Datasheet

Engineering Draft
Guideline-ALTS-S1-2
Application Guidelines
Guidelines - 3
P a n a s o n i c C o r p o r a t i o n
Design, Specifications are subject to change without notice. Contact your nearest Panasonic sales office for the latest specifications prior
to purchase and/or use. Whenever any doubt about safety comes up with this product please contact us immediately for engineering
assistance without fail. Specifications are typical and may not apply to all applications.
1.7. Capacitor Sleeve
The vinyl sleeve or laminate coating is intended for marking and identification purposes and is not meant to electrically insulate the
capacitor.
The sleeve may split or crack if immersed into solvents such as toluene or xylene and then subsequently exposed to high temperatures.
2.0 Capacitor Handling Techniques
2.1. Considerations Before Using
(1) Capacitors have a finite life. Do not reuse or recycle capacitors from used equipment.
(2) Transient recovery voltage may be generated in the capacitor due to dielectric absorption.
If required, this voltage can be discharged with a resistor with a value of about 1kΩ.
(3) Capacitors stored for a long period of time may exhibit an increase in leakage current.
This can be corrected by gradually applying rated voltage in series with a resistor of approximately 1kΩ.
(4) If capacitors are dropped, they can be damaged mechanically or electrically. Avoid using dropped capacitors.
(5) Dented or crushed capacitors should not be used. The seal integrity can be damaged and loss of electrolyte/shortened life can
result.
2.2. Capacitor Insertion
(1) Verify the correct capacitance and rated voltage of the capacitor.
(2) Verify the correct polarity of the capacitor before insertion.
(3) Verify the correct hole spacing before insertion (land pattern size on chip type) to avoid stress on the terminals.
(4) Ensure that the lead clinching operation done by auto insertion equipments does not stress the capacitor leads where they enter
the seal of the capacitor.
For chip type capacitors, excessive mounting pressure can cause high leakage current, short circuit, or disconnection.
2.3. Manual Soldering
(1) Apply soldering conditions (temperature and time) based on the specification, or do not exceed temperature of 390 ˚C for 3
seconds or less
(2) If lead wires must be modified to meet terminal board hole spacing, avoid stress on the lead wire where it enters the capacitor
seal.
(3) If a soldered capacitor must be removed and reinserted, avoid excessive stress on the capacitor leads.
(4) Avoid physical contacts between the tip of the soldering iron and capacitors to prevent melting of the vinyl sleeve.
2.4. Flow Soldering
(1) Do not immerse the capacitor body into the solder bath as excessive internal pressure could result.
(2) Apply proper soldering conditions (temperature, time, etc.). Do not exceed the specified limits.
(3) Do not allow other parts or components to touch the capacitor during soldering.
2.5. Other Soldering Considerations
Rapid temperature rise during the preheat operation and resin bonding operation can cause cracking of the capacitor's vinyl sleeve.
For heat curing, do not exceed 150 ˚C for the maximum time of 2 minutes.
2.6. Capacitor Handling after Soldering
(1) Avoid moving the capacitor after soldering to prevent excessive stress on the lead wires where they enter the seal.
(2) Do not use the capacitor as a handle when moving the circuit board assembly.
(3) Avoid striking the capacitor after assembly to prevent failure due to excessive shock.
2.7. Circuit Board Cleaning
(1) Circuit boards can be immersed using suitable cleaning solvents for up to 5 minutes and up to 60 ˚C maximum temperatures. The
boards should be thoroughly rinsed and dried.
The use of ozone depleting cleaning agents is not recommended for the purpose of protecting our environment.
(2) Avoid using the following solvent groups unless specifically allowed in the specification;
 Halogenated cleaning solvents : except for solvent resistant capacitor types, halogenated solvents can permeate the seal and
cause internal capacitor corrosion and failure.
For solvent resistant capacitors, carefully follow the temperature and time requirements
based on the specification. 1-1-1 trichloroethane should never be used on any aluminum
electrolytic capacitor.
 ·Alkaline solvents : could react and dissolve the aluminum case.
 ·Petroleum based solvents : deterioration of the rubber seal could result.
 ·Xylene : deterioration of the rubber seal could result.
 ·Acetone : deterioration of the rubber seal could result.
(3) A thorough drying after cleaning is required to remove residual cleaning solvents that may be trapped between the capacitor and
the circuit board. Avoid drying temperatures, which exceed the Upper category temperature of the capacitor.
(4) Monitor the contamination levels of the cleaning solvents during use in terms of electrical conductivity, pH, specific gravity, or
water content.
Chlorine levels can rise with contamination and adversely affect the performance of the capacitor.
(5) Depending on the cleaning method, the marking on a capacitor may be erased or blurred.
Please consult us if you are not certain about acceptable cleaning solvents or cleaning methods.