Nippon Chemi-Con Electrolytic Capacitor 2200uF 10V 85’C 10 Pieces OL0089E | Rich Electronics
Description
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For sale here we have the above…
Nippon Chemi-Con CE Series
Axial Electrolytic Capacitor
10v 2200uF
10 pieces
(SL)85’C
SIZE: 16 MM DIAMETER X 31 MM LONG
Axial 35MM PIN LENGTH
Please note! a recent purchaser of these contacted us with the following….
“Hi, I thought you might like to like to point out to future purchasers that these caps have some staining to the area where the pins are attached to the casing, this worried me at first, but I did a little research, apparently this can sometimes occur during the manufacturing process. This would appear to be correct, as they are now installed and work fine, many thanks.”
These came to us as part of a lot of surplus stock from a large ‘Milspec’ type Co. having been in storage for many years we have classified them as ‘new other’. Despite being ‘old new stock’ these quality Nippon Chemicon caps. are still perfectly serviceable though they may need reforming… the procedures described below are given to aid the engineer but please be aware these are electrolytic capacitors and by their very nature require a high degree of skill when handling and installing, they are intended for use by qualified electronic engineers, please do not purchase and engage in any of these procedures if you are not competent to do so!
Reforming Electrolytic Capacitors
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Manufacturers
claim that most old electrolytic’s 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 aluminum 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!
PLEASE NOTE!
These parts 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 stored with us still in their original packaging, and in good serviceable condition, though may need reforming, see notes 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.
