THIS PHILIPS 2222 050 56222 ELECTROLYTIC CAPACITOR IS A "PULL" - REMOVED/WORKING (BUT OLD - YES)
Ex obsolete (no longer has a useful purpose) Rohde & Schwarz Test Equipment
The WORKING equipment this was removed from (today) was very specialised audio analysis Rohde & Schwarz test equipment, German made. The functions of the equipment are no longer relevant in today's world of digital technology so I have carefully dismantled and parted out "useful" components that I am hoping will find a new life in other equipment.
This capacitor was part of the power supply filter network, having clean stable DC was extremely critical to the functioning of the original equipment.
Unfortunately a lot of my test equipment has found new homes (stupid me for selling them!) so I do NOT have any means of checking the characteristics of this capacitor but I do know the equipment was running to specifications and I did look at things like the ripple levels of the power supply, no problems at all. These capacitors have similar specifications (in fact better than the ROE in some respects) to the ROE (Roederstein) aluminium electrolytic capacitors I also have pulled from the same equipment, these capacitors are designed for their long term reliability & stability and they are especially favoured in high quality audio circuits.
It is IMPORTANT to read my information page about both new AND old stock electrolytic capacitors ... please go HERE
PHILIPS Holland
2222 050 56222 Series
Type 050 PW
Circa 1990's - (yes, 30 years old! But still working fine)
"Blue Cap" Very well known for long term reliability
Aluminium Electrolytic
Can package PCB mount
-10 ~ +30% value tolerance with long term stability
Very long useful life: 15,000 h at 85 °C but this at the extremes of operating environment temperatures. At 40C the useful life is quoted as at least 250,000 h continous (that is over 27 years having never been turned off!)
Low ESR
High ripple current capability
High resistance to shock and vibration
Operating temperature range -40 ~ +85C
2200uF
25V DC
Dimensions: 24mm diameter x 33mm height
Weight: 20g (this is why the capacitor has 3 terminals, 1 is intended solely as a support)
Most often these are used in linear power supplies as part of the DC filter network.
COSMETIC CONDITION:
Excellent physical condition
Absolutely no signs of stress or leakage! Not really surprising because the original equipment was only used periodically and certainly not continuously.
Untested characteristics (see my comments above about this) however the equipment this capacitor was removed from was fully functioning but of little use in today's world, being very outdated technology. Although I powered up the equipment for quite a few days (trying to understand what the equipment was supposed to measure!) it is a fact that over time of NON-USE, the capacitance of these 2222 050 series caps can go lower but when put back to use, the capacitor "reforms" and your capacitance comes right back up (if it was low in the first place), although the tolerances of the aluminium caps are pretty wide in anyway.
3x PCB mounting pins on the base
What? I hear you say, why 3 terminals?
Only two terminals matter, number 1 (positive) and number 5 (negative) Terminal 2 is used for mechanical stability only and not to be used as part of the filtering circuit. The base of the package clearly indicates which pin is which.
