Datasheet
7© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com A4072_A759 • 11/29/2017
Single-Ended Conductive Polymer Aluminum Solid Electrolytic Capacitors
A759 125°C
Installing
Conductive polymer aluminum solid electrolytic capacitors are prone to a change in leakage current due to thermal stress
during soldering. The leakage current may increase after soldering or reow soldering. Therefore, verify the suitability for use
in circuits sensitive to leakage current.
A general principle is that lower temperature operation results in a longer, useful life of the capacitor. For this reason, it
should be ensured that electrolytic capacitors are placed away from heat-emitting components. Adequate space should be
allowed between components for cooling air to circulate, especially when high ripple current loads are applied. In any case,
the maximum rated temperature must not be exceeded.
• Do not deform the case of capacitors or use capacitors with a deformed case.
• Verify that the connections of the capacitors are able to insert on the board without excessive mechanical force.
Excessive force during insertion, as well as after soldering, may cause terminal damage and affect the electrical
performance.
• Ensure electrical insulation between the capacitor case, negative terminal, positive terminal and PCB.
• If the capacitors require mounting through additional means, the recommended mounting accessories shall be used.
• Verify the correct polarization of the capacitor on the board.
KEMET recommends to ensure that the voltage across each capacitor does not exceed its rated voltage.
Temperature Stability Characteristics
Stable characteristics in a very low temperature range allows for less circuits in the design.
Due to a solid polymer electrolyte, conductive polymer electrolytic capacitors feature higher conductivity. This results in
a lower ESR which, coupled with high capacitance, allows an aluminum polymer capacitor to replace several standard
electrolytic capacitors, reducing the number of components and maximizing board space.
The ESR of polymer capacitors is nearly constant within its operating temperature range, while the ESR of a standard
electrolytic capacitor noticeably changes with temperature.
0.01
0.1
1
10
100
1,000
Temperature (ºC)
ESR (Ω)
−20 0 20 70 105 125−55
Aluminum Electrolytic Conductive Polymer Electrolytic
Temperature Stability Characteristics