00150018| Datasheet

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Aluminum Electrolytic Capacitors Product and Personal Safety Product and personal safety
Product safety Parameter Safety information Reference (Chapter "General technical information") Para. 1 "Basic construction of aluminum electrolytic capacitors"

Polarity

Make sure that polar capacitors are connected with the right polarity. If the opposite polarity were to be applied, this would cause an electrolytic process resulting in the formation of a dielectric layer on the cathode foil. In this case strong internal heat generation and gas emission may occur and destroy the capacitor. Polar capacitors do not tolerate a voltage reversal. Incorrect polarities of up to 1,5 V are, however, permissible for short periods of time as the formation of a damaging oxide layer on the cathode only starts at voltages of this magnitude.

Reverse voltage

Aluminum electrolytic capacitors are polar capacitors. Para. 3.1.6 Where necessary, voltages of opposite polarity should be "Reverse voltage" prevented by connecting a diode. The diode's conductingstate voltage of approximately 0,8 V is permissible. Reverse voltages 1,5 V are tolerable for a duration of less than 1 second, but not in continuous or repetitive operation. The minimum breakdown strength of the insulating sleeve is 2 500 VAC or 3 500 VDC. A test method for verifying the breakdown strength of the sleeves is described in IEC 60384-4. Para. 3.8 "Breakdown strength and insulation In order to ensure full breakdown strength, care must be resistance of insulating taken not to damage the insulating sleeve, especially when sleeves" ring clips are used for mounting. The insulation can be improved by using an insulating strip. Chapter In such cases, attention must be paid to any relevant regu- "Accessories" lations (e.g. VDE, BSA or UL regulations).

Breakdown strength of insulating sleeves

Upper category temperature (UCT)

The upper category temperature is the maximum permissible ambient temperature at which a capacitor may be continuously operated. If this limit is exceeded the capacitor may fail prematurely.

Para. 6.1 "Maximum permissible operating For some type series, however, operation at temperatures temperature" above the UCT is permissible for short periods of time. Details are given in the individual data sheets. The following maximum tightening torques may not be Para. 9.2 exceeded when connecting screw terminals: "Mounting M5: 2 Nm torques" M6: 2,5 Nm

Robustness of terminals

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