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        Radial type Aluminum electrolytic capacitor

        Writer:sunny yangSource:capsun Number of visits: Date:2012-12-12 09:53

        NOTES TO USERS OF ALUMINUM ELECTROLYTIC CAPACITORS
        Aluminum electrolytic capacitors ('capacitors') may cause explosion, fire, or other serious hazard if used outside the specified operating conditions. Please familiarize yourself with the instructions below before using these capacitors
        A,Operating temperature,ripple current
        1,Check the operating and installation environment and use the capacitor within the range of the rated performance specified in the catalog or specifications.
        2,Maintain operating temperature and ripple current within the specified ranges. Base your choice of capacitors on the maximum load conditions. A capacitor will overheat under excessive current, potentially resulting in short circuit, fire, or other major failure.
        3,A capacitor also generates its own heat. Please bear in mind that the capacitor heats up the interior of the equipment, and take appropriate precautions. Operate the unit under normal conditions and check the temperature of the area surrounding the capacitor.
        4,The allowable ripple current declines with the rise in ambient temperature (the temperature of the capacitor's surroundings).Consider the allowable ripple current at the maximum predictable ambient temperature.
        5,Electric characteristics change as frequencies change. Check frequency changes in order to choose the right capacitor. Special attention needs to be given to low frequencies, when equivalent series resistance rises, generating greater heat
        B, Applied voltage and other operating conditions
        1,In general, capacitors have polarity. Applying reverse voltage or AC voltage to a capacitor may activate the safety vent or cause a short circuit, fire or other major failure. Use a special AC capacitor for AC voltage
        2,Use a bipolar capacitor for circuits whose polarity reverses. However, as in any other case, do not use a bipolar capacitor in an AC circuit
        3,Do not apply voltage in excess of the rated voltage. When an AC voltage is superimposed on DC voltage, prevent the peak value from exceeding the rated voltage. Excessive voltage may cause a short circuit, fire, or other major failure.
        4,Specifications on surge voltage have restricted conditions and therefore do not guarantee long hours of operation. Voltage should never exceed the rated voltage of the capacitor, even for brief periods. Choose your capacitor accordingly
        5,When connecting more than one capacitor in parallel, give proper consideration to the resistance of the wiring. Establish the connections so that the wiring resistance will be equal at every capacitor
        6,When connecting more than one capacitor in series, all must be of identical rating, then the balancing resistors connected in parallel. At that time, design the circuit so that equal voltage levels are applied to all the capacitors. Ascertain that the voltage applied to each individual capacitor does not exceed its rated voltage.
        7,Take into account the service life of the equipment in the use of the capacitor. Use of the capacitor beyond its service life risks such failures as safety vent activation or short circuit. Replace as necessary at regular inspection
        8,Do not use a capacitor for a circuit that is quickly charged and discharged repeatedly. Use a dedicated capacitor for an application like a welding unit or photo flash charging/discharging. Consult us for selecting the proper capacitor, since the control circuits of certain rotation equipment, like servo motors, charge and discharge repeatedly
        9,Even slow charging/discharging can shorten the service life of a capacitor, resulting in premature failure, where there are marked changes in voltage changes. Check the installation in your equipment carefully and consult us
        C, Before installation
        1,Check the specifications of the capacitors, and install them within the prescribed specifications.
        2,Do not reverse the polarity. Do not use a capacitor where reverse voltage is applied, even if it appears problem-free. Not taking these precautions could lead to a major failure
        3,Dropping or otherwise impacting a capacitor may result in a decline in its electric performance, causing a failure. Do not use any capacitor whose packaging has a noticeable abnormality on delivery
        4,Do not distort the shape of the capacitor, which may lead to serious failures such as liquid leakage or short circuit
        5,Do not reuse a capacitor that has previously been installed on a machine and energized. No capacitor can be reused (with the exception of removal for measuring electrical performance during periodic checkups).
        D, Installation
        1,Do not install wiring or a circuit pattern near the safety vent. When the safety vent is activated, electrolyte may spurt out,resulting in short circuit followed by fire or other secondary hazard due to tracking or migration.
        2,Do not lay out heat-generating components near the capacitor. Radiated heat and other partially high temperatures may shorten the life of the capacitor. PCB temperature that is higher than the internal temperature of the capacitor markedly hinders the dissipation of heat inside the capacitor, greatly shortening its life. When designing equipment, check temperature distribution first.
        3,Do not hinder the activation of the safety vent. Allow for the following clearance above the safety vent. If dissipation of gas is
        inhibited while the pressure valve is in operation, the inner pressure will rise, with danger of explosion, fire or other major failure

        Capacitor diameter

        Clearance

        18-35mm dia

        3mm or more

        40mm dia or more

        5mm or more

        TypeInfo: Industry information

        Keywords for the information:Aluminum Electrolytic Capacitors  Electrolytic Capacitors  Capacitors  DC  circuit 

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