Nippon CE02W Axial Electrolytic Capacitor 40V 470uF 2 Pieces MBD014i

£5.00

7 in stock

SKU: MBD014i Categories: , , ,

Description

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WE PURCHASE AND RECYCLE

SURPLUS ELECTRONIC

COMPONENTS AND EQUIPMENT!

For sale here we have the above…

DESCRIPTION

Aluminium Electrolytic 40V 470uF Axial

Diameter 16mm Length 31mm Lead length 38mm

2 Pieces

  • Capacitor Terminals: Axial Leaded
  • Diameter: 16mm
  • ESR:  Low
  • Body length: 31mm
  • Operating Temperature Max: +85°C
  • Operating Temperature Min: -40°C
  • Packaging: Bagged
  • Voltage Rating: 40V
  • Capacitance:  470uF

These came to us as part of a lot of surplus stock from a large Milspec type OEM and have been kept in storage for some years we have therefore classified them as ‘new other’. They are however in good serviceable condition providing they are reformed.

Nippon Chemi-Con are a Japanese based manufacturing Co. They produce components for the aerospace, transportation, energy and industrial markets and have a reputation for high quality and reliability. These capacitors are of that ilk, ideal if your project requires hi end components.

Please Note! Having been manufactured some years ago these capacitors will almost certainly need reforming. 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.

These capacitors are intended for sale to competent electronic engineers, like all electronic components considerable knowledge and skill is required when using them.

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 diagram below). As the capacitor reforms, the voltage across the resistor will drop (measured at the Xs). If that voltage will not drop below 10% of applied voltage after one hour, the capacitor is probably beyond help.

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!

For more information on this process search….  Reforming electrolytic capacitors

PLEASE NOTE!

These parts came to us as part of a lot of surplus stock from a large ‘Milspec ‘ type Co. and have been kept in storage for a time, they are however in pristine condition stored with us still in their original packaging and ‘as new’ in all respects, the photographs are representative of their excellent condition, 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.

Additional information

Brand

MPN