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For sale here we have the above…
Very high CV value
Standard snap-in pin style
The CLP is a snap-in electrolytic capacitor featuring the very highest
volumetric efficiency ever offered by Dubilier.
The product is suitable for all applications requiring high CV values.
Lifetime: 2000 hour long-life grade
Operating Temperature Range: -40°C to +85°C
Body Diameter: 22.4mm
Lead Pitch: 10mm
Terminal Type: Snap-In
For datasheet search…Dubilier CLP series
Or go directly to…
Please note! Due to their age it may be necessary to ‘reform’ these capacitors, for information on this process search…Reforming Electrolytic Capacitors
Manufacturers claim that most old electrolytics can be saved if the correct procedure is followed, regardless of how long they have been unused. Such capacitors must be “reformed”. This process consists of applying rated voltage through a resistance (about 30,000 ohms, five watt) for five minutes plus one minute for each month of storage (see figure 6). As the capacitor reforms, the voltage across the resistor will drop (measured at the Xs in Figure 6). If that voltage will not drop below 10% of applied voltage after one hour, the capacitor is probably beyond help.
Reforming Electrolytic Capacitors
The process of reforming an old aluminium electrolytic capacitor consists of the application of rated voltage, through a resistor, for a period equal to five minutes plus one minute per month of storage.
The electrolytics appearing on the surplus market have often been in storage for a very long period indeed. Some manufacturers use a visible code, of which the first two digits indicate the year of manufacture.
The circuit shown in the sketch above works reasonably well. Apply the rated voltage through a 5W resistor. Anything from 20K-50K will do, as this is far from a precision process. The meter is used to measure the voltage drop across the resistor; when no current is flowing, there will be no drop. Obviously, when there is a large voltage drop (more than 20% of the applied voltage), there must be a significant current flow through the capacitor. The nature of a proper capacitor is to impede DC current flow, so when there is such flow, something must be wrong.
Note: Apply the appropriate D.C. voltage to the capacitor with a D.C. power supply. An old Kepco, Lamba etc. tube regulated lab power supply rig works great. Be sure to observe the proper polarity!
These capacitors came to us as part of a lot of surplus stock from a large distribution Co. and have been kept in storage for some time, we have therefore classified them as ‘new other’. They are however in good serviceable condition though they may require reforming, see above. The photographs are representative of their general appearance being of some of our actual stock, and, as with all our products they come with a full guarantee.
If you have similar items to this, or indeed any electronic components that are surplus to requirements please contact us with details.