Aluminum Electrolytic Capacitors: Solid Polymers and Aluminum Electrolytics

 Aluminum electrolytic and solid polymers, both have advantages and disadvantages when comparing to one another. Designers need to be aware of these differences when determining which capacitor type is best suited for use in their application.

The most notable difference between aluminum electrolytics and polymers is their electrolyte. Aluminum electrolytics have a liquid electrolyte while polymers have a solid electrolyte. These differences play a major role in the characteristics of each type of capacitor.

The solid polymer electrolyte gives the polymer capacitors advantageous characteristics over liquid aluminum electrolytic capacitors.

The advantages are as follows:
o Lower ESR at high frequency
o Lower D.F. / tan δ
o Higher ripple current ratings
o Stability over temperature
o Wider operating frequency range
o Long life

Following product list of Kingtronics Solid Polymer Electrolytic Capacitors for your reference.
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Polymer Aluminum Solid Electrolytic Capacitors- Product List
Kingtronics P/N	Type	Load Life	Temperatures	Characteristic
GKT-AS	Radial	2000H	105°C	Standard Low ESR
GKT-AR	Radial	2000H	105°C	Super Low ESR
GKT-AU	Radial	2000H	125°C	High Ripple Current
GKT-AX	Radial	2000H	125°C	High Temperature
GKT-AP	SMD	2000H	105°C	Low ESR
GKT-AJ	Radial	3000H	105°C	Super low ESR
GKT-AW	Radial	3000H	105°C	Low ESR
GKT-AK	Radial	5000H	105°C	Long life
GKT-AY	Radial	5000H	105°C	High voltage, long life
GKT-AH	SMD	5000H	105°C	SMD type, miniaturized