BACKGROUND:
Sustainability is the name of the game! Anything (that has been tested and still functioning properly) should be repurposed creating saving in wasted Ee and reducing the poisoning our environment when items are buried in the earth at the local tip needlessly.
Never heard of Ee? It is a concept that creates a measurement of ALL things (not just electronics) that humans have made and the energy used in obtaining the raw material, processing the materials right through to a finished product and even should include the shipping of the item to the distributors/retailers.
If you would like to know more about Ee values, please take a look HERE
I have been unable to identify the manufacturer (SEC), but I strongly suspect these are of Chinese origin.
Although the construction of the capacitor looks to be fine, I am not so sure about the quality control during manufacture as two of the capacitors are within the indicated tolerance of 5% but the remaining two are more like 10% tolerance.
While the values of the latter two capacitors are a bit "off" the indicated nominal value, being polystyrene construction, the values should remain nice and stable over time.
UNIDENTIFIED MANUFACTURER - Polystyrene Capacitor
Country of origin unknown (but likely to be China)
Manufacturers "logo" SEC
Nominal value: 470pF
Tolerance: 5% (based on the letter J printed next to the value)
Voltage: unknown but to be on the conservative side, I wouldn't be putting more than 100V across this capacitor
Radial leads
Identification on the body ...
Construction of the capacitor is clearly visible, metal foil.
DIMENSIONS:
Body: 11mm Length x 4mm Diameter
Leads: 8.5mm Length minimum (some have the other lead being slightly longer than this)
COSMETIC CONDITION:
USED Tested
CLEAN
Leads are slightly dull but still remain perfectly serviceable
TESTING:
Because these were removed from some electronic filters, they needed to be checked ...
The manufacturer nominated value is 470pF (471 marking)
2x Capacitors measure 450 ~ 451pF which means they JUST fall inside the 5% tolerance range, on the low side
2x Capacitors measure 428 ~ 430pF which is well out of the 5% range but just within 10% of the nominated value.
I even did a double take on the tolerance markings on the caps but they all indicate being 5%
Because of this capacitance difference between two of the capacitor lots tested, I have now sealed them into two difference clear plastic packs which are labelled clearly to indicate the measured values. Keep in mind that the body marking and real life value would need to be checked before using in a critical circuit design e.g precision filtering.
If you only want a couple of these capacitors, please indicate with your order whether you would like the 5% tolerance capacitors or the 10% type (lower values)
