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Capacitance

 　
　

Capacitance is measured at 120HZ,less than 1.0 volts rms, at 25≧ Capacitance increases with increasing temperature.

 　
　 　
DC leakage current (DCL) 　
　

DC leakage current is the current that ,after a five minute charging period ,  flows through a capacitor when voltage is measured at 25≧ with full rated DC voltage applied to the   capacitor   through a 1000 ohm resistor in series with the capacitor. DC current increases with increasing temperature.

 　
　 　
Dissipation factor ( DF) 　
　 Dissipation factor is measured at 120HZ up to 1.0 volt rms maximum. DF increases with increasing frequency. 　
Temperature stability
　
Step NO. TEMP.

CAPACITANCE  

 DCL   

DF  

1

+25≧

Within specified tolerance

Within original limit  

Within original limit  

2

-55≧  

Within ＼10% initial value 

N/A  

Within original limit  

3

+25≧  

Within ＼5%  initial value 

Within original limit  

Within original limit  

4

+85≧  

Within ＼10%  initial value 

Within10X original limit  

See table 1  

5

+125≧  

Within ＼12%  initial value 

Within12X original limit  

See table 1  

6

+25≧  

Within ＼5%  initial value

Within original limit  

Within original limit

　
Temperature cycle 　
　 -55≧,room temperature,125≧ ,5 cycles 30min , Post test performance:  
 a. Capacitance---within ＼5% initial value
b. DC Leakage---within initial limit
c. DF--- within initial limit 		 　
　 　
Life test 　
　 2000 hours ,+85≧,rated voltage or 2000 hours,+125≧,2/3 rated voltage, post test performance:
a: Capacitance---within ＼10% initial value 
b. DC Leakage---within 200% initial limit
c. DF--- within 150% initial limit 		　
　 　
Surge voltage 　
　 85≧,1.15 rated voltage measurement is done after 1000 cycles of 0.5 minutes on 5.5 minutes off with 1000 Ω of series resistance. Post test performance: 
a. Capacitance---within ＼10% initial value
b. Leakage---within initial limit
c. DF--- within initial limit		 　
　
Solvent resistance 　
　 Solution: isopropyl alcohol, solution temp:20-25≧ .The specimen shall be completely immersed in the solution for 1 min.  and the marking shall be rubbed with a brush 10 times. The above cycle will be applied 3 times and then the marking shall be examined visually. post test performance:  
a. Capacitance---within initial limit
b. DC Leakage---within initial limit
c. DF--- within initial limit
d. physical---Marking must be legible 		　
　 　
Solder ability 　
　 Solder temperature:230＼5≧,immersion times (solder):3＼0.5sec, Immersion   in flux 5-10sec, .The specimen shall be immersed completely, post test performance:   The dipped portion of the termination is at least 95% covered by a new solder coating. 　
　 　

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