NOTES TO USER OF ALUMINUM ELECTROLYTIC CAPACITORS.

Aluminum electrolytic capacitors may cause explosion fire, or other serious hazards if used outside the specified operating conditions. Please familiarize yourself with the instructions below before using these capacitors.

Item

Instructions

Operating temperature, ripple current

L

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 failures.

3.

A capacitor also generates self-heating. 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 permissible ripple current declines with the rise in ambient temperature (the temperature of the capacitor's surroundings). Consider the permissible 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 the self-heating and short lifetime at both low and high frequency when equivalent series resistance and inductance change.

Applied voltage and other operating conditions

1.

In general capacitors have polarity. Applying reverse voltage or AC voltage to a capacitor may activate the vent or cause a short circuit, fire or other major failures. 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 failures.

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 beyond its service life risks such failures as safety vent activation or short circuit Replace as necessary at regular inspection.

B.

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 repeated!^

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.

10.

General-purpose capacitors should not be used for a circuit involving rapid charge and discharge or an A.C. circuit Capacitors specially made for such applications should be used.

Check the $elf heating of the capacitor used in such a circuit in addition to the types and levels to be imposed to the capacitor of the rapid charge/discharge, rush current and voltage.

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 major 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).

Installation

1.

Do not install wiring ora circuit pattern near the vent. When the vent is activated, the electrolyte may spurt out resulting in a short circuit followed by fire or another secondary hazard due to tracking or migration.

2.

Do not layout 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 an equipment check temperature distribution first.

 

Item

Instructions

Installation

3.

Do not hinder the activation of the vent. Allow for the following clearance above the vent If dissipation of gas is inhibited while the vent is in operation, the inner pressure will rise, with the danger of explosion, fire or other major failures.

 

Capacitor diameter

Clearance

 

(plS~ 35(36)

3mm ar more

cp40 or more

5mm or more

 

 

 

On-board self-supporting (snap mount type) capacitors

L

Do not connect the blank terminal (reinforced terminal) of multi-terminal (3-, 4・)snap mount capacitors, as this could cause a short circuit.

2.

Use a completely isolated circuit between the case and the electrode terminal, and between the case and the circuit pattern.

3.

Exterior sleeves are for labeling purposes, not for insulation. Consult us if you need insulation.

4.

Failure to tightly solder the capacitor to the PCB may result in one of its terminals breaking or its pattern peeling off due to vibration. Insert the capacitor snugly and correctly into the designated holes in the PCB, then solder it.

5.

Terminal pitch and dimensions for the terminals are specified for a capacitor. Check whether the terminal pitch and the mounting holes on the board match property. The electrolyte leaks from inside if mismatched.

6.

If it becomes necessary ta process a lead wire terminal due to mismatching of the space between the terminals to the holes in the PCB, be sure to melt the solder thoroughly so the capacitor isn't subjected to stress.

7.

Flux on the rubber seal may result in corrosion. Do not let flux stick to any part other than the terminals.

8.

Solder at 260°C for not more than 10 seconds or at 350°C for not more than 3 seconds. Exceeding these specifications may result in a decline in electrical performance, leading to trouble. Do not let the tip of the soldering iron come in contact with the capacitor body.

9.

If it becomes necessary to remove a capacitor after soldering, melt the solder with a soldering iron to avoid subjecting the terminals to stress.

10.

For cleaning flux, we recommend an aqueous or higher alcohol detergent or isopropyl alcohol. The recommended concentration of flux with regard to the cleaning agent is 2wt% or less. Excessively high flux concentration may cause corrosion due to halide. For use of other cleaning agents, consult us.

11.

If you must clean the capacitor with halogen solvents, etc., we recommend that you use washable capacitors. Make sure that the cleaning conditions are within those stipulated in the specifications, and measure the cleaning agent for conductivity pH, specific gravity and moisture content for contamination control. After cleaning, thoroughly dry the capacitors together with PCBs. Do not stone the capacitors in the same atmosphere as the cleaning agent or in a sealed container. For details on washable capacitors, consult us.

12.

Some cutting oils contribute to swelling of rubber; with the risk of corrosion and a decline in air-tightness. If the rubber surface will be exposed to cutting oils, use washable capacitors as in 10 above.

13.

