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EETXB2D122D Datasheet(PDF) 6 Page - Panasonic Semiconductor |
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EETXB2D122D Datasheet(HTML) 6 Page - Panasonic Semiconductor |
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6 / 37 page  4 Mounting Considerations (continued) The vinyl sleeve of the capacitor can be damaged if solder passes through a lead hole for subsequently processed parts. Electrically isolate the extra terminal(s) on T type products from the anode terminal, cathode terminal, and other circuit paths. Clearance Requirements Case mounted pressure relief vents require sufficient clearance to operate properly. The minimum clearance is diameter dependent as follows: 20~ 35mm diameters, 3mm minimum. 40mm diameters or greater, 5mm minimum. Circuit Board Cleaning Aluminum electrolytic capacitors can withstand immersion or ultrasonic cleaning with "safe" cleaning solvents for up to 5 minutes and 60°C maximum temperatures. Most aqueous based cleaning solvents and detergents are acceptable. Some solvent groups could damage capacitors as follows: Halogenated cleaning solvents may permeate the capacitor seal, causing internal corrosion and failure. Alkali solvents may attack and dissolve the aluminum case. Petroleum based solvents may deteriorate the rubber seal. Xylene may deteriorate the rubber seal. Acetone may remove vinyl sleeve ink printing. A thorough rinsing and drying process will prevent entrapment of residual solvents between the capacitor and the circuit board. Excessive drying temperatures and / or radiant heat drying sources may result in splitting or excessive shrinkage of the vinyl sleeve. Mounting Adhesives and Coating Agents When using mounting adhesives or coating agents, avoid materials with halogenated cleaning solvents including chloroprene based polymers. A thorough drying process after application is required to prevent solvent entrapment between the capacitor and the circuit board. Mounting adhesives or reinforcement clamps are recommended on 2 terminal, TS types with case sizes of φ 35 x 45mm or larger. Additional mounting support is also recommended for 4 or 5 terminal, T types with lengths exceeding 63mm. 5 Storage Leakage current will increase with long storage times. Storage times in ambient temperatures of 40°C or less can be four years or more before leakage current should be checked for conformance to the specified limit. Longer storage times may require reforming of the capacitor to reduce leakage current below the specified limit. This can be accomplished by applying rated voltage in series with a 1000 Ω resistor for a time period of 30 ~ 60 minutes. Under normal conditions, shelf life can exceed 10 years, providing that leakage current is checked before use. Long term storage in high humidity conditions could cause oxidation of the terminal plating which could adversely affect solderability. 6 Safety Precautions If the pressure relief vent of the capacitor should operate, immediately turn off the equipment and disconnect from the power source. This will minimize additional damage caused by the vaporizing electrolyte. Avoid contact with the escaping electrolyte which can exceed 100°C temperatures. If electrolyte or vapors enter the eye, immediately flush the eye with large amounts of water and seek medical attention. If electrolytes or vapors are ingested by mouth, gargle with water. If electrolyte contacts the skin, wash with soap and water. 6 Aluminum Electrolytic Capacitors |
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