacitor work? What does it do?: The bypass capacitor is an energy storage device that provides energy to the local device, which can equalize the output of the regulator and reduce the load demand. Like a small rechargeable battery, the bypass capacitor can be charged and discharged to the device. To minimize the impedance, the bypass capacitor should be as close as possible to the load device's power supply pin and ground pin.

Q: Why does the circuit current gradually decrease when charging the capacitor?: For the ideal capacitor, when the capacitor is charged, as the voltage across the capacitor gradually increases, the charging current will gradually decrease until zero.

Q: What is the difference between polyester film capacitors and ceramic capacitors?: Different components of the ceramic, its dielectric constant and temperature coefficient is different, the temperature coefficient range is wide, easy to make different temperature coefficient of the capacitor, used as a temperature compensation capacitor.

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