Thoroughly remove all traces of the cleaning agent from the capacitor Even when not cleaning the flux, dry the flux itself. Cleaning agent or flux residue may cause the halide to penetrate the rubber seal, leading to corrosion.

14.

When fixing a PCB and capacitor with a coating agent or fixative, use a substance completely free of halide compounds. Thoroughly dry the flux or detergent before applying the coating. Do not let the coating block the entire surface of the seal. Any halide compound present in the coating may lead to corrosion.

15.

When installing the vent of the capacitor against the PCB, drill a gas bleeder hole to allow the gas to escape when the vent is activated. If the diffusion of a gas is hindered while the vent is in operation, the internal pressure can rise, with the danger of explosion, fire or other serious failures.

16-

Do not twist or otherwise physically move the capacitor after soldering it to the PCB. Do not take hold of the capacitor to move a PCB either; as this may deform the terminal or decrease its airtightness.

17.

Do not apply physical impact to the capacitor (striking^ etc) after it is soldered to a PCB. When stacking PCBs, make sure that the capacitors don't contact PCBs or other components.

18.

Do not solder a capacitor by dipping in a solder bath. Solder only on the terminal side of the capacitor; via a PCB.

 

Item

Instructions

 

i.

When the capacitor must be installed on its side, the anode terminal side must face upward. If the anode terminal is located below the cathode terminal, intermal corrosion may occur during long-time use.

Screw-terminal type capacitors

2.

The vent(cap face)should not face downward. Electrolytic solution and compounds(element fixing agent$)could leak from the valve.

3.

Recommended tightening torque and terminal permissible current(maximum current a terminal can withstand)for each terminal screw are listed below. Consult us if you wish to use a capacitor on a machine that vibrates significantly.

 

Terminal

Recommended torque (Permissible level) [N-m]

Terminal permissible current [ A ]

 

M5

2.2 (1.5-3.0)

60

M6

3.5(3.0-4.0)

100

M8

7.5 (7.0-8.0)

120

 

 

 

4.

The terminal screws (M5 standard underhead: 10mm, M6 standard underhead: 12mm) in the separate package are designed for wire thickness not exceeding 2mm. Add to the screw length for wires more than 2mm thick. Heat generated due to a small screw clamping area could cause a failure.

5.

If a screw is loose or angled, that portion generates heat, with a danger of fire or other serious failures. Check that the screw is inserted on the perpendicular and securely tightened.

6・

We recommend a bar hole diameter of 6mm for M5 terminals. An excessively large hole diameter may result in poor contact between the terminal surface and the bar; causing local heat buildup, with a danger of fire or other serious failures.

7.

Do not apply physical $tress(tightening with fixtures, etc.) to the curled portion(seal contacting the case and cap). Any such practice may cause a liquid leak or sleeve breakage.

Operating environment

1.

Water; saltwater; oil or other electrically conductive liquid on a capacitor; or using a capacitor when it is damp with dew may cause a failure. Oil on the rubber seal or safety vent may cause a decline in airtightness. Do not use any capacitor in contact with the liquid. Do not use capacitors that have been immersed in rainwater or other contaminated water

2.

Do not use or leave a capacitor in areas where there is halide compound gas such as hydrogen sulfide, nitrous acid, sutfurous acid, chlorine and bromine, or ammonia or other hazardous gas. The ingress of any of these gases into a capacitor may corrode rt

3.

Do not use or leave a capacitor in an area exposed to ozone, ultraviolet light, or radiation.

4,

Powders(dust etc) that settle between terminals can absorb moisture and cause corrosion and tracking of the terminal. When there is conspicuous dust between terminals, stop the current, allow the capacitor to discharge, and wipe the terminals with paper or a towel lightly dampened with water or ethanol. Do not use cleaning agents or other chemicals.

5.

Do not use a capacitor in an area subject to excessive vibration or impact

Storage

1.

Store all capacitors indoors at a temperature of 5-35'C and relative humidity of not more than 75%RH(25'Q, away from direct sunlight. The maximum shelf life of capacitors is 3 years. All capacitors which have been on the shelf for more than 3 years have an excessively high leakage current Treat them with appropriate voltage before use. Any capacitor stored for more than 5 years should be replaced.

