When assembling: Do not use the capacitor that has been assembled and passed through the power pack. Except for the capacitor that is removed when the electrical performance is checked regularly, the capacitor cannot be re-used. The capacitor may generate a regenerative voltage. In this case, discharge it through a resistor of about 1KΩ. If the capacitor is stored under the condition that the room temperature exceeds 35 ° C and the humidity is 75% RH, the leakage current of the capacitor may increase. At this time, the aging treatment can be performed by a resistance of about 1 kΩ. Please confirm the rated capacity of the capacitor before installation. Check the polarity of the capacitor before installation. Do not use the capacitor that has fallen to the floor. Do not use the deformed capacitor during installation. Please confirm that the terminal spacing of the capacitor matches the hole spacing of the printed circuit board. For mounting, the lead type can be processed and molded. When a lead type or substrate self-supporting aluminium electrolytic capacitor is mounted on a printed circuit board, it should be pressed so as to be in close contact with the circuit board, and the product cannot be applied to the capacitor. The force above the mechanical strength specified in the catalog or the acknowledgment, the automatic assembly machine is in the adsorption, loading And have aligned position, or cutting terminals may cause an impact, be aware of its impact.
When soldering iron soldering: The welding conditions (temperature, time) product catalog or the scope specified in the acknowledgment, the terminal spacing does not correspond to the hole pitch of the printed circuit board. When processing the lead terminals, be careful not to apply pressure to the capacitor body. Do not allow the tip of the soldering iron to contact the capacitor body. After the solder is completely melted, remove the capacitor from the board and solder it with a soldering iron. Be careful not to apply pressure to the capacitor.
When performing wave soldering: Do not immerse the main body of the aluminium electrolytic capacitor into the molten solder, insert it into the printed circuit board as a barrier, and only weld the surface of the substrate on the reverse side of the capacitor side. The soldering conditions (preheating, soldering temperature, immersion time) are not available. Except for the range specified in the catalogue or the acknowledgment, solder must not be attached except for the lead terminals. When soldering, care should be taken to prevent other components from coming into contact with the capacitor.
When reflow soldering: The soldering conditions (preheating, soldering temperature, immersion time) must not exceed the range specified in the catalog or the approval document. When the infrared heater is used, the absorption rate of infrared rays will be different depending on the color and material of the capacitor. Please pay attention to the degree of heating, please do not perform reflow soldering twice. If you need to do it twice, please consult our company first, and when reflow soldering, please be careful not to touch other capacitors.
Note1: Do not use the mounted chip capacitor after it has been removed. Also, when installing a new capacitor on the printed circuit board, remove the solder left on the printed circuit board and press the required one. Conditions are to be welded, and please confirm whether reflow is suitable before welding.
Note2: On the circuit board after welding, improper external force is applied to the capacitor body or its leads, which will damage the internal structure of the capacitor, resulting in short circuit and high leakage current. Do not bend or twist the capacitor body after welding. It is recommended to refer to the following picture.
Post-welding treatment: Treatment after soldering of printed circuit board Note that the following mechanical stresses should not be applied: ① The capacitor body should not be tilted, grounded or twisted. ② Do not grasp the main body of the capacitor to carry the circuit board. ③ Do not allow other objects to collide with the capacitor. In addition, when the printed circuit board is placed in an overlapping manner, the printed circuit board or other parts are not allowed to hit the capacitor.④ and the printed circuit board on which the capacitor is mounted cannot be dropped.
Substrate cleaning: Capacitors can not be cleaned with the following cleaning agents: ① halogen-based solvent, capacitor failure due to corrosion, ② alkaline solvents, causing corrosion (dissolution) of aluminium shells,③ terpenes, petroleum solvents and xylene, leading to aging of sealing rubber, ④ acetone, leading to disappearance of labels,⑤ if necessary cleaning, please use Clean the guaranteed capacitors and keep them within the range specified in the catalogue and the acknowledgment. Please pay special attention to the ultrasonic cleaning conditions.
Capacitor cleaning: If it is necessary to clean the aluminium electrolytic capacitor, please confirm the following: ① Please carry out the pollution management of the cleaning agent: conductivity, PH, specific gravity, water content, etc. ② After cleaning, please do not store the capacitor in the cleaning solution or In the sealed container, please use hot air (below the working upper temperature) for more than ten minutes to fully dry to avoid the cleaning liquid remaining on the printed circuit board and electrolytic capacitor. ③ Generally, the aluminium electrolytic capacitor is easy to react with halogen ions. The reaction (especially chloride ion) varies depending on the electrolyte used and the encapsulating material. However, when a certain amount of halogen ions intrude into the interior, it may cause a corrosion reaction during use and cause leakage. The current is greatly increased, the heat is generated, the safety explosion-proof valve is abnormally opened, and the open circuit and other destructive failure phenomena.
Fixing agent, coating agent: Please do not use fixing agent and coating agent containing halogen-based solvent, etc., and when using fixing agent and coating agent on aluminium electrolytic capacitor, please confirm the following: ① Applying fixing agent and coating Dry the board before using the agent, and the sealing part should not be completely blocked. ② For the heat curing conditions of the fixing agent and the coating agent, please observe the provisions in the catalogue or the acknowledgment. ③ When the sealing part of the aluminium electrolytic capacitor is completely blocked by the resin, the inside of the capacitor If the internal pressure cannot be released, it will cause danger. In addition, when there are too many halogen ions in the fixative and the coating agent, the component will invade the inside of the capacitor through the sealing rubber, which may cause abnormality. Please consult our company for related matters.④ Some types of solvents used in fixatives and coatings may cause changes in the appearance of gloss or whitening of the surface of the casing.
Fumigation treatment: When importing and exporting electronic equipment, such as capacitors, because of the need to use wooden packaging, fumigation treatment is required, sometimes halogen compounds such as brominated methane are needed for treatment. At this time, if the aluminium electrolytic capacitor is exposed to methyl bromide. A halogen compound has a risk of causing a halogen ion to cause a corrosion reaction.
