This is a Long-life grade capacitor made by Epcos (now TDK) in 2017.

Made in Hungary. New old stock, never used. 

All items are tested by Capacitance, Quality factor (and ESR) measurement.

Specification:

• Rated voltage: 500 V
• Surge voltage: 550 V
• Rated capacitance: 3900 uF
• Tolerance: +/-20 %
• Maximum operating temperature: 85 °C
• Useful life at 85 °C: 12 000 h
• Maximum current at 40°C, 100 Hz: 38 A
• Maximum current at 85°C, 100 Hz: 14 A
• ESR (max): 42 mΩ

Tested electrical parameters:

• Capacitance: 3,25 mF
• ESR: 23 mΩ (@ 120 Hz)
• Quality factor at 120 Hz: 18

Measured ESR is half of the specified max, therefore the product is in new condition, but please note that capacitance is -16...-17 % lower then the nominal (within +/-20 % tolerance). This is normal.

Applications: 

• Frequency converters
• Uninterruptible power supplies 
• For switch-mode power supplies in professional equipments
• Audio applications

Mechanical properties:

• Diameter: 77 mm
• Body height: 145 mm
• Total height: 176 mm. 
• Mounting: M12 screw
• Termination: M6 screw
• Mass: 850 g

The product will be shipped in original manufacturer's box if purchased 10-16 pcs.