The maximum shelf life of capacitors for photo flash use is 1 year and 2 years for snap mount capacitors using leadless soldered terminals, beyond which solderability deteriorates.

2.

Store capacitors under the same operating conditions as mentioned above, with the exception of temperature and humidity.

3.

Store capacitors in their original packaging whenever possible.

4.

Even after discharged, capacitors may hold an electrical charge due to re-striking.De not touch the terminals with bare hands. Touching the terminals could cause an electric shock. Discharge all capacitors with a resistor(approx. 1KΩ) ora discharge plate before use.

Test run

1.

Do not touch the terminals of a capacitor with bare hands. Touching the terminals could cause an electric shock.

2.

Do not short-circuit a capacitor between its terminals with an electrically conductive material.

3.

Do not apply any acid, alkaline, or other electrically conductive solution to a capacitor;

4.

Check tihe 'Operating Environment" for the operating conditions for capacitors.

 

Item

Instructions

Maintenance and servicing

L

Conduct periodic checkups on capacitors for industrial equipment following these checkpoints:

(1) Appearance: Condition of the vent(open notably swollen), liquid leaks or other considerable abnormality

(2) Electrical performance: Capacity; tangent of loss angle, leakage current, and other items specified in the delivery specifications. The standard temperature for measuring electrical performance is 20°C. Leave the capacitor at 2(TC and wait for the inside of the capacitor ta reach the specified temperature before taking measurements. Consult us on whether to use such a capacitor Before each periodic checkup, turn off the equipment and completely discharge the capacitor

2.

Replace all capacitors whose service life has reached its end. When replacing one capacitor; always replace all of them. Mixing old and new capacitors may cause an imbalance in the ripple current or voltage sharing, risking failures such as activation of the vent or short circuit

In an emergency

1.

If gas is detected while a product is in use, turn off the main power supply or unplug it

2.

When the safety vent of a capacitor is activated, a hot gas exceeding 100X will escape. D。not place your face in dose proximity to the vent and avoid proximity to areas exposed to the gas.

3.

Should the gas jet get in your eyes, wash them immediately with dean water. IF you inhale the gas, gargle immediately. The gas is composed of a gaseous form of hydrogen or organic solvents.

4.

Should the electrolyte come in contact with your skin, wash with soap and water Never put it into your mouth.

For scrapping

1.

Scrapped capacitors are classified as scrapped metal. For burial they are handled as controllable industrial waste because of the nature of the contents (electrolyte). Commission an industrial waste disposal specialist for their disposal Ensure that no waste products enter the market

2.

Most of the material is aluminum and cannot be completely burned. In incineration, take the following into consideration: 口 Burning the capacitors in an airtight state may cause an explosion. Before incinerating, either pierce the exterior or break them open.

Be sure to wear protective clothing during this operation, since electrolyte or gas will jet out if the inner pressure of the capacitor is high. 口 Because of the exterior material (polyvinyl chloride low-temperature incineration may emit hazardous gases. Burn the material at high temperatures (800T or above). Incineration requires the separation of the exterior materials.

3.

Do not attempt to crush the capacitors, as this may cause electric shock or injury

Miscellaneous

1.

For details, see the Guidelines on the Operation of Fixed Aluminum Electrolytic Capacitors for Electronic Equipment EIAJRCR-2367B March 2002 issue.

2.

lb preserve the global environment, we are expediting the substitution of chemical substances that negatively impact the environment We ask your cooperation in our initiative to reduce substances with environmental impact We also ask you to avoid using ozone-layer destroying substances to clean capacitors.

3・

To control insects during export fumigation may be done using halide compounds such as methyl bromide. Direct fumigation of capacitors or equipment incorporating capacitors or use of fumigated timber as a pallet may cause corrosion inside a capacitor; resulting in failure. Even when covered in plastic, chemicals may penetrate through small gaps. Likewise, do not apply insecticides directly on or near the capacitors.

4・

When using a sterilizer against SARS and other infectious diseases, do not spray it directly on or close to capacitors and equipment incorporating capacitors. Some sterilizers contain a high concentration of halide compounds. The sterilizer spray may accelerate internal corrosion, resulting in failure. Avoid using capacitors or equipment incorporating capacitors onto which a chemical has been sprayed. Instead, replace them with new ones.

5.

Consult us for further information.

 

 

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